# Page Not Found

The URL `api-data-types` does not exist.

You might be looking for one of these pages:
- [Packages](https://gitbook-docs.coinmetrics.io/packages.md)
- [Index Overview](https://gitbook-docs.coinmetrics.io/index-data/index.md)
- [Tutorials and Examples](https://gitbook-docs.coinmetrics.io/tutorials-and-examples.md)
- [Market Data Overview](https://gitbook-docs.coinmetrics.io/market-data/market-data-overview.md)
- [Fact Sheets](https://gitbook-docs.coinmetrics.io/index-data/fact-sheets.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://gitbook-docs.coinmetrics.io/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://gitbook-docs.coinmetrics.io/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/packages.md`)
- Use `Accept: text/markdown` header for content negotiation