What is the Yousign API?

The Yousign API offers a seamless way to integrate eSignature, eSeal, as well as document and data verification directly into your business applications.

Designed for maximum flexibility and ease of use, it helps accelerate agreement processes while maintaining a smooth user experience.

✍️ Electronic Signature

Easily integrate electronic signatures into all your tools or embed them directly into your application. We provide legally binding eSignatures compliant with GDPR and eIDAS standards.

🛡️ Electronic Seal

Automatically seal your electronic documents to guarantee their authenticity and integrity.

📑 Document & Identity Verification

Simplify customer onboarding and reduce the risk of fraud with our new document and identity verification solution.

🔀 Workflows

Connect every stage of your contracting process with smooth, compliant verification and signature journeys.

How does the Yousign API work?

The Yousign API follows RESTful conventions whenever possible. It accepts JSON content in requests (with the exception of the document upload request, which expects binary data) and returns JSON content in all responses.

The HTTP methods (GET, POST, PATCH, PUT, DELETE) determine the operation type on the resource. The resource is identified by the URL that is targeted by the method.

We provide webhooks to notify you in real time about key events such as signature completions or status changes.

The API supports two distinct environments: a sandbox environment for safe testing and development, and a production environment for live operations.

Why do developers choose the Yousign API?

A plug-and-play solution

Most of our customers integrate our API in less than one week. You benefit from fast and flexible integration thanks to all the available resources, features, and support.

A flexible integration

CRM, ERP, SIRH, website, or intranet—incorporate Yousign wherever it fits best for you.

A robust infrastructure

Several million signatures, seals, and document verifications are processed each month.

Looking for Yousign's API V2 documentation?

📘
This documentation provides information about our newest API. If you are not using it yet, you can refer to this documentation.
How do I know which version I'm using?
The best way to determine which version you have is to look at the base URL used for your API calls:

Yousign's API V2: https://api.yousign.com

Yousign's API V3: https://api.yousign.app/v3