> For the complete documentation index, see [llms.txt](https://docs.tardis.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tardis.dev/readme.md).

# Welcome

Historical cryptocurrency market data from 50+ exchanges, with Python and Node.js clients for replay and direct real-time feeds.

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-cover data-type="image"></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Exchange Coverage</strong></td><td>Supported exchanges, symbols, channels and historical date ranges.</td><td><a href="https://2257279413-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LihqQrMLN4ia7KgxAzi%2Fuploads%2Fgit-blob-abf9d353e4613f1802df236477f4d021c82e6d92%2Fcard-exchanges.jpeg?alt=media">card-exchanges.jpeg</a></td><td><a href="/historical-data-details/overview.md">Overview</a></td></tr><tr><td><strong>Agents and AI</strong></td><td>Manage account access, subscriptions and Data API keys with an AI assistant.</td><td><a href="https://2257279413-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LihqQrMLN4ia7KgxAzi%2Fuploads%2Fgit-blob-f6bb02237971c68818d7cdc7d1f843a6d31f26f0%2Fcard-agents.jpeg?alt=media">card-agents.jpeg</a></td><td><a href="/agents-and-ai.md">Agents and AI</a></td></tr><tr><td><strong>Market Data API</strong></td><td>Access raw historical feeds over HTTP, or replay and stream with Python or Node.js.</td><td><a href="https://2257279413-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LihqQrMLN4ia7KgxAzi%2Fuploads%2Fgit-blob-e6731cf3c6dae1c06b11c0afd9abc611d00e551e%2Fcard-api.jpeg?alt=media">card-api.jpeg</a></td><td><a href="/api/quickstart.md">Quickstart</a></td></tr><tr><td><strong>Downloadable CSV Files</strong></td><td>Download tick-level trades, order book updates and other datasets.</td><td><a href="https://2257279413-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LihqQrMLN4ia7KgxAzi%2Fuploads%2Fgit-blob-b826333dae48074a97d659e774ebcd31e98370d7%2Fcard-csv.jpeg?alt=media">card-csv.jpeg</a></td><td><a href="/downloadable-csv-files/overview.md">Quickstart</a></td></tr></tbody></table>


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# Agent Instructions
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## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.tardis.dev/readme.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.