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

# Triggers

> Reference documentation for every trigger available in WorkflowDog.

A trigger is the event that starts a workflow. It can react to an incoming HTTP
request, a schedule, a new message or booking, a form submission, or another
service event.

This reference documents every trigger currently available in the editor.
Browse by package in the navigation or search for the trigger by its node-picker
name.

## How trigger outputs work

When an event arrives, the trigger turns its data into outputs. Those outputs
are the starting values for the rest of the workflow—for example, an incoming
email's sender, an HTTP request body, or a scheduled execution time.

Some triggers change their outputs when you select a different event type or
configuration. Make that choice before connecting the trigger to later actions.

## Test before enabling

<Steps>
  <Step title="Configure the event">
    Select the account, event type, schedule, route, or other source settings
    documented for the trigger.
  </Step>

  <Step title="Generate a representative event">
    Send a test request or create a real service event so the workflow receives
    the same shape of data it will see in production.
  </Step>

  <Step title="Inspect the outputs">
    Confirm optional properties, files, and lists before relying on them in
    downstream actions.
  </Step>

  <Step title="Enable the workflow">
    Once the trigger and downstream actions behave as expected, enable the
    workflow so it can receive future events.
  </Step>
</Steps>

<Warning>
  External triggers depend on the connected account and the service's delivery
  behavior. Removing permissions, deleting a webhook or watch, or disabling the
  workflow can stop new events from arriving.
</Warning>

Need a step that runs after a trigger? Browse the complete
[Actions reference](/reference/actions).