# Welcome

<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>Detailed per-exchange data coverage — available symbols, channels, date ranges and collection details.</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">overview</a></td></tr><tr><td><strong>Downloadable CSV files</strong></td><td>Historical tick-level market data in normalized CSV format — trades, order books, derivatives and more.</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">overview</a></td></tr><tr><td><strong>Market data API</strong></td><td>Replay historical data or stream real-time feeds via Python, Node.js, HTTP API or tardis-machine server.</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">quickstart</a></td></tr><tr><td><strong>FAQ</strong></td><td>Common questions about data types, order books, billing, subscriptions and more.</td><td><a href="https://2257279413-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LihqQrMLN4ia7KgxAzi%2Fuploads%2Fgit-blob-ece7031a82b140a01b55713a31056aa997cb71bf%2Fcard-faq.jpeg?alt=media">card-faq.jpeg</a></td><td><a href="faq/general">general</a></td></tr></tbody></table>


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# Agent Instructions: 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:

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

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

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.