ElevenLabs Post-Call Webhook Listener

A simple Node.js/Express service that receives post-call webhooks from ElevenLabs, verifies HMAC signatures, and emails a call summary (including phone number and transcript) via SendGrid.

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📦 Features

• HMAC-SHA256 verification of incoming webhook payloads
• Supports call.finished and post_call_transcription events
• Extracts caller phone number and full transcript
• Sends notification email via SendGrid
• Easy deployment on any Linux server with PM2 & Nginx

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🛠️ Prerequisites

• Node.js v16+ & npm
• SendGrid API key
• ElevenLabs webhook signing secret
• A public domain (e.g. api.eboxlab.com) pointing at your server
• Nginx (for reverse-proxy + SSL)
• PM2 (to keep the service running)

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🚀 Installation

1. Clone the repo

   git clone https://github.com/your-org/elevenlabs-webhook.git
   cd elevenlabs-webhook