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

# Reference

The contracts behind CARTO for Developers: every option of the libraries you build with, the files and limits of the platform features you deploy to, and the HTTP APIs underneath them all.

| Section                                                                    | Contents                                                                                                       |
| -------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------- |
| [Data Sources](/carto-for-developers/reference/data-sources.md)            | Every source function for vector, H3, Quadbin, raster and boundary data, with all of its options.              |
| [Widgets](/carto-for-developers/reference/carto-widgets-reference.md)      | The widget models, their parameters, and server-side versus client-side calculation.                           |
| [Filters](/carto-for-developers/reference/filters.md)                      | Column and spatial filters, and how they combine.                                                              |
| [fetchMap](/carto-for-developers/reference/fetchmap.md)                    | Loading a CARTO Builder map into your own application.                                                         |
| [@carto/agentic-deckgl](/carto-for-developers/reference/agentic-deckgl.md) | Tool definitions, system prompts and SDK converters for AI-powered map applications.                           |
| [Hosted Apps](/carto-for-developers/reference/hosted-apps.md)              | The `carto.json` manifest, the runtime contract, and the bundle rules and limits for apps CARTO hosts for you. |
| [CARTO API Reference](/carto-for-developers/reference/carto-api.md)        | The Maps, SQL, Tokens, Imports, Exports, LDS, Named Sources, Resources and Activity Data APIs.                 |


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