Bring Contract Signing
to Mastra AI
Learn how to connect Yousign to Mastra AI and start using 12 AI agent tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code.
What is the Yousign MCP Server?
Connect your Yousign account to any AI agent to automate your electronic signature workflows and contract management through natural conversation.
What you can do
- Request Management — Create and manage electronic signature requests for multiple documents and signers.
- Signer Customization — Add signers with customizable signature levels and authentication modes (OTP, no-OTP).
- Real-time Monitoring — Track signature request status in real-time and automate the activation/sending process.
- Compliance & Auditing — Download signed documents and comprehensive audit trails for full legal compliance.
How it works
1. Subscribe to this server
2. Enter your Yousign API Key from your account settings
3. Start managing your e-signatures from Claude, Cursor, or any MCP-compatible client
Who is this for?
- HR Teams — automate the sending of employment contracts and onboarding documents.
- Legal Departments — manage contract lifecycles and ensure all agreements are legally binding.
- Sales Operations — accelerate deal closures by automating the signature process for sales agreements.
Built-in capabilities (12)
Send for signature
Note: In this version, pass metadata info. Upload PDF to sign
Define who signs
Stop signature process
Start new signature process
Add to address book
Remove draft request
Get evidence file link
Get request status
Get account info
List all requests
List address book
Why Mastra AI?
Mastra's agent abstraction provides a clean separation between LLM logic and Yousign tool infrastructure. Connect 12 tools through Vinkius and use Mastra's built-in workflow engine to chain tool calls with conditional logic, retries, and parallel execution. deployable to any Node.js host in one command.
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Mastra's agent abstraction provides a clean separation between LLM logic and tool infrastructure. add Yousign without touching business code
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Built-in workflow engine chains MCP tool calls with conditional logic, retries, and parallel execution for complex automation
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TypeScript-native: full type inference for every Yousign tool response with IDE autocomplete and compile-time checks
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One-command deployment to any Node.js host. Vercel, Railway, Fly.io, or your own infrastructure
Yousign in Mastra AI
Yousign and 3,400+ other MCP servers. One platform. One governance layer.
Teams that connect Yousign to Mastra AI through Vinkius don't need to source, host, or maintain individual MCP servers. Every tool call runs inside a hardened runtime with credential isolation, DLP, and a signed audit chain.
Raw MCP | Vinkius | |
|---|---|---|
| Server catalog | Find and host yourself | 3,400+ managed |
| Infrastructure | Self-hosted | Sandboxed V8 isolates |
| Credential handling | Plaintext in config | Vault + runtime injection |
| Data loss prevention | None | Configurable DLP policies |
| Kill switch | None | Global instant shutdown |
| Financial circuit breakers | None | Per-server limits + alerts |
| Audit trail | None | Ed25519 signed logs |
| SIEM log streaming | None | Splunk, Datadog, Webhook |
| Honeytokens | None | Canary alerts on leak |
| Custom domains | Not applicable | DNS challenge verified |
| GDPR compliance | Manual effort | Automated purge + export |
Why teams choose Vinkius for Yousign in Mastra AI
The Yousign MCP Server runs on Vinkius-managed infrastructure inside AWS — a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts. All 12 tools execute in hardened sandboxes optimized for native MCP execution.
Your AI agents in Mastra AI only access the data you authorize, with DLP that blocks sensitive information from ever reaching the model, kill switch for instant shutdown, and up to 60% token savings. Enterprise-grade infrastructure, zero maintenance.
* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure
How Vinkius secures
Yousign for Mastra AI
Every tool call from Mastra AI to the Yousign MCP Server is protected by DLP redaction, cryptographic audit chains, V8 sandbox isolation, kill switch, and financial circuit breakers.
Frequently asked questions
What is the difference between Draft and Ongoing status?
A 'draft' request is still being prepared (adding documents or signers). Once you 'activate' it, it becomes 'ongoing' and signers receive their invitations to sign.
How do I download a completed signed document?
When a request status is 'done', you can retrieve download links for each document using the 'get_signature_request' tool through your AI agent.
How does Mastra AI connect to MCP servers?
Create an MCPClient with the server URL and pass it to your agent. Mastra discovers all tools and makes them available with full TypeScript types.
Can Mastra agents use tools from multiple servers?
Yes. Pass multiple MCP clients to the agent constructor. Mastra merges all tool schemas and the agent can call any tool from any server.
Does Mastra support workflow orchestration?
Yes. Mastra has a built-in workflow engine that lets you chain MCP tool calls with branching logic, error handling, and parallel execution.
createMCPClient not exported
Install: npm install @mastra/mcp