300+ FREE APIs Every Developer Needs to Know
Tags: api, webdev, programming, tutorial
Published: 2024-05-30 20:20:00

# Table of Contents

1. [Weather APIs ⛅️🌦️🌩️](#weather-apis)
2. [Exchange Rates APIs 💱💲💹](#exchange-rates-apis)
3. [Cryptocurrency APIs ₿💰🔗](#cryptocurrency-apis)
4. [Placeholder Image APIs 📸🖼️🎨](#placeholder-image-apis)
5. [Random Generators APIs 🎲🔀🎰](#random-generators-apis)
6. [News APIs 📰📢🗞️](#news-apis)
7. [Maps and Geolocation APIs 🗺️📍🌍](#maps-and-geolocation-apis)
8. [Search APIs 🔍📑🕵️](#search-apis)
9. [Machine Learning APIs 🤖🧠🔮](#machine-learning-apis)
10. [Screenshot and Picture APIs 📷🌐🖼️](#screenshot-and-picture-apis)
11. [SEO APIs 🔍📈💡](#seo-apis)
12. [Shopping APIs 🛍️🛒📦](#shopping-apis)
13. [Developer APIs 💻🔧🛠️](#developer-apis)
14. [Travel and Transportation APIs 🛫🚗🚉](#travel-and-transportation-apis)
15. [Communication APIs 📞💬📧](#communication-apis)
16. [Payment and Financial APIs 💳💸🏦](#payment-and-financial-apis)
17. [Analytics and Monitoring APIs 📊📈📉](#analytics-and-monitoring-apis)
18. [Natural Language Processing (NLP) APIs 🗣️🔍💬](#natural-language-processing-nlp-apis)
19. [Utilities and Tools APIs 🛠️🔧⚙️](#utilities-and-tools-apis)
20. [Government and Open Data APIs 🏛️📜📊](#government-and-open-data-apis)

[Qit.tools](https://qit.tools/) - ⚡ Interactive Online Web 🛠️ Tools

---

## Weather APIs ⛅️🌦️🌩️

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| OpenWeatherMap     | Global weather data including forecasts and current weather | 60 calls/min        | API key            | [Link](https://openweathermap.org/api) |
| Weatherstack       | Real-time and historical weather data                   | 1000 calls/month     | API key            | [Link](https://weatherstack.com/documentation) |
| Weatherbit         | Weather data including forecasts and current weather    | 500 calls/day        | API key            | [Link](https://www.weatherbit.io/api) |
| Climacell          | Hyper-local weather data and insights                   | 100 calls/day        | API key            | [Link](https://docs.climacell.co/) |
| AccuWeather        | Weather data and forecasts                              | 50 calls/day         | API key            | [Link](https://developer.accuweather.com/apis) |
| Visual Crossing    | Historical and current weather data                     | 1000 calls/day       | API key            | [Link](https://www.visualcrossing.com/weather-api) |
| Weather2020        | Weather forecasts                                       | 100 calls/day        | API key            | [Link](https://www.weather2020.com/weather-api/) |
| Storm Glass        | Marine weather data                                     | 50 calls/day         | API key            | [Link](https://stormglass.io/docs/) |
| WeatherAPI         | Weather data including forecasts and current weather    | 1000 calls/month     | API key            | [Link](https://www.weatherapi.com/docs/) |
| AerisWeather       | Weather data and imagery                                | 1000 calls/month     | API key            | [Link](https://www.aerisweather.com/support/docs/api/) |
| HERE Weather       | Weather data including forecasts and current weather    | 250,000 calls/month  | API key            | [Link](https://developer.here.com/documentation/weather/dev_guide/index.html) |
| World Weather Online | Global weather data including forecasts and historical weather | 500 calls/day | API key            | [Link](https://www.worldweatheronline.com/developer/) |
| Tomorrow.io        | Hyper-local weather data and insights                   | 100 calls/day        | API key            | [Link](https://docs.tomorrow.io/) |
| Dark Sky           | Weather data including forecasts and current weather    | 1000 calls/day       | API key            | [Link](https://darksky.net/dev) |
| National Weather Service | US government weather data                        | Unlimited            | None               | [Link](https://www.weather.gov/documentation/services-web-api) |

---

## Exchange Rates APIs 💱💲💹

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| ExchangeRate-API   | Accurate exchange rates for 160 currencies              | 1500 calls/month     | API key            | [Link](https://www.exchangerate-api.com/docs) |
| Open Exchange Rates| Real-time and historical exchange rates                 | 1000 calls/month     | API key            | [Link](https://docs.openexchangerates.org/) |
| Currencylayer      | Real-time exchange rates for 168 world currencies       | 1000 calls/month     | API key            | [Link](https://currencylayer.com/documentation) |
| Fixer              | Real-time exchange rates and currency conversion        | 1000 calls/month     | API key            | [Link](https://fixer.io/documentation) |
| XE Currency Data   | Real-time and historical exchange rates                 | 1000 calls/month     | API key            | [Link](https://xecdapi.xe.com/) |
| Forex Rate API     | Real-time and historical foreign exchange rates         | 1000 calls/month     | API key            | [Link](https://www.forexrateapi.com/documentation) |
| RatesAPI           | Free foreign exchange rates and currency conversion     | Unlimited            | None               | [Link](https://ratesapi.io/documentation/) |
| Exchange Rates API | Accurate exchange rates for 160 currencies              | 1500 calls/month     | API key            | [Link](https://www.exchangerate-api.com/docs) |
| OANDA Exchange Rates | Real-time and historical exchange rates                | 1000 calls/month     | API key            | [Link](https://www.oanda.com/fx-for-business/fx-data-services) |
| CurrencyConverter API | Real-time exchange rates and currency conversion      | 1000 calls/month     | API key            | [Link](https://www.currencyconverterapi.com/docs) |
| ExchangeRatesAPI   | Exchange rates and currency conversion                  | 1000 calls/month     | API key            | [Link](https://www.exchangeratesapi.io/documentation) |
| Alphavantage       | Real-time and historical exchange rates                 | 500 calls/day        | API key            | [Link](https://www.alphavantage.co/documentation/) |
| Xignite            | Foreign exchange rates API                              | 1000 calls/month     | API key            | [Link](https://www.xignite.com/xforex-rates) |
| Everbase Currency  | Exchange rates and currency conversion                  | 1000 calls/month     | API key            | [Link](https://currency-api.everbase.com/documentation) |
| ExchangeRateHost   | Foreign exchange rates API                              | Unlimited            | None               | [Link](https://exchangerate.host/#/#docs) |

