Package: coinmetrics-api-client
Coin Metrics Python API v4 client libraryThis is an official Python API client for Coin Metrics API v4.Installation and UpdatesTo install the client you can run the following command:pip install coinmetrics-api-clientNote that the client is updated regularly to reflect the changes made inAPI v4. Ensure that your latest version matches with what's inpyPITo update your version, run the following command:pip install coinmetrics-api-client -UIntroductionYou can use this client for querying all kinds of data with your API.To initialize the client you should use your API key, and the CoinMetricsClient class like the following.from coinmetrics.api_client import CoinMetricsClient

client = CoinMetricsClient("<cm_api_key>")

# or to use community API:
client = CoinMetricsClient()After that you can use the client object for getting information such as available market trades as a list of dictionaries:print(client.catalog_market_trades_v2().to_list())or to iterate over each page of data:fordatainclient.catalog_market_trades_v2():print(data)you can also use filters for the catalog endpoints like this:print(client.catalog_market_trades_v2(exchange="binance").to_list())All the catalog V2 endpoints meant to help access the historical data served by other endpoints. For example, you can
get all the BTC market trades for a certain day from binance like this:importosfromcoinmetrics.api_clientimportCoinMetricsClientclient=CoinMetricsClient(os.environ['CM_API_KEY'])btc_binance_markets=[market['market']formarketinclient.catalog_market_trades_v2(exchange="binance",asset="btc").to_list()]start_time="2023-01-01"end_time="2023-01-02"binance_market_trades=client.get_market_trades(markets=btc_binance_markets,start_time=start_time,end_time=end_time,page_size=1000).export_to_csv("binance_trades.csv")in this case you would get all the information markets that trade on binance only.You can use this client to connect to our API v4 and get catalog or timeseries data from python environment. It natively supports paging over the data so you can use it to iterate over timeseries entries seamlessly.The client can be used to query both pro and community data.The full list of methods can be found in theAPI Client Spec.If you'd like a more holistic view of what is offered from an API endpoint you can use theto_dataframe()function
associated with our catalog endpoints. The code snippet below shows getting a dataframe of information on all the
assets that data is provided for:print(client.catalog_market_metrics_v2(exchange="binance",page_size=1000).to_dataframe())Output:market                                            metrics
0       binance-1000BTTCUSDT-future  [{'metric': 'liquidity_depth_0_1_percent_ask_v...
1      binance-1000FLOKIUSDT-future  [{'metric': 'liquidations_reported_future_buy_...
2       binance-1000LUNCBUSD-future  [{'metric': 'liquidations_reported_future_buy_...
3       binance-1000LUNCUSDT-future  [{'metric': 'liquidations_reported_future_buy_...
4       binance-1000PEPEUSDT-future  [{'metric': 'liquidations_reported_future_buy_...Now you can use the pandas Dataframe functionality to do useful transformations, such as filtering out the assets
without metrics available, then saving that data to a csv file:importpandasaspdimportosfromcoinmetrics.api_clientimportCoinMetricsClientfromdatetimeimporttimedeltaclient=CoinMetricsClient(os.environ['CM_API_KEY'])binance_markets=client.catalog_market_trades_v2(exchange="binance",page_size=1000).to_dataframe()binance_markets['max_time']=pd.to_datetime(binance_markets['max_time'],utc=True)current_utc_time=pd.Timestamp.now(tz='UTC')one_day_ago=current_utc_time-timedelta(days=1)filtered_binance_markets=binance_markets[binance_markets['max_time']>one_day_ago]Parallel execution for faster data exportThere are times when it may be useful to pull in large amounts of data at once. The most effective way to do this
when calling the CoinMetrics API is to split your request into many different queries. This functionality is now
built into the API Client directly to allow for faster data export:importosfromcoinmetrics.api_clientimportCoinMetricsClientif__name__=='__main__':client=CoinMetricsClient(os.environ['CM_API_KEY'])binance_eth_markets=[market['market']formarketinclient.catalog_market_candles(exchange="binance",base="eth")]start_time="2022-03-01"end_time="2023-05-01"client.get_market_candles(markets=binance_eth_markets,start_time=start_time,end_time=end_time,page_size=1000).parallel().export_to_json_files()What this feature does is rather request all the data in one thread, it will split into many threads or processes and
