Developer API

Build with the ProtoSign API

Integrate e-signatures into your application in minutes. Full REST API with webhooks, SDKs, and comprehensive documentation.

RESTful API

Clean, intuitive endpoints that follow REST best practices for easy integration.

Webhooks

Real-time notifications when documents are viewed, signed, or completed.

Secure by Design

OAuth 2.0 authentication with API key rotation and rate limiting.

SDKs Available

Official libraries for Node.js, Python, Ruby, and more coming soon.

Simple to integrate

Get started with just a few lines of code

example.ts

import { ProtoSign } from '@protosign/sdk';

const client = new ProtoSign({
  apiKey: process.env.PROTOSIGN_API_KEY
});

// Create and send a document for signing
const document = await client.documents.create({
  file: './contract.pdf',
  signers: [
    { email: 'john@example.com', name: 'John Doe' }
  ]
});

// Check document status
const status = await client.documents.get(document.id);
console.log(status.state); // 'pending' | 'signed' | 'completed'