---

## Cryptocurrency APIs ₿💰🔗

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| CoinGecko          | Cryptocurrency data for over 6000 coins                 | Unlimited            | None               | [Link](https://www.coingecko.com/en/api/documentation) |
| CoinMarketCap      | Cryptocurrency market cap rankings, charts, and more    | 333 calls/day        | API key            | [Link](https://coinmarketcap.com/api/documentation/) |
| CryptoCompare      | Cryptocurrency data and price comparison                | 250,000 calls/month  | API key            | [Link](https://min-api.cryptocompare.com/documentation) |
| Coinpaprika        | Cryptocurrency market data                              | 25,000 calls/month   | API key            | [Link](https://api.coinpaprika.com) |
| Nomics             | Cryptocurrency market cap and pricing data              | 125,000 calls/month  | API key            | [Link](https://nomics.com/docs/) |
| CoinAPI            | Real-time and historical cryptocurrency data            | 100,000 calls/month  | API key            | [Link](https://docs.coinapi.io/) |
| Messari            | Cryptocurrency data and research                        | 1000 calls/day       | API key            | [Link](https://messari.io/api) |
| Coinlore           | Cryptocurrency market data                              | Unlimited            | None               | [Link](https://www.coinlore.com/cryptocurrency-data-api) |
| Coinlib            | Cryptocurrency data including prices and market cap     | 100 requests/day     | API key            | [Link](https://coinlib.io/apidocs) |
| Bitfinex           | Cryptocurrency trading platform API                     | Unlimited            | None               | [Link](https://docs.bitfinex.com/docs) |
| Bittrex            | Cryptocurrency trading platform API                     | Unlimited            | None               | [Link](https://bittrex.github.io/api/v3) |
| Binance            | Cryptocurrency trading platform API                     | Unlimited            | None               | [Link](https://binance-docs.github.io/apidocs/spot/en/) |
| KuCoin             | Cryptocurrency trading platform API                     | Unlimited            | None               | [Link](https://docs.kucoin.com/) |
| Kraken             | Cryptocurrency trading platform API                     | Unlimited            | None               | [Link](https://www.kraken.com/features/api) |
| Poloniex           | Cryptocurrency trading platform API                     | Unlimited            | None               | [Link](https://docs.poloniex.com/) |

---

## Placeholder Image APIs 📸🖼️🎨

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| Lorem Picsum       | Random placeholder images                               | Unlimited            | None               | [Link](https://picsum.photos/) |
| Placeholder.com    | Custom placeholder images                               | Unlimited            | None               | [Link](https://placeholder.com/) |
| Unsplash Source    | High-quality placeholder images                         | Unlimited            | None               | [Link](https://source.unsplash.com/) |
| Placekitten        | Placeholder images of kittens                           | Unlimited            | None               | [Link](https://placekitten.com/) |
| PlaceDog           | Placeholder images of dogs                              | Unlimited            | None               | [Link](https://place.dog/) |
| Placebear          | Placeholder images of bears                             | Unlimited            | None               | [Link](https://placebear.com/) |
| Fill Murray        | Placeholder images of Bill Murray                       | Unlimited            | None               | [Link](http://www.fillmurray.com/) |
| FakerAPI           | Fake data and placeholder images                        | Unlimited            | None               | [Link](https://fakerapi.it/en) |
| DummyImage.com     | Custom placeholder images                               | Unlimited            | None               | [Link](https://dummyimage.com/) |
| ImagePlaceholder.com | Custom placeholder images                             | Unlimited            | None               | [Link](https://imageplaceholder.com/) |
| PlaceholderImage   | Placeholder images with custom text                     | Unlimited            | None               | [Link](https://placeholderimage.dev/) |
| Picsum.photos      | Random images from Unsplash                             | Unlimited            | None               | [Link](https://picsum.photos/) |
| RandomImageApi     | Random placeholder images                               | Unlimited            | None               | [Link](https://random.imagecdn.app/) |
| Plachold.it        | Custom placeholder images                               | Unlimited            | None               | [Link](https://placehold.it/) |
| LoremFlickr        | Random placeholder images                               | Unlimited            | None               | [Link](https://loremflickr.com/) |

