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

# Custom API Call

> Define reusable API tools your PulsyAI voice agent can invoke during a call — with full control over HTTP method, headers, and JSON Schema for the request body.

A Custom API Call is a reusable API tool your PulsyAI voice agent can invoke during a call to send or fetch data from any HTTP endpoint.

<Note>
  This setup guide is being expanded with a complete step-by-step walkthrough, screenshots, troubleshooting tips, and real-world examples. For current configuration fields and the in-product modal, see the [Integrations overview](/platform/integrations).
</Note>