## ChatGPT `gpt-3.5-turbo` API for Free (as a Reverse Proxy)

Welcome to the ChatGPT API Free Reverse Proxy, offering free self-hosted API access to ChatGPT (`gpt-3.5-turbo`) with OpenAI's familiar structure, so no code changes are needed.

## Quick Links

- [Join our Discord Community](https://discord.pawan.krd) for support and questions.
	- ⚡Note: Your Discord account must be at least 7 days old to be able join our Discord community.

## Table of Contents

- [Features](#features)
- Option 1: [Installing/Self-Hosting Guide](#installingself-hosting-guide) (Without using any API key)
  - Method 1: [Using Docker](#using-docker) or [Run it with a Chat Web UI using docker-compose](./docker-compose)
  - Method 2: [Your PC/Server](#your-pcserver) (manually)
  - Method 3: [Termux on Android Phones](#termux-on-android-phones)
- Option 2: [Accessing Our Hosted API](#accessing-our-hosted-api) (Free)
- [Usage Examples](#usage-examples)
- [License](#license)

## Features

- **Streaming Response**: The API supports streaming response, so you can get the response as soon as it's available.
- **API Endpoint Compatibility**: Full alignment with official OpenAI API endpoints, ensuring hassle-free integration with existing OpenAI libraries.
- **Complimentary Access**: No charges for API usage, making advanced AI accessible to everyone even **without an API key**.

## Installing/Self-Hosting Guide

### Using Docker
1. Ensure Docker is installed by referring to the [Docker Installation Docs](https://docs.docker.com/engine/install/).
2. Run the following command:
   ```bash
   docker run -dp 3040:3040 pawanosman/chatgpt:latest
   ```
3. Done! You can now connect to your local server's API at:
   ```
   http://localhost:3040/v1/chat/completions
   ```
   Note that the base URL is `http://localhost:3040/v1`.

### Install with chat web interfaces
✅ You can run third-party chat web interfaces, such as BetterChatGPT and LobeChat, with this API using Docker Compose. [Click here for the installation guide](./docker-compose).

### Your PC/Server

To install and run the ChatGPT API Reverse Proxy on your PC/Server by following these steps:

Note: This option is not available to all countries yet. if you are from a country that is not supported, you can use a **U.S. VPN** or use **our hosted API**.

1. Ensure NodeJs (v19+) is installed: [Download NodeJs](https://nodejs.org/en/download)
2. Clone this repository:
   ```bash
   git clone https://github.com/PawanOsman/ChatGPT.git
   ```
3. Open `start.bat` (Windows) or `start.sh` (Linux with `bash start.sh` command) to install dependencies and launch the server.
4. Done, you can connect to your local server's API at:
   ```
   http://localhost:3040/v1/chat/completions
   ```
   Note that the base url will be `http://localhost:3040/v1`

To include installation instructions for Termux on Android devices, you can add the following section right after the instructions for Linux in the **Installing/Self-Hosting Guide**:

### Termux on Android Phones

To install and run the ChatGPT API Reverse Proxy on Android using Termux, follow these steps:

1. Install [Termux](https://play.google.com/store/apps/details?id=com.termux) from the Play Store.
2. Update Termux packages:
   ```bash
   apt update
   ```
3. Upgrade Termux packages:
   ```bash
   apt upgrade
   ```
4. Install git, Node.js, and npm:
   ```bash
   apt install -y git nodejs
   ```
5. Clone the repository:
   ```bash
   git clone https://github.com/PawanOsman/ChatGPT.git
   ```
6. Navigate to the cloned directory:
   ```bash
   cd ChatGPT
   ```
7. Start the server with:

   ```bash
   bash start.sh
   ```

8. Your local server will now be running and accessible at:

   ```
   http://localhost:3040/v1/chat/completions
   ```

   Note that the base url will be `http://localhost:3040/v1`

   You can now use this address to connect to your self-hosted ChatGPT API Reverse Proxy from Android applications/websites that support reverse proxy configurations, on the same device.

## Accessing Our Hosted API

Utilize our pre-hosted ChatGPT-like API for free by:

1. Joining our [Discord server](https://discord.pawan.krd).
2. Obtaining an API key from the `#Bot` channel with the `/key` command.
3. Incorporating the API key into your requests to:
   ```
   https://api.pawan.krd/v1/chat/completions
   ```

## Usage Examples

Leverage the same integration code as OpenAI's official libraries by simply adjusting the API key and base URL in your requests. For self-hosted setups, ensure to switch the base URL to your local server's address as mentioned above.

### Example Usage with OpenAI Libraries

#### Python Example

```python
import openai

openai.api_key = 'anything'
openai.base_url = "http://localhost:3040/v1/"

completion = openai.chat.completions.create(
    model="gpt-3.5-turbo",
    messages=[
        {"role": "user", "content": "How do I list all files in a directory using Python?"},
    ],
)

print(completion.choices[0].message.content)
```

#### Node.js Example

```js
import OpenAI from 'openai';

const openai = new OpenAI({
	apiKey: "anything",
	baseURL: "http://localhost:3040/v1",
});

const chatCompletion = await openai.chat.completions.create({
  messages: [{ role: 'user', content: 'Say this is a test' }],
  model: 'gpt-3.5-turbo',
});

console.log(chatCompletion.choices[0].message.content);
```

## License

This project is under the AGPL-3.0 License. Refer to the [LICENSE](LICENSE) file for detailed information.