This article provides a complete, practical walkthrough of the Code Webhook Automate 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: Building an OpenID Connect (OIDC) Client Flow with n8n: A No-Code Authentication Workflow
   
   Meta Description:
   Learn how to build a complete OpenID Connect (OIDC) client login flow using n8n. This step-by-step guide outlines user authentication using cookies, tokens, PKCE, and integration with identity providers like Keycloak.
   
   Keywords:
   n8n, OpenID Connect, OIDC, PKCE, OAuth2, Authentication Workflow, Identity Provider, Keycloak, no-code, access token, user info endpoint, webhook automation
   
   Third-Party APIs Used:
   
   - OpenID Connect Authorization Endpoint
   - OpenID Connect Token Endpoint
   - OpenID Connect UserInfo Endpoint (can be from any identity provider like Keycloak or Auth0)
   
   Article:
   
   —
   
   # Building an OpenID Connect (OIDC) Client Flow with n8n: A No-Code Authentication Workflow
   
   As modern applications adopt decentralized identity and single sign-on (SSO) patterns, implementing authentication workflows using OpenID Connect (OIDC) becomes increasingly essential. Fortunately, you don't always need to write code to get this working. With n8n, a powerful open-source automation platform, you can implement a fully functional client login flow using OIDC standards without leaving its visual interface.
   
   In this guide, we walk through a real n8n workflow that authenticates users via an identity provider (IdP) like Keycloak. We'll explore how this flow works under the hood—from capturing OAuth2 authorization codes to fetching user info with access tokens—and how PKCE is used to enhance security.
   
   ---
   
   ## What Is OIDC and Why Use It?
   
   OpenID Connect is an identity layer built on top of OAuth2. It provides a standardized way to authenticate users and retrieve their profile information. It’s wildly used across platforms like Google, Auth0, and Keycloak, allowing developers to avoid handling passwords directly.
   
   n8n’s visual workflow builder enables you to implement OIDC authentication through a series of HTTP requests and conditional nodes. Let’s break this down.
   
   ---
   
   ## Workflow Overview: Steps in the OIDC Login Flow
   
   The core objective of the workflow titled “OIDC client workflow” is to authenticate users and deliver a personalized welcome page once the user is verified. Here are the macro steps involved:
   
   ### 1. Webhook Entry Point
   
   The flow starts with a Webhook node, acting as an entry point into the system. This is what users will hit when they try to access the application. 
   
   The Webhook checks:
   
   - Query parameters for an authorization code (from OAuth2 redirect).
   - Cookies for existing access tokens.
   
   ### 2. Set Authorization Variables
   
   A “Set” node initializes critical configuration for OIDC, including:
   
   - auth_endpoint (authorization URL)
   - token_endpoint
   - userinfo_endpoint
   - client_id, client_secret
   - redirect_uri (should be the webhook URL itself)
   - scope ("openid")
   - a boolean to toggle PKCE usage
   
   This allows users to plug in settings from any OIDC-compliant provider like Keycloak.
   
   ### 3. Handle Authorization Code (Non-PKCE Mode)
   
   If the query string contains a code and PKCE is off, the workflow sends a POST request to the token endpoint using:
   
   - grant_type = authorization_code
   - client_id, client_secret
   - redirect_uri
   - code
   
   It then retrieves and stores the access_token.
   
   ### 4. PKCE Mode Login Form (Default)
   
   PKCE, short for Proof Key for Code Exchange, is enabled by default in this workflow. If there’s no token yet, and we’re in PKCE mode, the workflow serves a custom-built HTML login page.
   
   This HTML page does the following:
   
   - Generates a code verifier and challenge.
   - Initiates the OAuth2 flow with the auth_endpoint.
   - Automatically posts the acquired authorization code to exchange for an access token.
   - Stores the received access_token into a browser cookie.
   
   ### 5. Access Token Detection
   
   Using a Code node, the flow parses incoming cookies into a JavaScript object to extract the access token.
   
   Then an "IF" node checks if access_token exists. If it does, it proceeds to retrieve user info from the `userinfo_endpoint`.
   
   ### 6. Fetch User Information
   
   The HTTP Request node makes a call to the userinfo endpoint with the access token in the Authorization header.
   
   This step returns user profile information such as the user’s email, which is used for personalization.
   
   ### 7. Conditional Output
   
   Based on user info response:
   
   - If the user is valid, the flow renders and sends a "Welcome Page" with the user’s email.
   - If not, it redirects the user back to the login form.
   
   ---
   
   ## Quick Setup with Keycloak (Sticky Note Summary)
   
   The workflow includes in-editor sticky notes to guide users through configuring Keycloak. Here’s a condensed version:
   
   1. Open Keycloak Realm Settings → View OpenID Endpoint Configuration.
   2. Copy:
      - authorization_endpoint
      - token_endpoint
      - userinfo_endpoint
   3. Create a Keycloak client with Standard Flow enabled and Client Authentication disabled (for PKCE).
   4. Use the n8n Webhook URL as the redirect URI.
   5. Populate the “Set Variables” node in the workflow with this information.
   
   ---
   
   ## Why PKCE Matters
   
   PKCE enhances OAuth2 security by preventing authorization code injection attacks. This is particularly crucial when the client is a public web application (e.g., served in the browser), where you can't safely store secrets.
   
   ---
   
   ## Visual Customization
   
   The workflow includes well-designed HTML output nodes:
   
   - A stylized login form (with embedded JS logic for PKCE).
   - A cleanly formatted welcome page.
   
   This provides not just authentication but a user-friendly experience.
   
   ---
   
   ## Extending the Workflow
   
   Once authenticated, there’s unlimited potential to build post-login workflows. You can:
   
   - Store or process the user profile in a database.
   - Connect users to CRM systems.
   - Trigger business logic dynamically based on the profile.
   
   All within n8n—no code required.
   
   ---
   
   ## Final Thoughts
   
   OIDC authentication can be complex, involving redirects, tokens, and secure exchanges. But with n8n and this workflow template, the barrier is dramatically reduced. Whether you're testing identity flows or building production-ready SSO systems, this visual workflow gives you the foundation to handle modern logins—securely and easily.
   
   —
   
   Empower your automation with secure authentication. Get started by importing this workflow into n8n and visiting your webhook URL. Happy automating!

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.