---

## Random Generators APIs 🎲🔀🎰

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| Random.org         | True random number generation                           | 1,000,000 bits/day   | API key            | [Link](https://www.random.org/) |
| RandomUser         | Generate random user data                               | Unlimited            | None               | [Link](https://randomuser.me/) |
| FakerAPI           | Fake data generation                                    | Unlimited            | None               | [Link](https://fakerapi.it/en) |
| UUID Generator     | Generate random UUIDs                                   | Unlimited            | None               | [Link](https://www.uuidgenerator.net/) |
| DiceBear Avatars   | Generate random avatars                                 | Unlimited            | None               | [Link](https://avatars.dicebear.com/) |
| PasswordGenerator  | Generate random passwords                               | Unlimited            | None               | [Link](https://passwordwolf.com/api/) |
| Cat Facts          | Random cat facts                                        | Unlimited            | None               | [Link](https://catfact.ninja/) |
| Fun Translations   | Generate fun translations                               | 5 requests/day       | None               | [Link](https://funtranslations.com/api) |
| Quotes.rest        | Generate random quotes                                  | 10 requests/hour     | None               | [Link](https://quotes.rest/) |
| Advice Slip        | Random advice generator                                 | Unlimited            | None               | [Link](https://api.adviceslip.com/) |
| BoredAPI           | Suggestions for activities to do                        | Unlimited            | None               | [Link](https://www.boredapi.com/) |
| Lorem Ipsum        | Generate random placeholder text                        | Unlimited            | None               | [Link](https://loripsum.net/) |
| Uinames            | Generate random names                                   | Unlimited            | None               | [Link](https://uinames.com/) |
| Pipl               | Generate random people profiles                         | Unlimited            | None               | [Link](https://pipl.ir/) |
| Random Data API    | Generate random data for testing                        | Unlimited            | None               | [Link](https://random-data-api.com/) |

---

## News APIs 📰📢🗞️

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| NewsAPI            | Aggregates news articles from various sources           | 500 calls/day        | API key            | [Link](https://newsapi.org/docs) |
| CurrentsAPI        | Real-time news data                                      | 1000 calls/month     | API key            | [Link](https://currentsapi.services/en/docs/) |
| ContextualWebNews  | Real-time news search and discovery                      | 10,000 calls/month   | API key            | [Link](https://rapidapi.com/contextualwebsearch/api/web-search) |
| Bing News Search   | Microsoft Bing's news search results                     | 3000 calls/month     | API key            | [Link](https://docs.microsoft.com/en-us/azure/cognitive-services/bing-news-search/) |
| Mediastack         | Real-time news data                                      | 500 calls/month      | API key            | [Link](https://mediastack.com/documentation) |
| New York Times API | Access to The New York Times articles and archives       | Unlimited            | API key            | [Link](https://developer.nytimes.com/apis) |
| Guardian API       | Access to The Guardian articles and archives             | Unlimited            | API key            | [Link](https://open-platform.theguardian.com/documentation/) |
| Event Registry     | Real-time news and event data                            | 500 calls/month      | API key            | [Link](https://eventregistry.org/documentation) |
| GDELT Project      | Real-time event data and news                            | 10,000 calls/month   | API key            | [Link](https://blog.gdeltproject.org/gdelt-2-0-our-global-world-in-realtime/) |
| NewsData.io        | Real-time news articles from various sources             | 200 calls/day        | API key            | [Link](https://newsdata.io/docs) |
| ContextualWeb      | Search for news articles based on context                | 1000 calls/month     | API key            | [Link](https://contextualwebsearch.com/news-api) |
| MyNewsAPI          | Access to various news sources                           | 500 calls/month      | API key            | [Link](https://mynewsapi.com/documentation) |
| Webz.io            | Real-time news and blog data                             | 1000 calls/month     | API key            | [Link](https://webz.io/documentation) |
| AYLIEN News API    | News articles from various sources with analysis         | 200 calls/day        | API key            | [Link](https://newsapi.aylien.com/docs) |
| HackerNews         | Access to Hacker News articles                           | Unlimited            | None               | [Link](https://github.com/HackerNews/API) |

---

## Maps and Geolocation APIs 🗺️📍🌍

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| Google Maps API    | Comprehensive mapping and geolocation data              | $200 free usage/month| API key            | [Link](https://developers.google.com/maps/documentation) |
| Mapbox             | Custom maps and geolocation services                    | 50,000 views/month   | API key            | [Link](https://docs.mapbox.com/) |
| OpenCage Geocoding | Forward and reverse geocoding                           | 2,500 calls/day      | API key            | [Link](https://opencagedata.com/api) |
| HERE Maps          | Mapping and location data services                      | 250,000 calls/month  | API key            | [Link](https://developer.here.com/documentation) |
| OpenStreetMap      | Free editable map of the world                          | Unlimited            | None               | [Link](https://operations.osmfoundation.org/policies/nominatim/) |
| Positionstack      | Geocoding API for forward and reverse geocoding         | 25,000 calls/month   | API key             | [Link](https://positionstack.com/documentation) |
| TomTom             | Mapping and geolocation data services                   | 2,500 calls/day      | API key            | [Link](https://developer.tomtom.com/) |
| MapQuest           | Mapping and geolocation data services                   | 15,000 calls/month   | API key            | [Link](https://developer.mapquest.com/documentation/) |
| Ipstack            | IP geolocation API                                      | 10,000 calls/month   | API key            | [Link](https://ipstack.com/documentation) |
| Geocodio           | Geocoding and reverse geocoding                         | 2,500 calls/day      | API key            | [Link](https://www.geocod.io/) |
| LocationIQ         | Geocoding and reverse geocoding                         | 5,000 calls/day      | API key            | [Link](https://locationiq.com/docs) |
| Maptiler           | Maps, geocoding, and geolocation services               | 100,000 tile requests/month | API key        | [Link](https://www.maptiler.com/cloud/) |
| What3words         | Location services using 3-word addresses                | 1000 calls/month     | API key            | [Link](https://what3words.com/products) |
| SmartyStreets      | Address validation and geocoding                        | 250 requests/month   | API key            | [Link](https://smartystreets.com/docs) |
| Geoapify           | Geocoding, routing, and other location services         | 30,000 requests/month| API key            | [Link](https://apidocs.geoapify.com/) |

