# Coin Metrics Community Data

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Available to the community under the [Creative Commons](https://creativecommons.org/licenses/by-nc/4.0/) license.
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## Community Data Offering

**Coin Metrics Community Metrics**(Community [API](https://docs.coinmetrics.io/access-our-data/api), [Data Visualization](https://docs.coinmetrics.io/charting-tools/data-visualization)) is a subset of our Network Data Pro and Market Data Pro data available for free for community use.

**Atlas Community** (Community [API](https://docs.coinmetrics.io/api/v4/#tag/List-of-blockchain-entities), [Atlas Explorer](https://atlas.coinmetrics.io/)) is a limited history access to our Atlas data set for free use by the community. This is available for limited assets and 30 days of history.

**Reference Rates Community** (Community[ API](https://docs.coinmetrics.io/access-our-data/api),[ Data Visualization](https://docs.coinmetrics.io/charting-tools/data-visualization),[ Pro Charts](https://docs.coinmetrics.io/charting-tools/cmpro)) provides access to all of our reference rates with a limited amount of history for our more granular resolutions. This is available and limited to the last 7 data points.

For more info on our Community terms and offerings see our [Labs](https://coinmetrics.io/cm-labs/) page.

## Community Access Limits

The Community HTTP API root endpoint URL is `https://community-api.coinmetrics.io/v4`. API key is not required when accessing community endpoints.

## Rate limits

The community version of API has the limit of 10 requests per 6 seconds sliding window for an IP address.