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

# Zapier API reference: OpenAPI specs, endpoints, and schemas

> API reference documentation served from api.zapier.com. Covers OpenAPI specifications, interactive playground, browsable endpoints, and authentication.

This is the unified API reference for Zapier's public APIs served from
`https://api.zapier.com`. Select an API in the sidebar to browse its endpoints,
schemas, authentication, and an interactive playground, all generated from the
API's OpenAPI spec.

## Authentication

All Zapier public APIs are served from `https://api.zapier.com`. Most use OAuth 2.0:
pass your access token in the `Authorization: Bearer <token>` header on every request.
Some Workflow API endpoints use Client ID authentication instead.

## Using the reference

Each API in the sidebar includes an interactive playground where you can make live
requests. Select an endpoint, fill in the parameters, and run it directly from the browser.

## Not sure which API to use?

| If you want to... | Start here |
| - | - |
| Receive real-time events from Zapier | [Trigger Inbox API](/api-reference/trigger-inbox) |
| Run stored actions programmatically | [Actions API](/api-reference/actions) |
| Get notified when app connections expire | [Connections API](/api-reference/connections) |
| Embed Zaps and workflows | [Workflow API](/api-reference/workflow) |

## For AI agents

Each API's spec is available in machine-readable form:

* **OpenAPI specs** are served at `/api-reference/specs/<api-name>.yaml`
  (for example, [`trigger-inbox.yaml`](/api-reference/specs/trigger-inbox.yaml)).
* **Markdown** for any page is available by appending `.md` to its URL.
* This site publishes [`llms.txt`](/llms.txt).
* **API catalog** at `https://zapier.com/.well-known/api-catalog` is a
  machine-readable [RFC 9727](https://www.rfc-editor.org/rfc/rfc9727) index that
  links Zapier's public APIs to their machine-readable specs and docs.