API

From Verification to eSignature:
one API for trusted agreements

Yousign provides trusted modular solutions that powers secure onboarding, compliant contracting, and fraud-resistant digital journeys.

We make the difference together

30,000 customers trust us

All the benefits of the Yousign API for your business

Activate trust components individually, or scale to fully unified workflows that connect every verification step to the final agreement.

  • Verify

    Trusted verification, instantly.

    • IDs
    • Company
    • Bank Account
    • Documents

  • Sign

    Secure signing, anywhere.

    • Simple eSignature
    • Advanced eSignature
    • Qualified eSignature

  • Seal

    Seamless document authentication.

    • Simple eSeal
    • Advanced eSeal
    • Qualified eSeal

Each step produces structured, auditable data that feeds the next one creating a continuous chain of trust from onboarding to agreement.

Built to simplify compliance and accelerate contracting

  • Ensure high compliance with low effort

  • Reduce fraud across onboarding & contracting

  • Shorten your time-to-contract

  • Secure your transactions

Embed trust at the core of your product and processes with a unique API built for developers

  • Go Live in Days

    Most of our customers go live in under a week. Comprehensive documentation, support, and real-time webhooks make integration fast and frictionless.

  • Modular by design

    Activate only the components you need, or build fully unified workflows customized to your brand.

  • Flexible integration

    Embed Yousign wherever it fits your stack: CRM, ERP, HRIS, website, intranet, or proprietary tools.

  • European-grade infrastructure

    High-availability infrastructure hosted in Europe, designed for security, resilience, and regulatory compliance.

  • Built to scale

    Several million signatures, seals, and document verifications are processed every month, ensuring proven reliability at scale.

Explore the documentation
Testimonials

Tested and approved by our customers

Find the plan that suits you

  • Plus

    Get everything you need to integrate the simplest eSignature flows into your solutions.

    See prices
    • Smart anchors
    • Webhooks
    Add-ons
    • eSignature

  • Pro

    Elevate your experience with advanced customization and eSignature capabilities.

    See prices
    • Custom experiences
    • Logs API & Logs Webhooks
    Add-ons
    • eSignature
    • eSeal
    • Verify

  • Scale

    From start-up to enterprise, scale with confidence with a customized pricing plan that meets your business needs.

    See prices
    • Volume-based pricing model
    • Higher send volume
    • Custom signing flow
    Add-ons
    • eSignature
    • eSeal
    • Verify

Sandbox

Integrate and test our API for free in a dedicated development space.
Includes all features available in paid plans and a dedicated support team. Switch to a paid plan when you're ready to go live.

Take it to the next level

Over 30,000 European companies already trust Yousign to sign and verify their documents. Join them today.