> ## 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.

# Changelog

> Updates for Zapier API reference docs and developer-facing features

Follow this page for Zapier API releases, reference updates, and developer-facing changes.

<Update label="July 6, 2026: Authentication deletion reference" tags={["Authentication", "API Reference"]}>
  Added API reference documentation for deleting app authentications.

  Use this endpoint when your product needs to remove a user's saved app authentication as part of account cleanup, disconnect flows, or authorization management.
</Update>

<Update label="June 29, 2026: Actions reference" tags={["Actions", "API Reference"]}>
  Added Zapier API reference docs for managing stored actions and running those actions through the API.

  The reference covers creating, listing, retrieving, updating, and deleting stored actions, plus creating and retrieving stored action runs.
</Update>

<Update label="June 26, 2026: Trigger Inbox guides" tags={["Triggers", "Guides"]}>
  Added guides for setting up trigger inboxes with the Zapier API.

  The new docs explain how Trigger Inbox works, how to create an inbox, consume messages, manage inbox settings, and handle common errors.
</Update>

<Update label="June 23, 2026: Trigger Inbox reference refresh" tags={["Triggers", "API Reference"]}>
  Refreshed the Zapier API reference for trigger inboxes from the latest OpenAPI spec.

  The generated reference now reflects the current schema for inbox and message operations.
</Update>

<Update label="May 22, 2026: Action run callbacks" tags={["Actions", "Guides"]}>
  Added docs for [action run callbacks](/powered-by-zapier/running-actions/action-run-callbacks), so your app can receive action results without polling.

  The guide covers the optional `callback_url` field, callback payloads, signature verification, retry behavior, and polling fallback.
</Update>