either store them in separate files in the case of.parallel().export_to_csv_files()and.parallel().export_to_json_filesor combine them all into one file or data structure in the case of.parallel().to_list(),.parallel().to_dataframe(),.parallel().export_to_json(). It's important to know that in order to send more requests per second to the CoinMetrics
this uses theparallel tasks features in Python's concurrent.futurespackage. This means when using this feature, the API Client will use significantly more resources and may approach
theCoin Metrics rate limits.In terms of resource usage and speed, these usages are in order from most performant to least:.export_to_json_files().export_to_csv_files().to_list().export_to_json().to_dataframe()Splitting single parameter queries into many requests for increased performanceThere is a featuretime_incrementthat can be used to split a single query into many based on time range, and then
combine them later. Consider this example where we speed up getting a 2 months worth of BTC ReferenceRateUSD data into
many parallel threads to create a dataframe faster:importdatetimeimportosfromcoinmetrics.api_clientimportCoinMetricsClientfromdateutil.relativedeltaimportrelativedeltaclient=CoinMetricsClient(os.environ.get("CM_API_KEY"))start_time=datetime.datetime.now()assets=["btc","eth","algo"]if__name__=='__main__':client.get_asset_metrics(assets=assets,metrics="ReferenceRateUSD",frequency="1m",start_time="2022-03-01",end_time="2023-03-01",page_size=1000,end_inclusive=False).parallel(time_increment=relativedelta(months=1)).export_to_csv("btcRRs.csv")print(f"Time taken parallel:{datetime.datetime.now()-start_time}")start_time=datetime.datetime.now()client.get_asset_metrics(assets=assets,metrics="ReferenceRateUSD",frequency="1m",start_time="2022-03-01",end_time="2023-03-01",page_size=1000,end_inclusive=False).export_to_csv("btcRRsNormal.csv")Notice we pass in thetime_increment=relativedelta(months=1)so that means we will split the threads up by month, in
addition to by asset. So this will run a total 36 separate threads, 12 threads for each month x 3 threads for each asset.
The difference it takes in time is dramatic:Exporting to dataframe type: 100%|██████████| 36/36 [00:00<00:00, 54.62it/s]
Time taken parallel: 0:00:36.654147
Time taken normal: 0:05:20.073826Please note that for short time periods you can pass in atime_incrementwithdatetime.timedeltato specify up to
several weeks, for larger time frames you can usedateutil.relativedelta.relativedeltain order to split requests
up by increments of months or years.To keep in mind when using using parallel feature or generally writing high performance code using API Client:If you are using a smallpage_sizeand trying to export a large number amount of, this will be your biggest bottleneck.
Generally the fastestpage_sizeis1000to10000If you are unsure why an action is taking a long time, running the CoinMetricsClient usingverbose=Trueordebug=Truecan give better insight into what is happening under the hoodThe parallel feature is best used when you are exporting a large amount of data, that can be split by query params into
many smaller requests. A good example of this is market candles over a long time frame - if you are querying hundreds
of markets and are sure there will be data, using.parallel().export_to_csv_files("...")can have a huge performance
increase, if you are just querying a single market you will not see a differenceThe parallel feature is highly configurable, there is several configuration options that may be suitable for advanced
users like tweaking themax_workersparameter, or changing the defaultProcessPoolExecutorto aThreadPoolExectuorUsing multithreaded code is inherently more complex, it will be harder to debug issues with long running queries
when running parallel exports compared to normal single threaded codeFor that reason, this tool is best suited for exporting historical data rather than supporting a real time production
systemThe methods that create separate files for each thread will be the safest and most performant to use -.export_to_csv_files()and.export_to_json_files(). Using the methods that return a single output -.export_to_csv(),export_to_list(), and.export_to_dataframe()need to join the data from many threads before it can be returned, this may use a lot of memory
if you are accessing data types like market orderbooks or market trades and could fail altogetherIf you get the errorBrokenProcessPoolitmight be because you're missing a main() functionExamplesThe API Client allows you to chain together workflows for importing, transforming, then exporting Coin Metrics data.
Below are examples of common use-cases that can be altered to tailor your specific needs. In addition to the examples
listed below, there's examples covering all the API methods, found in theexamples directory.Example Notebookswalkthrough_community.ipynb: Walks through the basic functionality available using the community client.Asset Metricsbbb_metrics_csv_exporter_using_plain_requests.py: Queries block-by-block metrics using therequestslibrary and exports the output into a CSV file.bbb_metrics_json_exporter.py: Queries block-by-block metrics and exports the output into a JSON file.eod_metrics_csv_exporter.py: Exports a set of user-defined metrics and assets published at end-of-day and exports the output into a CSV file.reference_rates_json_exporter.py: Queries Coin Metrics Reference Rates at a user-defined frequency for a set of assets, then exports the output into a JSON file.Market Databooks_json_exporter.py: Queries market orderbook data then exports the output into a JSON file.candles_json_exporter.py: Queries market candles data then exports the output into a JSON file.funding_rates_json_exporter.py: Queries market funding rates data then exports the output into a JSON file.trades_csv_exporter.py: Queries market trades data then exports the output into a CSV file.trades_json_exporter.py: Queries market trades data then exports the output into a JSON file.**Parallel processing exportscandles_csv_export.py: Exports market candles in parallel to many separate csv filescandles_json_export.py: Exports market candles in parallel to many separate json filesmarket_trades_list.py: Creates a list of market trades, using.parallel()feature to improve performancemarket_orderbooks.py: Exports market orderbooks to many csv filescandles_csv_export_manual.py: Example of parallelism using the API Client without using the.parallel()featurebtc_1m_metrics_export.py: Example of splitting a large request for asset metrics by metric to improve performance, exporting a
single csv and also separate csv.market_orderbooks_csv_exporter_by_day.py: Example of splitting a market orderbook export up by day, to increase
export performanceGetting timeseries dataFor getting timeseries data you want to use methods of the client class that start withget_. It's important to note
that the timeseries endpoints return data of a parent class typeDataCollection. TheDataCollectionclass is meant
to support a variety of different data export and data manipulation use cases, so just calling one of the client
methods such asdata = client.get_market_trades(markets="coinbase-btc-usd-spot")will not actually retrieve the data related
to this API call. You must then call a function on thisDataCollectionsuch asdata.export_to_csv("coinbase_btc_usd_spot_trades.csv)ordata.to_dataframe()in order to access the data. There is more explicit examples below.If you are curious to see
how the API calls are being made and with what parameters, instantiating the client with theverboseargument likeCoinMetricsClient(api_key=<YOUR_API_KEY>, verbose=True)will print the API calls as well as information on performance to console.For example if you want to get a bunch of market data trades for coinbase btc-usd pair you can run something similar to the following:for trade in client.get_market_trades(
    markets='coinbase-btc-usd-spot', 
    start_time='2020-01-01', 
    end_time='2020-01-03',
    limit_per_market=10
):
    print(trade)This example uses theDataCollectionas a Python iterator, so with each iteration of the Python for loop it will
call the Coin Metrics API and return data. The defaultpage_sizefor calls to the API is 100, so each call will return
100 trades until it reaches the end of the query. To get more trades in each API call, you can add the parameterpage_sizeto the.get_market_trades()method call, up to a maximum of 10000.Or if you want to see daily btc asset metrics you can use something like this:for metric_data in client.get_asset_metrics(assets='btc', 
                                            metrics=['ReferenceRateUSD', 'BlkHgt', 'AdrActCnt',  
                                                     'AdrActRecCnt', 'FlowOutBFXUSD'], 
                                            frequency='1d',
                                            limit_per_asset=10):
    print(metric_data)This will print you the requested metrics for all the days where we have any of the metrics present.DataFrames(New in >=2021.9.30.14.30)Timeseries data can be transformed into a pandas dataframe by using theto_dataframe()method. The code snippet below shows how:import pandas as pd
from coinmetrics.api_client import CoinMetricsClient
from os import environ

client = CoinMetricsClient()
trades = client.get_market_trades(
    markets='coinbase-btc-usd-spot', 
    start_time='2021-09-19T00:00:00Z', 
    limit_per_market=10
)
trades_df = trades.to_dataframe()
print(trades_df.head())If you want to use dataframes, then you will need to install pandasNotesThis only works with requests that return the typeDataCollection. Thus,catalogrequests, which return lists cannot be returned as dataframes.
