Secure API Endpoint with Bearer Token Authentication and Field Validation

A reusable and production-ready n8n workflow that secures public webhooks using **Bearer token authentication** and **dynamic request validation**. --- ## What It Does - **Verifies Bearer Token**: Compares the `Authorization` header with a configured secret token. - **Validates Required Fields**: Checks that all expected fields are present in the incoming request body. - **Returns Standardized JSON Responses**: - `401 Unauthorized` if token is missing or invalid - `400 Bad Request` if required fields are missing - `200 OK` with a custom success payload --- ## Who It's For - Developers exposing n8n workflows as APIs - No-code/low-code builders integrating with external forms or tools - Anyone needing simple authentication and validation on incoming webhooks --- ## Why Use It - **Secure**: Prevents unauthorized access to your public workflows - **Clean**: Centralized configuration for token and required fields - **Flexible**: Easy to extend and customize for any use case --- ## Setup Instructions 1. **Configure Values in the `Configuration` Node** - Set your secret token: `config.bearerToken = YOUR_TOKEN` - Define required request fields by key: Example: ``` config.requiredFields.message = true; config.requiredFields.email = true; ``` **Note**: Only the **keys** matter - values can be anything. 2. **Plug in Your Business Logic** Replace the `Add workflow nodes here` with your own logic. 3. **Customize the Success Response** Edit the `Create Response` node to shape your success payload. --- ## Use Cases - Securing public form submissions - Creating internal API endpoints - Validating data from external services --- Use this as a base for building secure, API-style workflows in n8n. --- **Hello! I'm [Audun / xqus](https://xqus.com)**. If my n8n workflows saved you time or sparked ideas, [consider sending a little support](https://donate.stripe.com/9AQ6ps6Kna3t8Vi28b) my way. It helps me keep building cool stuff and maybe grab a coffee along the way!