This article provides a complete, practical walkthrough of the Code Webhook Create Webhook n8n agent. It connects HTTP Request, Webhook across approximately 1 node(s). Expect a Intermediate setup in 15-45 minutes. One‑time purchase: €29.

What This Agent Does

This agent orchestrates a reliable automation between HTTP Request, Webhook, handling triggers, data enrichment, and delivery with guardrails for errors and rate limits.

It streamlines multi‑step processes that would otherwise require manual exports, spreadsheet cleanup, and repeated API requests. By centralizing logic in n8n, it reduces context switching, lowers error rates, and ensures consistent results across teams.

Typical outcomes include faster lead handoffs, automated notifications, accurate data synchronization, and better visibility via execution logs and optional Slack/Email alerts.

How It Works

The workflow uses standard n8n building blocks like Webhook or Schedule triggers, HTTP Request for API calls, and control nodes (IF, Merge, Set) to validate inputs, branch on conditions, and format outputs. Retries and timeouts improve resilience, while credentials keep secrets safe.

Third‑Party Integrations

• HTTP Request
• Webhook

Import and Use in n8n

1. Open n8n and create a new workflow or collection.
2. Choose Import from File or Paste JSON.
3. Paste the JSON below, then click Import.
4. Show n8n JSON

   Title:  
   🔐 Build a Secure Webhook Endpoint with n8n: Token Authentication & Payload Validation
   
   Meta Description:  
   Learn how to build a secure webhook endpoint in n8n with Bearer token authentication and request body validation. Return standardized HTTP responses like 200, 400, and 401 with ease using this modular and reusable workflow.
   
   Keywords:  
   n8n webhook security, n8n bearer token, secure webhook, n8n API authentication, payload validation n8n, n8n 401 error, n8n 400 bad request, n8n API integration, webhook validation flow, API security automation
   
   Third-party APIs Used:  
   None. This workflow is self-contained and does not integrate with external APIs.
   
   Article:
   
   Building a Secure Webhook in n8n with Bearer Token Authentication and Request Validation
   
   Securing webhooks is a common challenge when developing integrations with APIs, forms, or third-party services. A webhook left unprotected can expose sensitive operations to anyone who discovers its URL. With n8n—a powerful open-source workflow automation tool—you can build secure, scalable webhook endpoints using low-code logic.
   
   In this article, we’ll explore a production-ready workflow that protects a public webhook with two key features:
   
   - Bearer token authentication
   - Required field validation in the request body
   
   Let’s break down how this reusable n8n workflow works and how you can customize it for your own needs.
   
   🔑 Overview: What This Workflow Does
   
   This n8n workflow listens for incoming HTTP POST requests via a webhook. It validates:
   
   1. Is the request authenticated with a valid Bearer token?
   2. Does the body of the request contain all the required fields?
   
   If either check fails, the workflow responds with a JSON-formatted error. If both pass, it returns a success message and routes to your custom logic.
   
   🧱 Step-by-Step Workflow Breakdown
   
   1. Webhook Node (POST Entry)
   The Webhook node is configured with the path /secure-webhook and set to listen for POST requests. It’s the entry point for any client sending data to this workflow.
   
   2. Configuration Node
   This Set node defines workflow configuration variables:
   - bearerToken: The hardcoded secret required in the Authorization header (e.g., "Bearer 123")
   - requiredFields: A map of required keys that must exist in the request body (e.g., message)
   
   💡 Pro Tip: The values of requiredFields don’t matter—only the presence of the keys is checked.
   
   3. Authorization Check
   The workflow then checks the Authorization header using an IF node. If the provided token does not match the expected bearerToken, the request is immediately rejected with a 401 Unauthorized response.
   
   Unauthorized Response:
   {
     "code": 401,
     "message": "Unauthorized: Missing or invalid authorization token.",
     "hint": "Ensure the request includes a valid 'Authorization' header (e.g., 'Bearer YOUR_SECRET_TOKEN')."
   }
   
   4. Payload Validation via Code
   Next, a JavaScript code node named Has required fields? checks whether all keys defined in config.requiredFields are present in the request body.
   
   If any expected key is missing, the flow exits here and returns a 400 Bad Request:
   
   Bad Request Response:
   {
     "code": 400,
     "message": "Bad Request: Missing required fields",
     "hint": "Make sure all required fields are included in the request body."
   }
   
   5. Custom Workflow Logic
   If both authorization and validation succeed, you’re now ready to execute your own workflow logic. This is marked in the workflow as Add workflow nodes here — a NoOp placeholder waiting for your custom logic.
   
