Yousign MCP Server for LangChainGive LangChain instant access to 12 tools to Activate Signature Request, Add Document To Request, Add Signer To Request, and more
LangChain is the leading Python framework for composable LLM applications. Connect Yousign through Vinkius and LangChain agents can call every tool natively. combine them with retrievers, memory, and output parsers for sophisticated AI pipelines.
Ask AI about this App Connector for LangChain
The Yousign app connector for LangChain is a standout in the Industry Titans category — giving your AI agent 12 tools to work with, ready to go from day one.
Vinkius delivers Streamable HTTP and SSE to any MCP client
import asyncio
from langchain_mcp_adapters.client import MultiServerMCPClient
from langchain_openai import ChatOpenAI
from langgraph.prebuilt import create_react_agent
async def main():
# Your Vinkius token. get it at cloud.vinkius.com
async with MultiServerMCPClient({
"yousign-alternative": {
"transport": "streamable_http",
"url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
}
}) as client:
tools = client.get_tools()
agent = create_react_agent(
ChatOpenAI(model="gpt-4o"),
tools,
)
response = await agent.ainvoke({
"messages": [{
"role": "user",
"content": "Using Yousign, show me what tools are available.",
}]
})
print(response["messages"][-1].content)
asyncio.run(main())
* 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
About Yousign MCP Server
Connect your Yousign account to any AI agent to automate your electronic signature workflows and contract management through natural conversation.
LangChain's ecosystem of 500+ components combines seamlessly with Yousign through native MCP adapters. Connect 12 tools via Vinkius and use ReAct agents, Plan-and-Execute strategies, or custom agent architectures. with LangSmith tracing giving full visibility into every tool call, latency, and token cost.
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.
The Yousign MCP Server exposes 12 tools through the Vinkius. Connect it to LangChain in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.
All 12 Yousign tools available for LangChain
When LangChain connects to Yousign through Vinkius, your AI agent gets direct access to every tool listed below — spanning contract-signing, electronic-signature, security, and more. Every call is secured with network, filesystem, subprocess, and code evaluation entitlements inside a sandboxed runtime. Beyond a simple connection, you get a full AI Gateway with real-time visibility into agent activity, enterprise governance, and optimized token usage.
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
Connect Yousign to LangChain via MCP
Follow these steps to wire Yousign into LangChain. The entire setup takes under two minutes — your credentials stay safe behind the Vinkius.
Install dependencies
pip install langchain langchain-mcp-adapters langgraph langchain-openaiReplace the token
[YOUR_TOKEN_HERE] with your Vinkius tokenRun the agent
python agent.pyExplore tools
Why Use LangChain with the Yousign MCP Server
LangChain provides unique advantages when paired with Yousign through the Model Context Protocol.
The largest ecosystem of integrations, chains, and agents. combine Yousign MCP tools with 500+ LangChain components
Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step
LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging
Memory and conversation persistence let agents maintain context across Yousign queries for multi-turn workflows
Yousign + LangChain Use Cases
Practical scenarios where LangChain combined with the Yousign MCP Server delivers measurable value.
RAG with live data: combine Yousign tool results with vector store retrievals for answers grounded in both real-time and historical data
Autonomous research agents: LangChain agents query Yousign, synthesize findings, and generate comprehensive research reports
Multi-tool orchestration: chain Yousign tools with web scrapers, databases, and calculators in a single agent run
Production monitoring: use LangSmith to trace every Yousign tool call, measure latency, and optimize your agent's performance
Example Prompts for Yousign in LangChain
Ready-to-use prompts you can give your LangChain agent to start working with Yousign immediately.
"Create a new signature request named 'Annual Service Agreement'."
"Check the status of my ongoing signature requests."
Troubleshooting Yousign MCP Server with LangChain
Common issues when connecting Yousign to LangChain through the Vinkius, and how to resolve them.
MultiServerMCPClient not found
pip install langchain-mcp-adaptersYousign + LangChain FAQ
Common questions about integrating Yousign MCP Server with LangChain.
How does LangChain connect to MCP servers?
langchain-mcp-adapters to create an MCP client. LangChain discovers all tools and wraps them as native LangChain tools compatible with any agent type.