Create a REST API for PDF Digital Signatures with Webhooks

✍️ Instantly turn n8n into a secure PDF signing API!

This automation creates a complete REST API that lets you upload, sign, and download PDF documents — all using n8n webhooks. With full support for digital certificates and cryptographic signing, it’s ideal for integrating e-signature functionality into your workflows or building POCs for secure document systems.

Perfect for developers, automation pros, and teams needing API-based PDF signing without third-party platforms.

What it does:

🌐 Exposes REST API endpoints via n8n webhooks
📎 Accepts PDF uploads and JSON config via multipart/form-data
🔐 Handles digital certificates (upload or auto-generate)
✍️ Applies secure cryptographic signatures to PDFs
📤 Offers download links for signed documents
🧰 Validates, routes, and manages requests securely

✅ Fully customizable for different use cases or dev environments
🔧 Great for integrations, testing, and production-ready workflows

Need help setting it up? We offer full configuration and testing for a one-time fee.