Use webhook triggers

Webhook triggers are an effective way to kick off a workflow with context from external systems. By sending an API request to a webhook trigger, Rewst will fire the workflow and include any data and/or queries included in the request.

Create the workflow

In the Rewst platform:

1. Navigate to Workflows > Create.

2. Enter a workflow name, like My First Webhook Trigger.

3. Click Submit to proceed to a blank workflow creation screen.

4. Add a single no-op action to the canvas. Name it BEGIN

5. Click Publish to save your workflow. No other actions are needed, as you'll just be working with triggers.

6. Click Add Trigger at the top of your workflow builder.

Create the trigger

1. Name your trigger.

2. Toggle Enable on.

3. Choose the trigger type Core - Webhook.

Set trigger parameters

The following parameters are available for editing:

• Allowed Methods

  • Used to define which HTTP request method is accepted by the trigger. Attempting to send a request with a method not in this list will result in an error

• Include Raw Body

  • Whether to include the raw string sent in the request body in the results as raw_body

• Response Body

  • Content to return in response body. {{ REQUEST }} may be used to access request data.

• Response Headers

  • HTTP headers to include in response. {{ REQUEST }} may be used to access request data.

  • TIP: Set your content type here if returning a specific format of data, such as text\html

• Response Status

  • HTTP status to return in response. {{ REQUEST }} may be used to access request data.

• Secret Key

  • Required to Wait For Results. This value must be included in the header as x-rewst-secret when making calls to this webhook. You will receive a 401 if this field is filled out and the secret key is not provided when making the request. Secrets can be defined in the Organization Variables section of the UI

• Wait for Results

  • If true, calls to the trigger endpoint will redirect to a results endpoint that will return the output of the workflow.

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Access data in a webhook trigger request

When a webhook receives a request, it will include data received in the following schema:

{
    body:{},
    headers:{},
    method:"",
    params:{},
    timestamp:""
}

Data can then be pulled from this as context variables. For example, to access the value for test sent to the webhook as:

{
    "test": "Hello, World!"
}

The value can be accessed at {{ CTX.body.test }}.

Similarly, if a URL parameter is sent as ?test=Hello, this can be accessed at {{ CTX.params.test }}

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Anatomy of a webhook URL

Webhook URLs are formatted consistently using the trigger ID and organization ID. The format is as follows: https://engine.rewst.io/webhooks/custom/trigger/{{ Trigger ID }}/{{ Organization ID }}

Using this information, you can craft webhook links on the fly for organizations a webhook trigger is enabled for. This may be useful for invoking certain workflows using links in a PSA ticket note or email, for example