This article provides a complete, practical walkthrough of the Code Http Send 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:  
   Automating Voice and Email Verification Using n8n with ClickSend API
   
   Meta Description:  
   Learn how to automate text-to-speech (TTS) voice calls and email verification with n8n using ClickSend and SMTP. A step-by-step workflow to build secure two-factor identity validation.
   
   Keywords:  
   n8n workflow, text-to-speech automation, voice call verification, email verification, ClickSend API, email SMTP automation, phone number verification, two-factor authentication, TTS voice API, no-code automation
   
   Third-Party APIs Used:
   
   1. ClickSend API – for sending voice calls with text-to-speech capabilities.
   2. SMTP – to deliver email verification messages.
   
   Article:
   
   Power Your Verification Workflow with Voice and Email Automation Using n8n
   
   As identity verification grows increasingly vital for secure digital interactions, businesses and developers are exploring ways to implement multifactor authentication methods that are both effective and user-friendly.
   
   Enter the n8n automation platform — a powerful, no-code/low-code tool that integrates easily with external APIs and communication systems. In this article, we explore a workflow that enables dual verification through both voice calls and email, using the ClickSend API for voice and SMTP for email communication.
   
   This automated process is reliable, fast, and ideal for verifying user identity in contexts like registration, password recovery, or transaction approval.
   
   📌 Overview of the Workflow
   
   This n8n workflow, titled “Send and Check TTS (Text-to-Speech) Voice Calls and Email Verification,” begins with a form submission and splits into two verification paths: one for a phone via TTS voice call and another through email.
   
   Here’s what the workflow accomplishes:
   
   - Collects user information (phone number, email, preferred voice/language) through a form.
   - Sends a verification code via a TTS voice call using the ClickSend API.
   - Sends a separate verification code to the user's email via SMTP.
   - Waits for user input to confirm both voice and email codes.
   - Validates the submitted codes.
   - Displays success or failure messages based on validation results.
   
   🛠️ Step-by-Step Breakdown
   
   1. User Form Submission:
      The flow starts with the "On form submission" node. This form collects:
      
      - Phone number (To)
      - Preferred voice (male/female)
      - Language (e.g., en-us, fr-fr, etc.)
      - Email address
      - First name (Nome)
   
      With this data, the workflow proceeds to assign two separate verification codes — one for the voice call and another for the email.
   
   2. Voice Verification With ClickSend:
      - The “Set voice code” node defines a static code (e.g., 12345 for this demo).
      - “Code for voice” applies spacing between characters to improve clarity when spoken via TTS.
      - The “Send Voice” node calls the ClickSend API with the formatted code, TTS voice, language, and recipient phone number.
      - After placing the call, the flow prompts the user to input the code they heard over the phone via the “Verify voice code” form.
      - “Is voice code correct?” checks the submitted input against the original voice code. If matched, the email verification path is initiated. Otherwise, the user sees a failure message from "Fail voice code."
   
   3. Email Verification With SMTP:
      - The "Set email code" node assigns a second code (e.g., 56789).
      - The “Send Email” node dispatches the code to the submitted email, using HTML formatting to insert the recipient's name and make the email visually appealing.
      - The user is then asked to input the received code through the “Verify email code” form.
      - "Is email code correct?" validates the form entry.
      - A correct code results in a congratulatory message via the “Success” node. If incorrect, the "Fail email code" message is shown.
   
   📬 Technology Stack and Integrations
   
   This workflow features two major integrations:
   
   - ClickSend API: Responsible for sending out the verification message in the form of a voice call. ClickSend’s TTS capability allows for customization of voice and language, improving accessibility and comprehension.
   - SMTP (Simple Mail Transfer Protocol): Used for sending a personalized email with a verification code to the user's inbox.
   
   All logic and flows are built within the visual editor of n8n, providing seamless integration with HTTP requests, forms, conditional logic (if-statements), and code customization using JavaScript.
   
   🔐 Why Use Voice and Email Dual Verification?
   
   Relying solely on one verification channel can be risky. Combining email with voice call verification means that even if one platform is compromised or unavailable, the second method adds a safety net. This dual validation greatly increases the security of user identification systems.
   
   🧪 How to Test It
   
   1. Register an account on ClickSend and obtain your API key. You’ll receive free credits to test the voice call system.
   2. Set up your SMTP credentials in n8n for sending emails. Ensure your “Send Email” node has a valid fromEmail address.
   3. Customize the voice and email codes as needed (currently hardcoded for demo purposes) in the “Set voice code” and “Set email code” nodes.
   4. Deploy the workflow and submit a test form with your email and phone number.
   5. Receive a voice call, then an email, and test the verification process.
   
   📈 Final Thoughts
   
   This workflow highlights the immense flexibility of n8n as an automation engine. By combining ClickSend’s voice API and SMTP’s email delivery, you create a robust and user-friendly multi-step verification system.
   
   Perfect for onboarding, password recovery, or secure transaction workflows, this setup showcases how no-code tools are breaking down the barriers to advanced automation.
   
   ✨ Pro Tip: Enhance this flow by implementing real-time dynamic code generation or integrating with services like Twilio, Mailgun, or Firebase for even more flexibility.
   
   With a few nodes and some strategic planning, you can create a secure, scalable communication system tailor-made for your organization.

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.