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

# Overview

Build on Felt from your own code: put maps in your product, keep layers in sync with your data, or let an AI agent work in your workspace. Felt handles tiling, styling, refresh and permissions.

## What do you want to build?

Some of these need a specific plan or the Platform add-on, and every new workspace gets a free 7-day trial of all of them. See [Plans, access and limits](/plans-access-and-limits.md).

### Put a Felt map inside your product

Embed a map with the [JS SDK](/js-sdk/getting-started.md) and control it from your app: filters, viewport, styles, and events like clicks and selections. To show private maps without giving your users Felt accounts, use [authenticated embeds](/js-sdk/authenticated-embeds.md).

### Keep data in sync with your database or pipeline

Connect a [data source](/rest-api/api-reference.md) such as Postgres, Snowflake or BigQuery and Felt [refreshes it on a schedule](/rest-api/refreshing-live-data-layers.md#scheduled-refresh), or push files from your pipeline with the [REST API](/rest-api/uploading-files-and-urls.md).

### Automate Felt with the REST API

Create maps, upload and style layers, manage annotations and export data. Start with [Getting started](/rest-api/getting-started.md) or the [API reference](/rest-api/api-reference.md); Python users can use [`felt-python`](https://github.com/felt/felt-python). Use [webhooks](/rest-api/listening-to-updates-using-webhooks.md) to react when a map changes.

### Let an AI agent work in Felt

Connect Claude, ChatGPT, Cursor or VS Code to the [MCP server](/ai-agents-and-mcp.md) to build maps, style layers, run SQL and edit features.

### Style layers precisely

The [Felt Style Language](/felt-style-language/getting-started.md) (FSL) is the JSON behind every layer's style, legend, labels and popups.

### Customize maps from inside Felt

[Extensions](https://help.felt.com/dashboards-and-apps/extensions) run SDK code inside a Felt map, with nothing to host.

{% hint style="info" %}

#### Looking for Elements? They're now called Annotations.

The app and these docs say annotations, while the REST API and JS SDK keep the `elements` naming. See [Working with annotations](/rest-api/working-with-annotations.md) and [Drawing annotations](/js-sdk/drawing-annotations.md).
{% endhint %}


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