Welcome to Yousign API!

Why do developers choose Yousign API​?

  • Seamlessly integrate our powerful API into your tools and deliver the best experience to your teams and customers!
  • Use our legally binding eSignature compliant with GDPR and eIDAS norms.

What is Yousign API?

The Yousign API follows RESTful conventions when possible to enable the creation and management of Signature Requests and Electronic Seals.

Our API accepts JSON content in requests (with the exception of the document upload request, which expects binary) and returns JSON content in all of its responses.

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

A plug & play solution

Most of our customers integrate our API in less than 1 week. You benefit from a fast and flexible integration thanks to all the resources, features, and support available.

A flexible integration

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

A robust infrastructure

More than several million signature requests are processed each month.

Looking for Yousign's API V2 documentation?


This documentation aims to give you 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 option to know which version you have is to have a look at the base URL used for your API calls: