Can I check the status of a signature request via chat?

Yes. The `get_signature_request` tool allows your AI agent to retrieve the real-time status of any request ID, showing you whether it is in 'draft', 'ongoing', 'done', or has been 'cancelled'.

How do I add signers to a draft request using the agent?

You can use the `add_signer` tool. Provide the unique request ID along with the signer's email, first name, and last name. You can add multiple signers to a single request before activating it.

Can I see how many signature credits I have left in my plan?

Absolutely. Use the `get_api_consumption` tool to retrieve your current usage statistics and remaining signature credits, helping you manage your Yousign subscription budget.

Yousign MCP Server for LangChain 8 tools — connect in under 2 minutes

Name: Yousign
Availability: InStock
Author: Vinkius

python.langchain.com/docs/integrations/tools/mcp

Built by Vinkius GDPR 8 Tools Framework

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.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

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": {
            "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())

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V8 IsolateSandboxed

Ed25519Audit chain

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Stream every event to Splunk, Datadog, or your own webhook in real-time

* 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 and manage your electronic signature infrastructure through natural conversation.

LangChain's ecosystem of 500+ components combines seamlessly with Yousign through native MCP adapters. Connect 8 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

Signature Lifecycle — Create new signature requests in draft mode, add signers, and activate requests to send them for signing
Request Monitoring — List and browse all signature processes and retrieve real-time status (draft, ongoing, done, cancelled)
Signer Management — Define and add multiple signers to a request by providing their contact details directly from your agent
Document Discovery — List all files attached to a specific signature request to verify the contents before activation
Cancellation Control — Permanently stop ongoing signature requests and provide custom reasons for termination through simple commands
Quota Auditing — Retrieve API consumption and credit details to monitor your Yousign plan usage and remaining signatures
Deep Discovery — Quickly find unique request, signer, and document IDs required for automated legal workflows

The Yousign MCP Server exposes 8 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.

How to Connect Yousign to LangChain via MCP

Follow these steps to integrate the Yousign MCP Server with LangChain.

Install dependencies

Run pip install langchain langchain-mcp-adapters langgraph langchain-openai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save the code and run python agent.py

Explore tools

The agent discovers 8 tools from Yousign via MCP

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

Yousign MCP Tools for LangChain (8)

These 8 tools become available when you connect Yousign to LangChain via MCP:

activate_request

This triggers email notifications to all signers. Activates a draft signature request and sends it to signers

add_signer

Provide the request ID and signer contact details. Adds a new signer to an existing draft signature request

cancel_request

Provide the request ID and an optional reason for cancellation. Permanently cancels an ongoing signature request

create_request

Provide a descriptive name for the request. Creates a new signature request in draft mode

get_consumption

Retrieves API consumption and quota details

get_request

Retrieves details and status for a specific signature request

list_documents

Lists all documents attached to a specific signature request

list_requests

Lists all signature requests in the Yousign organization

Example Prompts for Yousign in LangChain

Ready-to-use prompts you can give your LangChain agent to start working with Yousign immediately.

"List all ongoing signature requests in Yousign."

"Add 'Jane Smith' (jane@example.com) as a signer to request ID 'req-101'."

"Check our current API consumption and credits."

Troubleshooting Yousign MCP Server with LangChain

Common issues when connecting Yousign to LangChain through the Vinkius, and how to resolve them.

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

Yousign + LangChain FAQ

Common questions about integrating Yousign MCP Server with LangChain.

How does LangChain connect to MCP servers?

Use langchain-mcp-adapters to create an MCP client. LangChain discovers all tools and wraps them as native LangChain tools compatible with any agent type.

Which LangChain agent types work with MCP?

All agent types including ReAct, OpenAI Functions, and custom agents work with MCP tools. The tools appear as standard LangChain tools after the adapter wraps them.