This article provides a complete, practical walkthrough of the Http Form 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 Text-to-Speech Voice Calls with n8n and ClickSend
   
   Meta Description:  
   Learn how to automate voice calls using text-to-speech technology with this easy-to-follow n8n workflow integrated with the ClickSend API. Ideal for alerts, reminders, and voice communication automation.
   
   Keywords:  
   n8n, ClickSend API, text-to-speech, TTS automation, voice calls, workflow automation, send voice messages, HTTP Request in n8n, voice messaging, API integration, text-to-voice, automation tools
   
   Third-party APIs Used:
   
   - ClickSend API (for sending the voice calls via text-to-speech)
   
   —
   
   Article:
   
   Automating Text-to-Speech Voice Calls with n8n and ClickSend
   
   In a world where automation plays a key role in enhancing communication and operational efficiency, voice calls remain a powerful yet underutilized method for conveying timely messages. With n8n, a powerful open-source workflow automation tool, you can easily bridge the gap between your application logic and real-world communication using the ClickSend API. This article walks through a ready-to-use n8n workflow that allows users to send automated voice calls with custom text-to-speech content in a few clicks—ideal for event alerts, appointment reminders, or any situation where a spoken message makes a stronger impact.
   
   Overview of the Workflow
   
   This n8n workflow, titled “Send TTS (Text-to-Speech) Voice Calls,” provides a simple user interface to input a message, select a voice and language, and specify a recipient's phone number. Once submitted, the system automatically sends a call where the text is read in the selected voice and language. Here’s how it works, step-by-step:
   
   Step 1: Get Your ClickSend API Credentials
   
   Before starting, users need to sign up for a ClickSend account via a dedicated link ([https://clicksend.com/?u=586989](https://clicksend.com/?u=586989)). ClickSend provides €2 worth of free credits upon registration—more than enough to test out this automated workflow.
   
   Once registered, users can retrieve their API username and key, which are configured as “Basic Auth” credentials within n8n. Specifically, the username is the registered account name, while the password is the provided API key.
   
   Step 2: The n8n User Form
   
   The system includes a customized form powered by n8n’s “Form Trigger” node. This form includes the following input fields:
   
   - Body: The actual text message to be spoken during the call (up to 600 characters).
   - To: The recipient's phone number in international format (e.g., +39xxxxxxxxxx).
   - Voice: A dropdown menu allowing users to choose between male and female voices.
   - Language: A list of supported languages and dialects including English (US, UK, Australia), Italian, German, French, Spanish, Russian, and others.
   
   When the user submits the form, the data gets passed to the next node for processing.
   
   Step 3: Sending the Voice Call
   
   The core functionality of this workflow is powered by n8n’s “HTTP Request” node, which connects to ClickSend’s Voice API endpoint:  
   https://rest.clicksend.com/v3/voice/send
   
   This node dynamically uses the inputs from the form — the message body, recipient number, selected voice, and language — and constructs a valid POST request to initiate a voice call. Key configuration details include:
   
   - Sending JSON body format with parameters like body, to (phone), voice, and lang.
   - Content-Type header set to application/json.
   - Machine detection enabled: the voice message identifies whether it’s speaking to a human or voicemail and behaves accordingly.
   
   Machine detection minimizes the chance of a message being missed or cut off during playback.
   
   Possible Use Cases
   
   This TTS voice call automation workflow unlocks numerous use cases across different industries. Some potential applications include:
   
   - Doctor’s office or service-based businesses sending appointment reminders via call.
   - IT and software systems alerting users about system downtimes or urgent errors.
   - E-commerce platforms making delivery confirmations or real-time order status updates.
   - Educational institutions informing students or parents about important events.
   
   All of this can be set up with minimal coding, thanks to n8n’s visual interface.
   
   Advantages of This Approach
   
   1. Fast Deployment: The workflow requires only a ClickSend account and a few clicks in n8n's UI to configure.
   2. Multilingual: The system supports a wide array of languages and dialects.
   3. Programmable: You can expand or integrate the workflow with CRM tools, calendars, or databases for even more robust communication pipelines.
   4. Cost-Effective: ClickSend’s TTS service is affordable and comes with free credits for initial testing.
   
   Conclusion
   
   Using n8n and the ClickSend Voice API, you can quickly and affordably set up a text-to-speech voice calling system accessible via a simple web-based form. Whether you're a developer, business owner, or system administrator, this workflow empowers smoother, faster, and more human touchpoints—powered by automation.
   
   This modular setup is a great example of how no-code/low-code platforms like n8n are redefining the future of communication automation. With just a few steps, you can bring vocal communication to the forefront of your automation toolkit.
   
   Ready to get started? Sign up for ClickSend, grab your API Key, and deploy the workflow in n8n to unlock the power of voice communication today.

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.