> For the complete documentation index, see [llms.txt](https://docs.multimarkets.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.multimarkets.org/client-api/market-data/query.md).

# Query

- [Heartbeat](https://docs.multimarkets.org/client-api/market-data/query/heartbeat.md)
- [Historical K-line](https://docs.multimarkets.org/client-api/market-data/query/historical-k-line.md)