YouSign

YouSign Signer API

Person who will sign a Signature Request.

GitHub OpenAPI
Business capability
Qualified Electronic Signatures & Trust Services AE-160.80

Operations 11

GET /signature_requests/{signatureRequestId}/signers List Signature Request's Signers #
POST /signature_requests/{signatureRequestId}/signers Create a new Signer #
DELETE /signature_requests/{signatureRequestId}/signers/{signerId} Delete a Signer #
GET /signature_requests/{signatureRequestId}/signers/{signerId} Get a Signer #
PATCH /signature_requests/{signatureRequestId}/signers/{signerId} Update a Signer #
POST /signature_requests/{signatureRequestId}/signers/{signerId}/identity_verification Pre-verify an identity document #
POST /signature_requests/{signatureRequestId}/signers/{signerId}/send_otp Send a One-Time Password (OTP) to a Signer #
POST /signature_requests/{signatureRequestId}/signers/{signerId}/send_reminder Send manual reminder to a Signer #
POST /signature_requests/{signatureRequestId}/signers/{signerId}/sign Sign a Signature Request #
POST /signature_requests/{signatureRequestId}/signers/{signerId}/unblock_identification Unblock Signer after an identity mismatch #
GET /signature_requests/{signatureRequestId}/signers/{signerId}/verified_identity_proof/download Download Verified Identity Proof PDF #

Documentation

📖
Documentation
https://developers.yousign.com/docs/introduction-new
📖
RateLimits
https://developers.yousign.com/docs/limits-new

Specifications

⚙
OpenAPI
https://artifacts.apis.io/yousign/openapi/yousign-signer-api-openapi.yml

Schemas & Data

📊
JSONSchema
https://artifacts.apis.io/yousign/json-schema/yousign-json-schema.yml

Other Resources

🔗
OASSpecification
https://developers.yousign.com/reference/oas-specification
🔗
Sandbox
https://developers.yousign.com/docs/environments-new
🔗
ChangeLog
https://developers.yousign.com/changelog
🔗
PostmanWorkspace
https://www.postman.com/yousign/yousign-api-v3/documentation/p4jlu5q/yousign-api-v3
🔗
Examples
https://artifacts.apis.io/yousign/examples/yousign-examples.yml
🔗
Vocabulary
https://artifacts.apis.io/yousign/vocabulary/yousign-vocabulary.yml
🔗
JSONLDContext
https://artifacts.apis.io/yousign/json-ld/yousign-context.jsonld

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/yousign:yousign-signer-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

yousign-signer-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  contact:
    email: contact@yousign.com
    name: Support
    url: https://yousign.com/contact
  description: Build the best experience of digital signature through your own platform. Increase your conversion rates, leverage your data and reduce your costs with Yousign API.
  license:
    name: proprietary
    url: https://yousign.com/terms
  title: Public Api v3 Signer API
  version: '3.0'
servers:
- description: Sandbox URL
  url: https://api-sandbox.yousign.app/v3
- description: Production URL
  url: https://api.yousign.app/v3
security:
- bearerAuth: []
tags:


# --- truncated at 32 KB (150 KB total) ---
# Full source: https://artifacts.apis.io/yousign/openapi/yousign-signer-api-openapi.yml