Middesk MCP Server for LangChain 9 tools — connect in under 2 minutes
LangChain is the leading Python framework for composable LLM applications. Connect Middesk 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 MCP SERVER
Vinkius supports streamable HTTP and SSE.
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({
"middesk": {
"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 Middesk, 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 Middesk MCP Server
Connect your Middesk account to automate Business Identity (KYB) and compliance workflows. This server provides comprehensive access to Middesk's verification engine.
LangChain's ecosystem of 500+ components combines seamlessly with Middesk through native MCP adapters. Connect 9 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
- Entity Verification — Create and monitor business verification requests with real-time status
- Document Retrieval — Access official Secretary of State filings and corporate documents
- Smart Prefill — Automatically populate business details from a single identifier like EIN or website
- Tax Registration — Manage and track state tax registrations and payroll compliance
- Identity Autocomplete — Search for businesses with live SOS record suggestions
The Middesk MCP Server exposes 9 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 Middesk to LangChain via MCP
Follow these steps to integrate the Middesk 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 9 tools from Middesk via MCP
Why Use LangChain with the Middesk MCP Server
LangChain provides unique advantages when paired with Middesk through the Model Context Protocol.
The largest ecosystem of integrations, chains, and agents. combine Middesk 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 Middesk queries for multi-turn workflows
Middesk + LangChain Use Cases
Practical scenarios where LangChain combined with the Middesk MCP Server delivers measurable value.
RAG with live data: combine Middesk tool results with vector store retrievals for answers grounded in both real-time and historical data
Autonomous research agents: LangChain agents query Middesk, synthesize findings, and generate comprehensive research reports
Multi-tool orchestration: chain Middesk tools with web scrapers, databases, and calculators in a single agent run
Production monitoring: use LangSmith to trace every Middesk tool call, measure latency, and optimize your agent's performance
Middesk MCP Tools for LangChain (9)
These 9 tools become available when you connect Middesk to LangChain via MCP:
autocomplete_identity
Autocomplete business identity
create_business
Requires legal name. Create a new business verification
get_business
Get a specific business
get_document
Get a specific document
get_tax_registration
Get a specific tax registration
list_businesses
List all businesses
list_documents
List documents for a business
list_tax_registrations
List tax registrations
prefill_business
g., website). Prefill business details
Example Prompts for Middesk in LangChain
Ready-to-use prompts you can give your LangChain agent to start working with Middesk immediately.
"Verify the business 'Acme Corp' located in Delaware."
"Find SOS filings for business ID 'bus_123'."
Troubleshooting Middesk MCP Server with LangChain
Common issues when connecting Middesk to LangChain through the Vinkius, and how to resolve them.
MultiServerMCPClient not found
pip install langchain-mcp-adaptersMiddesk + LangChain FAQ
Common questions about integrating Middesk 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.Which LangChain agent types work with MCP?
Can I trace MCP tool calls in LangSmith?
Connect Middesk with your favorite client
Step-by-step setup guides for every MCP-compatible client and framework:
Anthropic's native desktop app for Claude with built-in MCP support.
AI-first code editor with integrated LLM-powered coding assistance.
GitHub Copilot in VS Code with Agent mode and MCP support.
Purpose-built IDE for agentic AI coding workflows.
Autonomous AI coding agent that runs inside VS Code.
Anthropic's agentic CLI for terminal-first development.
Python SDK for building production-grade OpenAI agent workflows.
Google's framework for building production AI agents.
Type-safe agent development for Python with first-class MCP support.
TypeScript toolkit for building AI-powered web applications.
TypeScript-native agent framework for modern web stacks.
Python framework for orchestrating collaborative AI agent crews.
Leading Python framework for composable LLM applications.
Data-aware AI agent framework for structured and unstructured sources.
Microsoft's framework for multi-agent collaborative conversations.
Connect Middesk to LangChain
Get your token, paste the configuration, and start using 9 tools in under 2 minutes. No API key management needed.