---

## Search APIs 🔍📑🕵️

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| Google Custom Search| Search the web or specific sites                        | 100 queries/day      | API key            | [Link](https://developers.google.com/custom-search/v1/overview) |
| Algolia            | Fast, reliable search as a service                      | 10,000 records       | API key            | [Link](https://www.algolia.com/doc/) |
| Bing Search API    | Microsoft Bing's search results                         | 3,000 calls/month    | API key            | [Link](https://docs.microsoft.com/en-us/azure/cognitive-services/bing-web-search/) |
| Elastic Search     | Search engine based on Lucene                           | Free tier available  | API key            | [Link](https://www.elastic.co/guide/en/elasticsearch/reference/current/search.html) |
| Swiftype           | Custom search engine for your site                      | 1000 requests/month  | API key            | [Link](https://swiftype.com/documentation) |
| MeiliSearch        | Fast, open-source search engine                         | Unlimited            | None               | [Link](https://docs.meilisearch.com/) |
| AddSearch          | Custom search for your website                          | 50 searches/day      | API key            | [Link](https://www.addsearch.com/docs/) |
| Yandex Search API  | Search the web using Yandex                             | 10,000 requests/day  | API key            | [Link](https://yandex.com/dev/search/) |
| Yahoo Search       | Search the web using Yahoo                              | 5,000 queries/day    | API key            | [Link](https://developer.yahoo.com/boss/search/) |
| Wolfram Alpha      | Computational knowledge engine                          | 2,000 queries/month  | API key            | [Link](https://products.wolframalpha.com/api/documentation/) |
| ContextualWebSearch| Web search with context filtering                       | 10,000 calls/month   | API key            | [Link](https://rapidapi.com/contextualwebsearch/api/web-search) |
| Site Search 360    | Search your website or app                              | 1,500 requests/month | API key            | [Link](https://www.sitesearch360.com/docs/) |
| DuckDuckGo API     | Search the web anonymously                              | Unlimited            | None               | [Link](https://duckduckgo.com/api) |
| Search.io          | Search as a service                                     | 1000 operations/month| API key            | [Link](https://search.io/docs) |
| Apache Solr        | Highly reliable, scalable search platform               | Open-source          | None               | [Link](https://solr.apache.org/guide/) |

---

## Machine Learning APIs 🤖🧠🔮

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| Google Cloud ML    | Machine learning services and APIs                      | $300 free credit     | API key            | [Link](https://cloud.google.com/products/ai) |
| Amazon SageMaker   | Build, train, and deploy machine learning models        | Free tier available  | API key            | [Link](https://aws.amazon.com/sagemaker/) |
| IBM Watson         | AI and machine learning services                        | Free tier available  | API key            | [Link](https://www.ibm.com/watson/products-services/) |
| Microsoft Azure ML  | Machine learning services and APIs                      | $200 free credit     | API key            | [Link](https://azure.microsoft.com/en-us/services/machine-learning/) |
| Hugging Face       | State-of-the-art NLP models and APIs                    | Free tier available  | API key            | [Link](https://huggingface.co/docs) |
| OpenAI             | AI models including GPT-3                               | Free tier available  | API key            | [Link](https://beta.openai.com/docs/) |
| BigML              | Machine learning platform and APIs                      | Free tier available  | API key            | [Link](https://bigml.com/) |
| Clarifai           | Image and video recognition services                    | Free tier available  | API key            | [Link](https://docs.clarifai.com/) |
| DataRobot          | Machine learning model deployment and management        | Free tier available  | API key            | [Link](https://www.datarobot.com/) |
| MonkeyLearn        | Text analysis and machine learning                      | 300 queries/month    | API key            | [Link](https://monkeylearn.com/api/) |
| Aylien             | Natural language processing and machine learning        | Free tier available  | API key            | [Link](https://aylien.com/text-api/) |
| Algorithmia        | Algorithm marketplace and machine learning APIs         | 10,000 queries/month | API key            | [Link](https://algorithmia.com/developers) |
| Spell              | Machine learning infrastructure and tools               | Free tier available  | API key            | [Link](https://spell.run/docs) |
| Neptune.ai         | Machine learning model management and monitoring        | Free tier available  | API key            | [Link](https://neptune.ai/) |
| Vize.ai            | Custom machine learning model creation                  | Free tier available  | API key            | [Link](https://vize.ai/) |

---

## Screenshot and Picture APIs 📷🌐🖼️

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| ScreenshotAPI      | Capture screenshots of websites                         | 100 screenshots/month| API key            | [Link](https://screenshotapi.net/documentation) |
| URLBox             | Capture screenshots and convert web pages to PDFs       | 100 captures/month   | API key            | [Link](https://urlbox.io/docs) |
| Page2Images        | Capture screenshots of web pages                        | 1000 screenshots/month| API key           | [Link](https://www.page2images.com/) |
| ShrinkTheWeb       | Capture screenshots and thumbnails of web pages         | 1000 captures/month  | API key            | [Link](https://www.shrinktheweb.com/) |
| Browshot           | Capture screenshots of websites                         | 1000 credits/month   | API key            | [Link](https://browshot.com/api/documentation) |
| Thumbnail.ws       | Capture screenshots of websites                         | 500 screenshots/month| API key            | [Link](https://thumbnail.ws/) |
| Urlbox             | Capture screenshots of websites                         | 1000 captures/month  | API key            | [Link](https://www.urlbox.io/) |
| ScreenshotLayer    | Capture screenshots of websites                         | 100 captures/month   | API key            | [Link](https://screenshotlayer.com/documentation) |
| ApiFlash           | Capture screenshots of websites                         | 100 screenshots/month| API key            | [Link](https://apiflash.com/documentation) |
| AbstractAPI Screenshot | Capture screenshots of websites                     | 100 screenshots/month| API key            | [Link](https://www.abstractapi.com/website-screenshot-api) |
| Snapito            | Capture screenshots of websites                         | 100 captures/month   | API key            | [Link](https://snapito.com/) |
| Website2PDF        | Convert web pages to PDFs                               | 100 captures/month   | API key            | [Link](https://website2pdf.io/) |
| ScreenshotMachine  | Capture screenshots of websites                         | 1000 screenshots/month| API key           | [Link](https://www.screenshotmachine.com/) |
| Stillio            | Automatic website screenshot capture                    | 1000 captures/month  | API key            | [Link](https://stillio.com/) |
| GemPixel           | Capture screenshots of websites                         | 100 captures/month   | API key            | [Link](https://www.gempixel.com/) |

