OpnForm n8n Trigger (Community Node)

A custom n8n node that triggers workflows when new form submissions are received in OpnForm.

What is OpnForm?

OpnForm is an open-source form builder that allows you to create and manage forms, collect submissions, and integrate with various tools. This n8n integration enables you to automate workflows based on form submissions.

API Documentation: https://docs.opnform.com/api-reference/introduction

What this integration does

This n8n trigger node automatically receives OpnForm submissions as webhook events in your n8n workflows. When a form is submitted in OpnForm, the integration sends the submission data to your n8n workflow, allowing you to:

• Process form submissions automatically
• Integrate with other services and tools
• Transform and route submission data
• Trigger complex multi-step workflows

API Endpoints Used

This integration uses the following OpnForm API endpoints:

• GET /open/workspaces - Lists available workspaces for dropdown selection
• GET /open/workspaces/{workspaceId}/forms - Lists forms in a workspace for dropdown selection
• GET /open/forms/{formId}/integrations - Checks if an integration already exists
• POST /open/forms/{formId}/integrations - Creates a webhook integration subscription
• DELETE /open/forms/{formId}/integrations/{integrationId} - Removes the webhook integration

Install (local development)

# From this directory
npm install
npm run build

Then in your n8n instance, install this package or load it as a local custom node per n8n docs.

Release your node

To publish your node to npm, run the release command in your project directory:

n8n-node release

Or using npm:

npm run release

Before running the release command, you must be logged into npm:

npm login

When you run the release command, n8n-node will perform the following actions:

• Build the node
• Run lint checks against your files
• Update the changelog
• Create git tags
• Create a GitHub release
• Publish the package to npm

For more details, see the n8n-node release documentation.

Authentication

Creating a Personal Access Token

To use this integration, you need a Personal Access Token from OpnForm with the manage-integrations ability.

1. Sign in to your OpnForm account at https://opnform.com
2. Navigate to Settings → Access Tokens (/home?user-settings=access-tokens)
3. Click Create new token
4. Enter a descriptive name (e.g., "n8n Integration")
5. Select the manage-integrations ability (and any other abilities you need)
6. Click Create and copy the token immediately - you won't be able to see it again

For detailed instructions, see the OpnForm API Keys documentation.

Required Abilities

| Ability | Required For | | --------------------- | --------------------------------------------------------- | | manage-integrations | Required - Creating and managing webhook integrations | | workspaces-read | Required - Listing workspaces for dropdown selection | | forms-read | Required - Listing forms for dropdown selection |

Configuring Credentials in n8n

1. In your n8n workflow, add the OpnForm Trigger node
2. Click on Credentials and select Create New
3. Enter:
   • Name: OpnForm API (or any descriptive name)
   • Base URL: https://api.opnform.com (or your self-hosted OpnForm instance URL)
   • API Key: Your Personal Access Token
4. Click Save and select this credential in the OpnForm Trigger node

Usage Instructions

Setting Up the Trigger

1. Add the OpnForm Trigger node to your n8n workflow
2. Select your credentials (or create new ones as described above)
3. Choose a Workspace from the dropdown menu
4. Choose a Form from the dropdown menu (forms will load after selecting a workspace)
5. Activate the workflow - The node will automatically:
   • Create a webhook integration in OpnForm
   • Configure the webhook URL to receive submissions
   • Start listening for new form submissions

Workflow Activation

When you activate your n8n workflow:

• The OpnForm Trigger node will create a webhook integration subscription
• OpnForm will send a POST request to your n8n webhook URL whenever the form receives a submission
• The submission data will be available in subsequent workflow nodes

Workflow Deactivation

When you deactivate your n8n workflow:

• The OpnForm Trigger node will automatically delete the webhook integration
• No further submissions will be sent to your workflow

Example Workflows

Example 1: Send Form Submission to Slack

OpnForm Trigger → Set Node (format message) → Slack Node (send message)

Workflow Steps:

1. OpnForm Trigger - Receives form submission
2. Set Node - Format the submission data into a Slack-friendly message:

   {
   	"text": "New form submission received!",
   	"fields": [
   		{
   			"title": "From",
   			"value": "{{ $json.submitter_email }}",
   			"short": true
   		},
   		{
   			"title": "Submission ID",
   			"value": "{{ $json.id }}",
   			"short": true
   		}
   	]
   }

3. Slack Node - Send the formatted message to a Slack channel

Example 2: Save Submissions to Google Sheets

OpnForm Trigger → Transform Data → Google Sheets Node (append row)

Workflow Steps:

1. OpnForm Trigger - Receives form submission
2. Code Node - Transform submission data to match your Google Sheets columns:

   const submission = $input.item.json;
   return {
   	json: {
   		timestamp: submission.created_at,
   		email: submission.data.email || '',
   		name: submission.data.name || '',
   		message: submission.data.message || '',
   	},
   };

3. Google Sheets Node - Append the transformed data as a new row

Example 3: Conditional Email Notifications

OpnForm Trigger → IF Node (check condition) → Email Node (send notification)

Workflow Steps:

1. OpnForm Trigger - Receives form submission
2. IF Node - Check if submission meets certain criteria (e.g., {{ $json.data.urgency }} === 'high')
3. Email Node - Send an email notification only for high-priority submissions

How it works

1. Load Options: When configuring the node, it fetches Workspaces and Forms via /open/workspaces and /open/workspaces/{workspaceId}/forms to populate dropdown menus.
2. On Enable: The node subscribes by creating a form integration with integration_id: 'n8n' and your n8n webhook URL via POST /open/forms/{formId}/integrations.
3. On Disable: The node automatically deletes the created integration via DELETE /open/forms/{formId}/integrations/{integrationId}.
4. Webhook Receipt: When a form submission occurs, OpnForm sends the submission data to your n8n webhook URL, and the payload is forwarded as JSON to the workflow.

License

Licensed under the MIT License. See LICENSE for details.