Please see theAPI Client Specfor a full list
of requests and their return types.API restrictions apply. Some requests may return empty results due to limited access to the API from you API key.Type Conversion(New in >=2021.12.17.18.00)As of version2021.12.17.18.00or later, outputs from theto_dataframefunction automatically convert the dtypes for a dataframe to the optimal pandas types.metrics_list=['volume_trusted_spot_usd_1d','SplyFF','AdrBalUSD1Cnt']asset_list=['btc','xmr']start_time='2021-12-01'df_metrics=client.get_asset_metrics(assets=asset_list,metrics=metrics_list,start_time=start_time,limit_per_asset=3).to_dataframe()print(df_metrics.dtypes)asset                          string
time                           datetime64[ns, tzutc()]
AdrBalUSD1Cnt                   Int64
SplyFF                        Float64
volume_trusted_spot_usd_1d    Float64
dtype: objectThis can be turned off by settingoptimize_pandas_types=FalseAlternatively, you can manually enter your own type conversion by passing in a dictionary fordtype_mapper. This can be done in conjunction with pandas' built in type optimizations.mapper={'SplyFF':'Float64','AdrBalUSD1Cnt':'Int64',}df_mapped=client.get_asset_metrics(assets=asset_list,metrics=metrics_list,start_time=start_time,limit_per_asset=3).to_dataframe(dtype_mapper=mapper,optimize_pandas_types=True)print(df_mapped.dtypes)asset                                          object
time                          datetime64[ns, tzutc()]
AdrBalUSD1Cnt                                   Int64
SplyFF                                        Float64
volume_trusted_spot_usd_1d                    float64
dtype: objectOr as strictly the only types in the dataframedtype_mapper={'ReferenceRateUSD':np.float64,'time':np.datetime64}df=client.get_asset_metrics(assets='btc',metrics='ReferenceRateUSD',start_time='2022-06-15',limit_per_asset=1).to_dataframe(dtype_mapper=dtype_mapper,optimize_pandas_types=False)df.info()RangeIndex: 1 entries, 0 to 0
Data columns (total 3 columns):
 #   Column            Non-Null Count  Dtype         
---  ------            --------------  -----         
 0   asset             1 non-null      object        
 1   time              1 non-null      datetime64[ns]
 2   ReferenceRateUSD  1 non-null      float64       
dtypes: datetime64[ns](1), float64(1), object(1)
memory usage: 152.0+ bytesNote that in order to pass a custom datetime object, setting a dtype_mapper is mandatory.Pandas type conversion tends to be more performant. But if there are custom operations that must be done using numpy datatypes, this option will let you perform them.Exporting to csv and json files:You can also easily export timeseries data to csv and json files with builtin functions on theDataCollectiontype.
For example this script will export Coinbase btc and eth trades for a date to csv and json files respectively:start_date=datetime.date(year=2022,month=1,day=1)end_date=datetime.datetime(year=2022,month=1,day=1)market_trades_btc=client.get_market_trades(page_size=1000,markets="coinbase-btc-usd-spot",start_time=start_date,end_time=end_date)market_trades_btc.export_to_csv("jan_1_2022_coinbase_btc_trades.csv")market_trades_eth=client.get_market_trades(page_size=1000,markets="coinbase-eth-usd-spot",start_time=start_date,end_time=end_date)market_trades_eth.export_to_json("jan_1_2022_coinbase_eth.json")PagingYou can make the datapoints to iterate from start (default) or from end.for that you should use a paging_from argument like the following:from coinmetrics.api_client import CoinMetricsClient
from coinmetrics.constants import PagingFrom

client = CoinMetricsClient()

for metric_data in client.get_asset_metrics(assets='btc', metrics=['ReferenceRateUSD'],
                                            paging_from=PagingFrom.START):
    print(metric_data)PagingFrom.END: is available but by default it will page from the start.Debugging the API ClientThere are two additional options for the API Client -debug_modeandverbose. These two options log network calls
to the console, and in the case ofdebug_modeit will generate a log file of all the network requests and the time
it takes to call them. These tools can be used to diagnose issues in your code and also to get a better understanding
of request times so that users can write more performant code. For example, running the below code:importosfromcoinmetrics.api_clientimportCoinMetricsClientapi_key=os.environ['CM_API_KEY']if__name__=='__main__':client=CoinMetricsClient(api_key=api_key,debug_mode=True)reference_rates_example=client.get_asset_metrics(assets=['btc','algo','eth'],metrics=['ReferenceRateUSD'])fordatainreference_rates_example:continueThe console output will look like:[DEBUG] 2023-01-09 11:01:02,044 - Starting API Client debugging session. logging to stdout and cm_api_client_debug_2023_01_09_11_01_02.txt
[DEBUG] 2023-01-09 11:01:02,044 - Using coinmetrics version 2022.11.14.16
