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Yousign API and MCP server

Yousign sells its API only on separate plans, and its AI connector can only send from templates and read status. Sign in to Yousign once in your own Cloud Browser, and your AI agent does the work there for you. The same tools work over MCP for agents and as a REST API for scripts.

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Not affiliated with Yousign.

Yousign has no API for this. So we run one for you.

Yousign's own API, a GitHub MCP server and Cotlet compared
What you need Yousign's APIGitHub MCP serverCotlet
Reminders, cancelling, downloads, audit trails No Partly Yes, 11 tools
Acts as you, signed in 24/7 No No Yes, Cloud Browser
Fixed for you when Yousign changes N/A No Yes, tested every 6h
Runs with your laptop off N/A No Yes, hosted

Checked Oct 20, 2026. Sources: Youtrust (Yousign): API pricing · Youtrust (Yousign): AI connector · Yousign developers: Create your first signature request · Yousign Help: Create a signature request

Your own Cloud Browser, on 24/7. Sign in once. We keep it connected.

  1. 01Sign in to Yousign in your own Cloud Browser

  2. 02Connect it for your agents

  3. 03Cotlet keeps it signed in and working

How do I connect Yousign to Claude, ChatGPT or my code?

AI agents connect over MCP, scripts call the REST API. Both reach the same 11 tools with one API key.

For AI agents: MCP

Add Cotlet to your agent once. Yousign and every other app you connect show up as its tools.

  • Claude
  • ChatGPT
  • OpenClaw
  • Hermes
  • GrokBot
  • Cursor
  • n8n
  • Any MCP client
  1. 1

    Add Cotlet to your agent

    Claude Code
    claude mcp add --transport http cotlet \
  https://cotlet.dev/mcp/v1 \
  --header "Authorization: Bearer $COTLET_API_KEY"
    Cursor
    {
  "mcpServers": {
    "cotlet": {
      "url": "https://cotlet.dev/mcp/v1",
      "headers": {
        "Authorization": "Bearer ${COTLET_API_KEY}"
      }
    }
  }
}
    Codex
    # ~/.codex/config.toml
[mcp_servers.cotlet]
url = "https://cotlet.dev/mcp/v1"
bearer_token_env_var = "COTLET_API_KEY"

    Paste the snippet for your client. The same server and key serve every app you connect, so you do this once.

For scripts: REST API

Every tool is an endpoint under /api/v1/yousign with its own method and path, such as POST /api/v1/yousign/signature-requests/{signature_request_id}/reminders, with the same API key. Our open-source repo has ready scripts to start from.

REST API docs

What can the Yousign API and MCP server do?

11 tools on your own Yousign account. Agents call them as operations of the MCP tools yousign_read and yousign_write; scripts call each one at its own REST endpoint, with the same inputs and answers.

API reference
Yousign tools in Cotlet's MCP server and REST API
Tool What it does Access
list_signature_requests Lists signature requests with their status and signers. read
get_signature_request Returns one request with its signers, documents and settings. read
list_templates Lists the templates you can create signature requests from. read
list_contacts Lists the contacts in your Yousign contact book. read
download_signed_documents Returns the signed documents of a request as a file link. read
download_audit_trail Returns the proof file of a request or of one signer. read
create_signature_request Creates a draft signature request from an Active template. write
send_signature_request Sends a draft to its signers. writeasks first
send_reminder Reminds signers who have not signed yet. writeasks first
cancel_signature_request Cancels a request that is waiting for signatures. writeasks first
create_contact Adds a contact to your Yousign contact book. write

Scroll the table for all 11 tools.

Ask in plain words. Your agent does the rest.

All Yousign use cases

Is it safe to connect Yousign?

You sign in yourself in your own Cloud Browser, we never save your password, and anything that reaches your readers waits for your OK. The browser profile is encrypted in the EU. Independent scanners grade cotlet.dev A+.

Security overview

How much do the Yousign API and MCP server cost?

One price for both: a tool call costs the same over MCP or REST. Free 7-day trial with 2,000 credits, no card needed. Then one-time credit packs, no subscription, valid 12 months. Most calls use 25 credits, and your Cloud Browser uses 50 credits a day while Yousign is enabled for agents, so 20 calls a day come to 550 credits.

See full pricing
Cotlet credit packs: price, credits and calls at 25 credits each
Credits Price, one time Calls at 25 credits Per 1,000 credits
5,000 $29 200 $5.80
15,000 $79 600 $5.27
32,000 $149 1,280 $4.66
60,000 $249 2,400 $4.15

Only successful calls use credits; failed calls and timeouts cost nothing. At a balance of 0 calls pause, never a surprise charge. Authenticate with the Authorization: Bearer header.

Questions

Does Yousign have an API?

Yousign has a full REST API (v3) but sells it only on separate API plans, and its official AI connector is narrow (checked 20 Oct 2026). The API plans start at 104 EUR a month excl. VAT, billed yearly, with a free 40-day sandbox for testing. The AI connector works on all plans and can send a signature request from an existing template, list pending requests and check whether a person has signed. It has no reminders, cancelling or downloads.

How do I get access?

Sign up free, open Yousign under Integrations in the console and press Request access. Your free trial starts with your account, no card needed.

Is the MCP server different from the API?

No, only the way in. Cotlet builds each integration as a REST API and puts an MCP server on top, so both have the same 11 tools, the same inputs and answers, one API key and one price. AI agents such as Claude, ChatGPT or Cursor use MCP; scripts, cron jobs and HTTP steps in n8n, Make or Zapier use the REST API.

What is the Cloud Browser?

Your own Chrome that Cotlet runs for you in the EU, around the clock. You open it from the console, sign in to Yousign yourself and press Enable for agents. Your agent's calls go through it, from its IP with its cookies, so Yousign sees the browser you signed in with. Password saving is off and the profile is stored encrypted with AES-256-GCM.

Can my agent act without asking me?

Not on anything that reaches other people: send_signature_request, send_reminder, cancel_signature_request wait for your OK by default. You can switch that off per tool for scheduled runs.

Do I need a Yousign API plan?

No. Cotlet works in your own Yousign account, so the separate API plans, from 104 EUR a month excl. VAT billed yearly, are not needed. Your role still counts: templates are created by an owner, administrator or member, and templates are not on the Free plan. You can only see and act on what your account sees in the app.

Is Yousign now called Youtrust?

Yes. Yousign pages now redirect to youtrust.com, and the sources on this page use that domain. The app and the API still run under yousign.app. Cotlet works in the same account you already use.

Should I use a Yousign MCP server from GitHub instead?

Pick one if you want the code on your own computer and do not mind the upkeep: you install it, sign it in and fix it when Yousign changes. Pick Cotlet if you want it hosted and kept working for you.

Can I use it in n8n, Make or Zapier?

Yes. Add https://cotlet.dev/mcp/v1 in n8n's MCP Client node, or call the REST endpoints from an HTTP step in Make or Zapier.

Who runs Cotlet?

Cotlet is run by Take Group, a Polish software company working since 2019. Take Group runs about 3,200 websites on its own systems and has its own DevOps team for infrastructure security. We built and used integrations like this inside the company for years before opening them as Cotlet.

Is Cotlet affiliated with Yousign?

No. Cotlet is independent and not affiliated with Yousign.

Give your agent access to Yousign.

Free 7-day trial with 2,000 credits, no card needed.

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