---

## SEO APIs 🔍📈💡

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| Moz                | SEO metrics and data                                    | 100 requests/month   | API key            | [Link](https://moz.com/products/api) |
| SEMrush            | SEO metrics and data                                    | 100 requests/month   | API key            | [Link](https://www.semrush.com/api/) |
| Serpstat           | SEO metrics and data                                    | 1000 queries/day     | API key            | [Link](https://serpstat.com/api/) |
| SpyFu              | SEO metrics and competitor analysis                     | 500 requests/month   | API key            | [Link](https://www.spyfu.com/api) |
| DataForSEO         | SEO data for keywords, SERPs, and more                  | 100 requests/month   | API key            | [Link](https://docs.dataforseo.com/) |
| CognitiveSEO       | SEO metrics and data                                    | 1000 requests/month  | API key            | [Link](https://cognitiveseo.com/api/) |
| Majestic           | SEO metrics and data                                    | 100 requests/month   | API key            | [Link](https://developer.majestic.com/) |
| SERP API           | Real-time search engine results                         | 1000 requests/month  | API key            | [Link](https://serpapi.com/) |
| RankRanger         | SEO metrics and rank tracking                           | 1000 requests/month  | API key            | [Link](https://www.rankranger.com/api) |
| Seobility          | SEO metrics and data                                    | 1000 requests/month  | API key            | [Link](https://seobility.net/en/api/) |
| BrightLocal        | Local SEO data and metrics                              | 1000 requests/month  | API key            | [Link](https://www.brightlocal.com/api/) |
| SearchMetrics      | SEO metrics and data                                    | 1000 requests/month  | API key            | [Link](https://www.searchmetrics.com/api/) |
| STAT               | Real-time search engine results                         | 1000 requests/month  | API key            | [Link](https://getstat.com/api/) |
| Linkody            | Backlink checker and SEO metrics                        | 1000 requests/month  | API key            | [Link](https://www.linkody.com/api) |

---

## Shopping APIs 🛍️🛒📦

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| Amazon Product Advertising API | Access to Amazon product data               | 1,000 requests/month | API key            | [Link](https://webservices.amazon.com/paapi5/documentation) |
| eBay API           | Access to eBay product data and marketplace             | 5,000 requests/day   | API key            | [Link](https://developer.ebay.com/api-docs/static/apis.html) |
| Walmart API        | Access to Walmart product data and marketplace          | 5,000 requests/day   | API key            | [Link](https://developer.walmart.com/) |
| Best Buy API       | Access to Best Buy product data                         | 5,000 requests/day   | API key            | [Link](https://developer.bestbuy.com/) |
| Etsy API           | Access to Etsy product data and marketplace             | 5,000 requests/day   | API key            | [Link](https://www.etsy.com/developers/documentation) |
| Rakuten API        | Access to Rakuten product data and marketplace          | 5,000 requests/day   | API key            | [Link](https://webservice.rakuten.co.jp/documentation/) |
| Shopify API        | Access to Shopify store data and marketplace            | Unlimited            | API key            | [Link](https://shopify.dev/api) |
| WooCommerce API    | Access to WooCommerce store data and marketplace        | Unlimited            | API key            | [Link](https://woocommerce.github.io/woocommerce-rest-api-docs/) |
| BigCommerce API    | Access to BigCommerce store data and marketplace        | Unlimited            | API key            | [Link](https://developer.bigcommerce.com/api-reference) |
| AliExpress API     | Access to AliExpress product data and marketplace       | 1,000 requests/day   | API key            | [Link](https://developers.aliexpress.com/en/doc.htm) |
| Zalando API        | Access to Zalando product data and marketplace          | 5,000 requests/day   | API key            | [Link](https://developers.zalando.com/) |
| Target API         | Access to Target product data and marketplace           | 1,000 requests/day   | API key            | [Link](https://developer.target.com/) |
| Flipkart API       | Access to Flipkart product data and marketplace         | 5,000 requests/day   | API key            | [Link](https://affiliate.flipkart.com/api-docs) |
| Costco API         | Access to Costco product data and marketplace           | 5,000 requests/day   | API key            | [Link](https://costco.com/) |
| Home Depot API     | Access to Home Depot product data and marketplace       | 5,000 requests/day   | API key            | [Link](https://developer.homedepot.com/) |

