The Workflow API lets you run workflows - specifically API workflows - on a POST request. By using such API workflows, you can create things, sign users up, send emails, and leverage plugins to access external services. Define the workflows as you would for a normal page, action by action. But, API workflows are one type of backend workflow, meaning they run independently of any page of your app and thus some actions (e.g. element-driven ones) are not available. Such an API workflow can return data, but for Read API calls, please use the Data API. You can create API workflows after checking the box 'Enable Workflow API and backend workflows' in the API section in the Settings Tab. These workflows are defined in the Backend workflows page found in the Application Menu above the Palette.
These are one type of backend workflow. Not only can they be initiated from elsewhere in the app, but notably they can also be initiated via an API call, if the app's Workflow API is enabled. The general path of the Workflow API for calling API workflows follows this pattern:
wf is for workflow.
Note that these two terms are similar but refer to slightly different things:
An "API workflow" is a type of workflow, specifically a type of backend workflow
The "Workflow API" refers to the app's ability to have API endpoints that run API workflows
This workflow is triggered on the server either when it is initiated from elsewhere in the app or via a call to the app's Workflow API. The workflow only runs after the authentication passes. As with other workflows, you can set up conditions to restrict when the workflow runs.
This is name of the API workflow and is also the URL endpoint (denoted as
workflow_name above). Each API workflow must have a unique name with no spaces or special characters.
Check this box to allow requests from outside the Bubble Editor via the Workflow API, either by a client that you built or another service, such as Stripe or Zapier. Non-public API workflows are useful because they can be initiated from elsewhere in the app or editor - for example, for scheduled workflows and bulk operations.
Check this box if this workflow can be run without authentication. Use this to enable users to sign up or login to the app.
An API workflow is run based on the token sent. All privacy rules will apply. Sometimes, you may want the workflow to bypass these rules, even if run without authentication, and run as an admin user who has all rights to the data. Check this box to ignore the privacy rules.
Warning: Because these are security and privacy options, use this feature with caution.
Parameters are the data the API workflow can accept. You can either list the different parameters one by one (Manual definition), or automatically detect the structure of the data when an external call hits the API workflow's endpoint. This type of detection is especially useful for webhooks.
Define which parameters the API workflow takes. Use this when you need to send data to Bubble's server, e.g., an email for signing the user up or information to create a new thing. This data should be set in the body of the POST request, except if you check the 'Querystring' box, in which case the parameter will be read from the URL as a querystring. Enter a key and define the data type. If this is a list, check 'Is a list/array.' If this parameter is optional, check 'Optional.' When a request is received, the Bubble workflow engine checks the validity of the data and returns a 400 error if the data is invalid. Note that if the parameter is set to 'Querystring', it will not be made available for scheduling actions, this feature should only be used if the service that hits the API requires to add the parameter in the URL. Access the value of the parameters in the subsequent actions of the workflows using the data source dropdown menu. You will see the parameters you defined at the top of the menu.
When the parameters are detected from an initialization request, you can include the request headers in the detected data if some important data is in them.
Click this button to enter the initialization mode. This will open a popup, which indicates that your app is ready to receive a POST request. You can then trigger a POST request to this API workflow's endpoint, adding
/initialize at the end of the URL. This request should include a sample of the data that should be sent when the webhook is functional. Until the request is detected, this popup should remain open. Once the request is detected, you'll be able to see the detected data and pick the data types (see below).
Once an API workflow has been initialized (see above), you can modify the data structure of the received object. You can ignore some keys, and modify the field type of each key, value to be able to use the data in subsequent actions.
The API can return a response as a JSON object, or redirect to a page in your app and return data as querystring. Using a 302 page redirect is useful when you call the API workflow from the browser.
By default, Bubble will return a 400 error if the condition you've set on the workflow is not met. Check this box to change this setting and return a 200 code instead. Use this when the API workflow is used in a webhook, and the emitting source expects a 200 code.
Pick here the page Bubble should redirect to at the end of the workflow. If the workflow returns data, it will be added as querystrings to the URL.
Pick here the page Bubble should redirect to at when the workflow fails. The statusCode and the message will be added to the URL as querystrings.
This action defines which data should be returned by the API Workflow.
Check this box to return a text instead of a JSON object.
Define the text to return. It can be dynamic using the Composer.
These are the keys and data types of the parameters that are returned. When the name and type of data are set, define the data you want to return. In the case of the Workflow API, we limit the size of lists to 50 entries. For a full list of data, please use the Data API that handles pagination.