# JSON API

This section provides information on the HTTP API for TvHeadend. It was written from the source code of the development version 4.3.

The examples shown were mostly generated from UK Freeview DVB-T / DVB-T2 and Freesat DVB-S / DVB-S2, using a single tuner in each case. Other sources and multiple input devices may give different results.

#### CAUTION

This API is an advanced feature of TVheadend, and the functionality is unstable and liable to change. The software does not completely validate its inputs and incorrect or unexpected calls may result in undesired behaviour.


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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.tvheadend.org/documentation/development/json-api.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.