---

## Developer APIs 💻🔧🛠️

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| GitHub API         | Access to GitHub data                                   | Unlimited            | OAuth              | [Link](https://docs.github.com/en/rest) |
| GitLab API         | Access to GitLab data                                   | Unlimited            | OAuth              | [Link](https://docs.gitlab.com/ee/api/) |
| Bitbucket API      | Access to Bitbucket data                                | Unlimited            | OAuth              | [Link](https://developer.atlassian.com/bitbucket/api/2/reference/) |
| Travis CI API      | Access to Travis CI data                                | Unlimited            | API key            | [Link](https://developer.travis-ci.com/) |
| Jenkins API        | Access to Jenkins data                                  | Unlimited            | API key            | [Link](https://www.jenkins.io/doc/book/using/remote-access-api/) |
| CircleCI API       | Access to CircleCI data                                 | Unlimited            | API key            | [Link](https://circleci.com/docs/api/v2/) |
| GitKraken API      | Access to GitKraken data                                | Unlimited            | API key            | [Link](https://support.gitkraken.com/developers/) |
| Heroku API         | Access to Heroku data and services                      | Unlimited            | OAuth              | [Link](https://devcenter.heroku.com/articles/platform-api-reference) |
| Vercel API         | Access to Vercel data and services                      | Unlimited            | API key            | [Link](https://vercel.com/docs/api) |
| Netlify API        | Access to Netlify data and services                     | Unlimited            | OAuth              | [Link](https://docs.netlify.com/api/get-started/) |
| Firebase API       | Access to Firebase data and services                    | Unlimited            | API key            | [Link](https://firebase.google.com/docs/reference/rest) |
| DigitalOcean API   | Access to DigitalOcean data and services                | Unlimited            | OAuth              | [Link](https://developers.digitalocean.com/documentation/v2/) |
| AWS API            | Access to AWS data and services                         | Free tier available  | API key            | [Link](https://docs.aws.amazon.com/) |
| Azure API          | Access to Azure data and services                       | Free tier available  | API key            | [Link](https://docs.microsoft.com/en-us/azure/azure-api-management/) |
| Google Cloud API   | Access to Google Cloud data and services                | $300 free credit     | API key            | [Link](https://cloud.google.com/apis) |

---

## Travel and Transportation APIs 🛫🚗🚉

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| Skyscanner API     | Access to flight search and booking data                | 500 requests/day     | API key            | [Link](https://developers.skyscanner.net/docs) |
| Amadeus API        | Access to travel booking and search data                | 500 calls/day        | API key            | [Link](https://developers.amadeus.com/) |
| Google Flights API | Access to flight search and booking data                | 1000 requests/day    | API key            | [Link](https://developers.google.com/flights) |
| Rome2Rio API       | Access to multimodal travel search data                 | 1000 requests/day    | API key            | [Link](https://www.rome2rio.com/documentation/search) |
| Sabre API          | Access to travel booking and search data                | 500 requests/day     | API key            | [Link](https://developer.sabre.com/docs/read/rest_apis) |
| Kayak API          | Access to flight and hotel search data                  | 500 requests/day     | API key            | [Link](https://developer.kayak.com/) |
| Expedia API        | Access to travel booking and search data                | 500 requests/day     | API key            | [Link](https://developers.expediagroup.com/docs/apis) |
| Priceline API      | Access to travel booking and search data                | 500 requests/day     | API key            | [Link](https://developer.priceline.com/docs/apis) |
| TripAdvisor API    | Access to travel reviews and search data                | 500 requests/day     | API key            | [Link](https://developer-tripadvisor.com/home/docs) |
| Airbnb API         | Access to short-term rental data                        | 500 requests/day     | API key            | [Link](https://developer.airbnb.com/docs) |
| Lyft API           | Access to ride-sharing data                             | 1000 requests/day    | API key            | [Link](https://developer.lyft.com/docs) |
| Uber API           | Access to ride-sharing data                             | 1000 requests/day    | API key            | [Link](https://developer.uber.com/docs) |
| BlaBlaCar API      | Access to carpooling data                               | 500 requests/day     | API key            | [Link](https://dev.blablacar.com/docs) |
| Yelp API           | Access to business and review data                      | 5000 requests/day    | API key            | [Link](https://www.yelp.com/developers/documentation/v3) |
| TransportAPI       | Access to public transport data                         | 1000 requests/day    | API key            | [Link](https://developer.transportapi.com/docs) |

---

## Communication APIs 📞💬📧

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| Twilio API         | Access to SMS, voice, and messaging services            | Free tier available  | API key            | [Link](https://www.twilio.com/docs/usage/api) |
| SendGrid API       | Access to email sending services                        | 100 emails/day       | API key            | [Link](https://docs.sendgrid.com/) |
| Mailgun API        | Access to email sending services                        | 5,000 emails/month   | API key            | [Link](https://documentation.mailgun.com/en/latest/) |
| Nexmo API          | Access to SMS, voice, and messaging services            | Free tier available  | API key            | [Link](https://developer.nexmo.com/api) |
| Plivo API          | Access to SMS, voice, and messaging services            | Free tier available  | API key            | [Link](https://www.plivo.com/docs/) |
| Pusher API         | Real-time communication services                        | Free tier available  | API key            | [Link](https://pusher.com/docs) |
| Postmark API       | Access to email sending services                        | 100 emails/month     | API key            | [Link](https://postmarkapp.com/developer) |
| SignalWire API     | Access to SMS, voice, and messaging services            | Free tier available  | API key            | [Link](https://signalwire.com/resources/docs) |
| Mandrill API       | Access to email sending services                        | 2,000 emails/month   | API key            | [Link](https://mandrillapp.com/api/docs/) |
| ClickSend API      | Access to SMS, voice, and messaging services            | Free tier available  | API key            | [Link](https://developers.clicksend.com/docs/rest/v3/) |
| Tropo API          | Access to SMS, voice, and messaging services            | Free tier available  | API key            | [Link](https://www.tropo.com/docs) |
| Slack API          | Access to Slack messaging services                      | Free tier available  | API key            | [Link](https://api.slack.com/) |
| Discord API        | Access to Discord messaging services                    | Free tier available  | API key            | [Link](https://discord.com/developers/docs/intro) |
| Zoom API           | Access to Zoom video conferencing services              | Free tier available  | API key            | [Link](https://marketplace.zoom.us/docs/api-reference/zoom-api) |
| Intercom API       | Access to Intercom messaging services                   | Free tier available  | API key            | [Link](https://developers.intercom.com/intercom-api-reference) |

