> ## Documentation Index
> Fetch the complete documentation index at: https://docs.meridian.surf/llms.txt
> Use this file to discover all available pages before exploring further.

# API & Third Party

> Action blocks for api & third party in the Meridian builder.

Call external HTTP APIs or LLM providers. Bring your own keys for AI; responses land in flow variables.

Categories mirror the builder block palette. Search the palette or use the links below to jump to a specific block.

## Blocks

* [API](/builder/action-blocks/api-and-third-party/api-request) — Make HTTP or third-party API requests from your flow.
* [Ask AI](/builder/action-blocks/api-and-third-party/ask-ai) — Send a prompt to an AI model using your own API key.