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Prerequisites

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Workflow Overview

This n8n workflow consists of three main HTTP requests:
1

Submit Request

Send a POST request to initiate content generation
2

Check Status

Poll the status of your request using GET
3

Retrieve Result

Fetch the final generated content

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Step 1: Create Your Workflow

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In n8n, create a new workflow
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Start with a Manual Trigger node to initiate the workflow manually

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Step 2: Submit Request (POST)

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Add HTTP Request Node

1

Add an HTTP Request node after your trigger
2

Set the Method to POST

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Configure the URL

1

Navigate to fal.ai and select your desired model (e.g., fal-ai/veo3/fast)
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Click on the API tab, select “HTTP (cURL)” and “Submit a request”. Copy and save the URL and data JSON as those will be needed for later.
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Copy the URL (e.g., https://queue.fal.run/fal-ai/veo3/fast) and paste it into the URL field in n8n

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Set Up Authentication

1

Navigate to fal.ai API Keys, create a new key and copy its value.
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Back in n8n, in the Authentication section, select Generic Credential Type
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Choose Header Auth from the dropdown
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Click + Create new credential
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Set:
  • Name: Authorization
  • Value: Key YOUR_FAL_KEY
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Save the credential and close

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Configure Request Body

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Toggle Send Body to ON
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Set Body Content Type to JSON
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Choose Specify Body as USING JSON
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In fal, go again to the model page, select JSON from dropdown and copy the payload
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Copy the JSON payload and paste it into n8n’s JSON text box

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Execute the Node

1

Click Execute Node to test the request. You should receive a response with a request ID.

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Step 3: Check Status (GET)

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Add Second HTTP Request Node

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Click on the first HTTP Request node and add another HTTP Request node
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Set the Method to GET

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Configure Status Check URL

1

In fal, go to your model’s API section and find the GET URL for status checking
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Copy this URL and paste it into the URL field
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You’ll need to replace the request ID from the previous step on this URL, with {{ $json.request_id }}

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Set Authentication

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Use the same Header Auth credential created earlier
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Select your existing Authorization credential

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Execute the Node

  1. This will check the status of your generation request.

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Step 4: Retrieve Result (GET)

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Add Third HTTP Request Node

  1. Add a final HTTP Request node
  2. Set the Method to GET

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Configure Result URL

  1. Use the result URL provided in the status response by setting the URL to {{ $json.request_url }}

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Set Authentication

  1. Use the same Header Auth credential

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Execute the Node

This will retrieve your final generated content.

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Testing Your Workflow

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Save your workflow
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Click Execute Workflow to run the complete process
3

Monitor each node to ensure successful execution
4

Check the final node output for your generated content

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Best Practices

  • Error Handling: Add error handling nodes to manage failed requests
  • Delays: Consider adding Wait nodes between status checks to avoid overwhelming the API
  • Conditional Logic: Use IF nodes to check status before proceeding to result retrieval
  • Data Transformation: Use Set nodes to extract and format specific data from responses

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Troubleshooting

  • 401 Unauthorized: Check that your API key is correctly set in the authentication header
  • Request ID Missing: Ensure the first POST request completed successfully and returned a request ID
  • Status Still Processing: Add appropriate delays between status checks
  • Invalid JSON: Verify your JSON payload matches the model’s expected format

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Next Steps

Once you have a working workflow, you can:
  • Connect it to external triggers (webhooks, schedules, etc.)
  • Integrate with other services in your n8n workflow
  • Add data processing and transformation steps
  • Set up notifications for completed generations
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