---

## Payment and Financial APIs 💳💸🏦

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| Stripe API         | Access to payment processing services                   | Free tier available  | API key            | [Link](https://stripe.com/docs/api) |
| PayPal API         | Access to payment processing services                   | Free tier available  | API key            | [Link](https://developer.paypal.com/docs/api/overview/) |
| Square API         | Access to payment processing services                   | Free tier available  | API key            | [Link](https://developer.squareup.com/reference/square) |
| Braintree API      | Access to payment processing services                   | Free tier available  | API key            | [Link](https://developer.paypal.com/braintree/docs/guides/overview) |
| Authorize.net API  | Access to payment processing services                   | Free tier available  | API key            | [Link](https://developer.authorize.net/api/reference/index.html) |
| Plaid API          | Access to financial data and services                   | Free tier available  | API key            | [Link](https://plaid.com/docs/) |
| Dwolla API         | Access to payment processing services                   | Free tier available  | API key            | [Link](https://developers.dwolla.com/guides/) |
| Wise API           | Access to international money transfer services         | Free tier available  | API key            | [Link](https://developer.transferwise.com/) |
| Worldpay API       | Access to payment processing services                   | Free tier available  | API key            | [Link](https://developer.worldpay.com/docs) |
| WePay API          | Access to payment processing services                   | Free tier available  | API key            | [Link](https://developer.wepay.com/) |
| Revolut API        | Access to financial data and services                   | Free tier available  | API key            | [Link](https://developer.revolut.com/docs) |
| Xero API           | Access to accounting and financial data                 | Free tier available  | API key            | [Link](https://developer.xero.com/documentation/api) |
| QuickBooks API     | Access to accounting and financial data                 | Free tier available  | API key            | [Link](https://developer.intuit.com/app/developer/qbo/docs/get-started) |
| Yodlee API         | Access to financial data and services                   | Free tier available  | API key            | [Link](https://developer.yodlee.com/apidocs) |
| Intuit API         | Access to accounting and financial data                 | Free tier available  | API key            | [Link](https://developer.intuit.com/) |

---

## Analytics and Monitoring APIs 📊📈📉

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| Google Analytics API | Access to Google Analytics data                       | Free tier available  | API key            | [Link](https://developers.google.com/analytics/devguides/reporting/core/v4) |
| Mixpanel API       | Access to Mixpanel analytics data                       | Free tier available  | API key            | [Link](https://developer.mixpanel.com/docs) |
| Amplitude API      | Access to Amplitude analytics data                      | Free tier available  | API key            | [Link](https://www.amplitude.com/developers/apis) |
| Hotjar API         | Access to Hotjar analytics data                         | Free tier available  | API key            | [Link](https://developer.hotjar.com/docs) |
| Heap API           | Access to Heap analytics data                           | Free tier available  | API key            | [Link](https://docs.heap.io/docs) |
| Piwik PRO API      | Access to Piwik PRO analytics data                      | Free tier available  | API key            | [Link](https://piwikpro.dev/documentation) |
| Segment API        | Access to Segment analytics data                        | Free tier available  | API key            | [Link](https://segment.com/docs/) |
| Crazy Egg API      | Access to Crazy Egg analytics data                      | Free tier available  | API key            | [Link](https://www.crazyegg.com/api) |
| Woopra API         | Access to Woopra analytics data                         | Free tier available  | API key            | [Link](https://www.woopra.com/docs/api) |
| Kissmetrics API    | Access to Kissmetrics analytics data                    | Free tier available  | API key            | [Link](https://www.kissmetrics.io/api) |
| Clicky API         | Access to Clicky analytics data                         | Free tier available  | API key            | [Link](https://clicky.com/help/api) |
| Open Web Analytics API | Access to Open Web Analytics data                   | Free tier available  | API key            | [Link](https://www.openwebanalytics.com/api/) |
| Yandex Metrica API | Access to Yandex Metrica analytics data                 | Free tier available  | API key            | [Link](https://yandex.com/support/metrica/quick-start.html) |
| StatCounter API    | Access to StatCounter analytics data                    | Free tier available  | API key            | [Link](https://statcounter.com/docs/) |
| Chartbeat API      | Access to Chartbeat analytics data                      | Free tier available  | API key            | [Link](https://chartbeat.com/docs/api/) |