[DEBUG] 2023-01-09 11:01:02,044 - Current state of API Client, excluding API KEY: {'_verify_ssl_certs': True, '_api_base_url': 'https://api.coinmetrics.io/v4', '_ws_api_base_url': 'wss://api.coinmetrics.io/v4', '_http_header': {'Api-Client-Version': '2022.11.14.16'}, '_proxies': {'http': None, 'https': None}, 'debug_mode': True, 'verbose': False}
[DEBUG] 2023-01-09 11:01:02,044 - Attempting to call url: timeseries/asset-metrics with params: {'assets': ['btc', 'algo', 'eth'], 'metrics': ['ReferenceRateUSD'], 'frequency': None, 'page_size': None, 'paging_from': 'start', 'start_time': None, 'end_time': None, 'start_height': None, 'end_height': None, 'start_inclusive': None, 'end_inclusive': None, 'timezone': None, 'sort': None, 'limit_per_asset': None}
[DEBUG] 2023-01-09 11:01:02,387 - Response status code: 200 for url: https://api.coinmetrics.io/v4/timeseries/asset-metrics?api_key=[REDACTED]&assets=btc%2Calgo%2Ceth&metrics=ReferenceRateUSD&paging_from=start took: 0:00:00.342874 response body size (bytes): 9832
[DEBUG] 2023-01-09 11:01:02,388 - Attempting to call url: timeseries/asset-metrics with params: {'assets': ['btc', 'algo', 'eth'], 'metrics': ['ReferenceRateUSD'], 'frequency': None, 'page_size': None, 'paging_from': 'start', 'start_time': None, 'end_time': None, 'start_height': None, 'end_height': None, 'start_inclusive': None, 'end_inclusive': None, 'timezone': None, 'sort': None, 'limit_per_asset': None, 'next_page_token': '0.MjAxOS0wOS0zMFQwMDowMDowMFo'}
[DEBUG] 2023-01-09 11:01:02,559 - Response status code: 200 for url: https://api.coinmetrics.io/v4/timeseries/asset-metrics?api_key=[REDACTED]&assets=btc%2Calgo%2Ceth&metrics=ReferenceRateUSD&paging_from=start&next_page_token=0.MjAxOS0wOS0zMFQwMDowMDowMFo took: 0:00:00.171487 response body size (bytes): 9857Then it can be easier to understand what network calls the API Client is making, and where any issues may exist. If you
wish to dig even deeper, you may consider modifying the_send_request()method of the API Client to log additional
data about the state of your environment, or anything else that would help diagnose issues. You will notice a log file
generated in the formatcm_api_client_debug_2023_01_09_11_01_02.txt. This log file might be helpful for your own use
or to give more context if you are working with Coin Metrics customer success.SSL Certs verificationSometimes your organization network have special rules on SSL certs verification and in this case you might face the
following error when running the script:SSLError: HTTPSConnectionPool(host='api.coinmetrics.io', port=443): Max retries exceeded with url: <some_url_path> (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1123)')))In this case, you can pass an option during client initialization to disable ssl verification for requests like this:client=CoinMetricsClient(verify_ssl_certs=False)We don't recommend setting it to False by default and you should make sure you understand the security risks of disabling SSL certs verification.Additionally, you may choose to specify the path to the SSL certificates on your machine. This may cause errors where
Python is unable to locate the certificates on your machine, particularly when using Python virtual environments.fromcoinmetrics.api_clientimportCoinMetricsClientSSL_CERT_LOCATION='/Users/<USER_NAME>/Library/Python/3.8/lib/python/site-packages/certifi/cacert.pem'client=CoinMetricsClient(verify_ssl_certs=SSL_CERT_LOCATION)A quick way to find the certs on your machine is:python3 -c "import requests; print(requests.certs.where())"And note that this will change based on whether or not you are using aPython virtual environment or notInstalling and running coinmetrics package and other python packages behind a secure python networkRelated to SSL Certs verification, you may have trouble installing and updating PyPi packages to your local environment.
So you may need to choose the best solution for your company and environment - either using package managers or
installing offline.Installing using package managersFull instructions for setting up your environment to use conda, pip, yarn, npm, etc. can befound here.
Additionally, a workaround to disable SSL verification when installing a trusted Python package is this:pip install --trusted-host pypi.python.org <packagename>Although it is important to make sure you understand the risks associated with disabling SSL verification and ensure
compliance with company policies.Installing Python packages locally/ offlineIt may be easier to download and install the package locally. Steps:Download the files for theCoin Metrics API Client from PyPiInstall it locallyRequests ProxySometimes your organization has special rules on making requests to third parties and you have to use proxies in order to comply with the rules.For proxies that don't require auth you can specify them similar to this example:client=CoinMetricsClient(proxy_url=f'http://<hostname>:<port>')For proxies that require auth, you should be able to specify username and password similar to this example:client=CoinMetricsClient(proxy_url=f'http://<username>:<password>@<hostname>:<port>')Extended documentationFor more information about the available methods in the client please referenceAPI Client Spec