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

# API Trigger node

> Launch a published or draft workflow from a public HTTP trigger without turning this page into an API reference.

Launch a published or draft workflow from a public HTTP trigger without turning this page into an API reference.

## Prerequisites

* A saved workflow draft.
* An API key created in the Console and a telephony configuration for outbound calls.

## Configure the trigger

1. Add an **API Trigger** node and choose a descriptive trigger path.
2. Keep the trigger enabled while testing; a disabled trigger returns not found.
3. Copy the test or production URL shown on the node.
4. Send a POST request with the required call destination and any initial context.
5. Use the test URL for draft verification, then use the production URL after publishing.

## Constraints and failure states

The trigger path is limited to 36 letters, numbers, hyphens, or underscores. Test mode runs the latest draft and falls back to the published agent when no draft exists; production runs the published agent. Requests require the `X-API-Key` header, and a selected telephony configuration must belong to the same organization.

## Protect your data

Keep the API key server-side. Send only the initial context needed for the call and never place a real key in browser code, logs, or documentation examples.

## Related

* [Editing a workflow](/voice-agent/editing-a-workflow)
* [Template variables](/voice-agent/template-variables)
* [Inbound telephony](/integrations/telephony/inbound)


## Related topics

- [Editing a workflow](/voice-agent/editing-a-workflow.md)
- [Add an agent to a website](/voice-agent/add-to-website.md)
- [Workflow fundamentals](/voice-agent/introduction.md)
- [HTTP tool configuration](/voice-agent/tools/http-api.md)
- [MCP connections](/integrations/mcp.md)