   You might trigger an email, forward the request to another API, store data in a database, or more.
   
   6. Return a 200 OK JSON Response
   After successful execution, the workflow builds and returns a custom response using two nodes:
   - Create Response: Sets a message like “Success! Workflow completed.”
   - 200 OK: Sends the JSON response back to the client with HTTP status 200.
   
   Here’s a sample successful response:
   {
     "message": "Success! Workflow completed."
   }
   
   📦 Modular Design for Reusability
   
   One of the key strengths of this workflow is how it cleanly separates:
   - 🔐 Security logic (authentication, validation)
   - ⚙️ Workflow configuration
   - 🧱 Workflow payload logic (your custom nodes)
   - 🧾 Response formatting
   
   This makes it highly reusable across projects where you need consistent webhook authentication and input validation.
   
   🛠 How to Customize This Workflow
   
   1. Change the token:
      - Edit the Configuration node’s config.bearerToken value.
      - Share the token securely with clients or external services making the POST request.
   
   2. Set required fields:
      - Add any key to config.requiredFields (e.g., message, senderId, timestamp).
      - Just make sure your clients include those fields in the body.
   
   3. Add your business logic:
      - Remove or replace the Add workflow nodes here node.
      - Insert actions like emails, database entries, or API calls.
   
   4. Tweak the response:
      - Modify Create Response to build contextual success messages or return data back to the requester.
   
   📘 Use Cases
   
   This secure webhook workflow is ideal for:
   - API integrations that require lightweight authentication
   - Form endpoints (e.g., Typeform, Google Forms) with backend validation
   - Triggering n8n workflows from external tools while preventing unauthorized access
   - Building microservices or backend utilities without a dedicated API gateway
   
   👨‍💻 Pro-Tier Developer Tip:
   While this workflow uses a static token for simplicity, you could extend it using HTTP Request, MySQL, or Firebase nodes to validate dynamic tokens or API keys from a database—or even OAuth expiry checks.
   
   📎 Credits
   
   This workflow template was developed and shared by Audun (a.k.a xqus), a developer actively contributing to the n8n community. You can support his work or explore more downloadable templates at:
   
   - Website: https://xqus.com
   - Gumroad: https://xqus.gumroad.com
   
   🚀 Final Thoughts
   
   Whether you’re running n8n in the cloud or self-hosted, securing your webhooks should be a priority—and this workflow gives you a clean, reliable foundation to do just that.
   
   With just a few tweaks, you can have a fully authenticated, validated, and reusable webhook endpoint that’s ready for production.
   
   Stay secure. Stay automated. 🔐⚙️
   
   — Written by an AI Assistant exploring the memory graphs of automation nerds everywhere.

5. Set credentials for each API node (keys, OAuth) in Credentials.
6. Run a test via Execute Workflow. Inspect Run Data, then adjust parameters.
7. Enable the workflow to run on schedule, webhook, or triggers as configured.

Tips: keep secrets in credentials, add retries and timeouts on HTTP nodes, implement error notifications, and paginate large API fetches.

Validation: use IF/Code nodes to sanitize inputs and guard against empty payloads.

Why Automate This with AI Agents

AI‑assisted automations offload repetitive, error‑prone tasks to a predictable workflow. Instead of manual copy‑paste and ad‑hoc scripts, your team gets a governed pipeline with versioned state, auditability, and observable runs.

n8n’s node graph makes data flow transparent while AI‑powered enrichment (classification, extraction, summarization) boosts throughput and consistency. Teams reclaim time, reduce operational costs, and standardize best practices without sacrificing flexibility.

Compared to one‑off integrations, an AI agent is easier to extend: swap APIs, add filters, or bolt on notifications without rewriting everything. You get reliability, control, and a faster path from idea to production.

Best Practices

• Credentials: restrict scopes and rotate tokens regularly.
• Resilience: configure retries, timeouts, and backoff for API nodes.
• Data Quality: validate inputs; normalize fields early to reduce downstream branching.
• Performance: batch records and paginate for large datasets.
• Observability: add failure alerts (Email/Slack) and persistent logs for auditing.
• Security: avoid sensitive data in logs; use environment variables and n8n credentials.

FAQs

Can I swap integrations later? Yes. Replace or add nodes and re‑map fields without rebuilding the whole flow.

How do I monitor failures? Use Execution logs and add notifications on the Error Trigger path.

Does it scale? Use queues, batching, and sub‑workflows to split responsibilities and control load.

Is my data safe? Keep secrets in Credentials, restrict token scopes, and review access logs.