---

## Natural Language Processing (NLP) APIs 🗣️🔍💬

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| Google Cloud NLP   | Natural language processing services                    | $300 free credit     | API key            | [Link](https://cloud.google.com/natural-language/docs) |
| IBM Watson NLP     | Natural language processing services                    | Free tier available  | API key            | [Link](https://www.ibm.com/watson/services/natural-language-understanding/) |
| Microsoft Azure NLP| Natural language processing services                    | $200 free credit     | API key            | [Link](https://azure.microsoft.com/en-us/services/cognitive-services/text-analytics/) |
| Amazon Comprehend  | Natural language processing services                    | Free tier available  | API key            | [Link](https://aws.amazon.com/comprehend/) |
| TextRazor          | Natural language processing services                    | 5000 requests/month  | API key            | [Link](https://www.textrazor.com/docs) |
| Aylien NLP         | Natural language processing services                    | Free tier available  | API key            | [Link](https://aylien.com/text-api/) |
| MonkeyLearn        | Text analysis and natural language processing           | 300 queries/month    | API key            | [Link](https://monkeylearn.com/api/) |
| MeaningCloud       | Text analysis and natural language processing           | 20,000 requests/month| API key            | [Link](https://www.meaningcloud.com/developer/apis) |
| Algorithmia NLP    | Natural language processing algorithms                  | 10,000 queries/month | API key            | [Link](https://algorithmia.com/developers) |
| Wit.ai             | Natural language processing and chatbot integration     | Free tier available  | API key            | [Link](https://wit.ai/docs) |
| Lexalytics         | Text analysis and natural language processing           | Free tier available  | API key            | [Link](https://www.lexalytics.com/developers) |
| SapienAPI          | Natural language processing services                    | Free tier available  | API key            | [Link](https://www.sapien.com/api) |
| ChatterBot         | Natural language processing and chatbot integration     | Free tier available  | None               | [Link](https://chatterbot.readthedocs.io/en/stable/) |
| TisaneAPI          | Text analysis and natural language processing           | 30,000 requests/month| API key            | [Link](https://tisane.ai/documentation) |
| DeepAI Text API    | Natural language processing services                    | Free tier available  | API key            | [Link](https://deepai.org/machine-learning-model/text-tagging) |

---

## Utilities and Tools APIs 🛠️🔧⚙️

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| IPinfo             | IP address information and geolocation                  | 50,000 requests/month| API key            | [Link](https://ipinfo.io/developers) |
| OpenWeatherMap     | Weather data including forecasts and current weather    | 60 calls/min        | API key            | [Link](https://openweathermap.org/api) |
| Twilio API         | Access to SMS, voice, and messaging services            | Free tier available  | API key            | [Link](https://www.twilio.com/docs/usage/api) |
| SendGrid API       | Access to email sending services                        | 100 emails/day       | API key            | [Link](https://docs.sendgrid.com/) |
| Clearbit API       | Business intelligence data                              | 50,000 requests/month| API key            | [Link](https://clearbit.com/docs) |
| IPStack            | IP geolocation and information                          | 10,000 requests/month| API key            | [Link](https://ipstack.com/documentation) |
| AbstractAPI        | Various utility APIs like IP geolocation, email validation | 500 requests/month | API key            | [Link](https://www.abstractapi.com/) |
| Apify API          | Web scraping and automation                             | 10,000 requests/month| API key            | [Link](https://docs.apify.com/api/v2) |
| ScraperAPI         | Web scraping tool                                       | 5000 requests/month  | API key            | [Link](https://www.scraperapi.com/documentation/) |
| Postman API        | API development and testing tools                       | Unlimited            | API key            | [Link](https://www.postman.com/api-documentation/) |
| Sentry API         | Application monitoring and error tracking               | 5000 events/month    | API key            | [Link](https://docs.sentry.io/api/) |
| Stripe API         | Access to payment processing services                   | Free tier available  | API key            | [Link](https://stripe.com/docs/api) |
| PDF.co API         | PDF generation and data extraction                      | 1000 requests/month  | API key            | [Link](https://apidocs.pdf.co/) |
| Bitly API          | URL shortening and link management                      | 1000 requests/month  | API key            | [Link](https://dev.bitly.com/docs/) |
| OpenCage Geocoding | Forward and reverse geocoding                           | 2,500 calls/day      | API key            | [Link](https://opencagedata.com/api) |

---

## Government and Open Data APIs 🏛️📜📊

| Name               | Description                                             | Free Tier Limit      | Authentication     | Documentation                    |
|--------------------|---------------------------------------------------------|----------------------|--------------------|----------------------------------|
| Data.gov API       | US government open data                                 | Unlimited            | None               | [Link](https://www.data.gov/developers/apis) |
| UK Government API  | UK government open data                                 | Unlimited            | None               | [Link](https://www.gov.uk/guidance/using-the-api) |
| EU Open Data Portal API | European Union open data                          | Unlimited            | None               | [Link](https://data.europa.eu/euodp/en/developers-corner) |
| World Bank API     | Global development data                                 | Unlimited            | None               | [Link](https://datahelpdesk.worldbank.org/knowledgebase/topics/125589) |
| UN Data API        | United Nations open data                                | Unlimited            | None               | [Link](https://data.un.org/Host.aspx?Content=API) |
| OECD Data API      | Economic and social data from OECD                      | Unlimited            | None               | [Link](https://data.oecd.org/api/) |
| Census.gov API     | US Census Bureau data                                   | Unlimited            | API key            | [Link](https://www.census.gov/data/developers/data-sets.html) |
| Open Data Soft     | Various open data from different sources                | Unlimited            | API key            | [Link](https://www.opendatasoft.com/) |
| City of New York API | New York City open data                               | Unlimited            | None               | [Link](https://opendata.cityofnewyork.us/) |
| USGS API           | US Geological Survey data                               | Unlimited            | API key            | [Link](https://www.usgs.gov/products/data-and-tools/apis) |
| NASA API           | Access to NASA data and imagery                         | Unlimited            | API key            | [Link](https://api.nasa.gov/) |
| Open States API    | US state legislative data                               | Unlimited            | API key            | [Link](https://openstates.org/data/) |
| USA.gov API        | US government information and services                  | Unlimited            | None               | [Link](https://www.usa.gov/developer) |
| Data.gov.au API    | Australian government open data                         | Unlimited            | None               | [Link](https://data.gov.au/) |
| HealthData.gov API | US health-related open data                             | Unlimited            | None               | [Link](https://healthdata.gov/) |
| Gov.br API | Brazil | Unlimited | None | [Link](https://gov.br/conecta/catalogo/) |


---


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