How do I transfer input JSON from one n8n workflow to another?

Below is one approach to achieving this integration:

1. Setup the Webhook in Workflow 2

   • Create a new workflow (Workflow 2) and add a Webhook node.
   • Configure the Webhook node:
     • Choose the HTTP method you want to use (e.g. POST).
     • Optionally, allow multiple HTTP methods if needed.
     • Copy the Webhook URL (you can use the test URL for development/testing).
   • Save and, if you're ready for production, activate the workflow so the production URL is registered.

2. Send JSON from Workflow 1 via an HTTP Request Node

   • In Workflow 1, add an HTTP Request node.

   • Set the Request Method to match the method configured in Workflow 2’s Webhook node (e.g. POST).

   • Paste the Webhook URL from Workflow 2 in the URL field.

   • In the Body Parameters (or JSON Body field), insert the JSON input you want to pass. For example:

     JSONCopied
     {
       "firstName": "John",
       "lastName": "Doe",
       "email": "john.doe@example.com"
     }

   • Ensure that the Content-Type header is set to application/json (if it isn’t set automatically).

3. Trigger the Workflow and Verify

   • When Workflow 1 runs, it will send the JSON input via the HTTP Request node to the Webhook URL in Workflow 2.
   • Workflow 2’s Webhook node will capture the incoming JSON payload. You can then process the data further in Workflow 2.

Additional Notes:

• When building and testing your workflows, use the Test URL provided by the Webhook node. The test URL lets you see the transmitted data in the editor UI.
• When you’re ready to go live, ensure that you activate Workflow 2 so that it uses the Production URL for handling incoming requests.
• If you need to pass or transform the data in a specific way, consider using expressions within the Webhook node or additional processing nodes in Workflow 2.

This setup allows you to effectively pass a JSON object from one workflow to another using an HTTP Request node and a Webhook node. For more detailed guidance, refer to the Webhook node documentation and workflow development guides on n8n.