Cloze MCP Server for LangChain 9 tools — connect in under 2 minutes
LangChain is the leading Python framework for composable LLM applications. Connect Cloze through Vinkius and LangChain agents can call every tool natively. combine them with retrievers, memory, and output parsers for sophisticated AI pipelines.
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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({
"cloze": {
"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 Cloze, 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 Cloze MCP Server
Cloze is a smart CRM that automatically tracks your interactions and provides AI-powered insights to manage your relationships, projects, and deals. Through this MCP server, your AI agent can effortlessly pull contact histories, lookup custom tags, verify relationship strengths, and update ongoing project states without breaking your workflow.
LangChain's ecosystem of 500+ components combines seamlessly with Cloze 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.
The Cloze 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 Cloze to LangChain via MCP
Follow these steps to integrate the Cloze 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 Cloze via MCP
Why Use LangChain with the Cloze MCP Server
LangChain provides unique advantages when paired with Cloze through the Model Context Protocol.
The largest ecosystem of integrations, chains, and agents. combine Cloze 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 Cloze queries for multi-turn workflows
Cloze + LangChain Use Cases
Practical scenarios where LangChain combined with the Cloze MCP Server delivers measurable value.
RAG with live data: combine Cloze tool results with vector store retrievals for answers grounded in both real-time and historical data
Autonomous research agents: LangChain agents query Cloze, synthesize findings, and generate comprehensive research reports
Multi-tool orchestration: chain Cloze tools with web scrapers, databases, and calculators in a single agent run
Production monitoring: use LangSmith to trace every Cloze tool call, measure latency, and optimize your agent's performance
Cloze MCP Tools for LangChain (9)
These 9 tools become available when you connect Cloze to LangChain via MCP:
create_person
Provide at least name or email. Create a new person in Cloze
create_project
Create a new project, deal, or property in Cloze
get_person
Retrieve detailed information about a specific person by email
list_companies
Retrieve a list of companies from Cloze
list_custom_fields
Retrieve definitions for custom fields in your Cloze account
list_people
Retrieve a list of people (contacts) from Cloze
list_projects
Retrieve a list of projects, properties, or deals from Cloze
search_people_by_tag
Find contacts that have a specific tag
update_person
Email is used as the match key. Update an existing person in Cloze (matching by email)
Example Prompts for Cloze in LangChain
Ready-to-use prompts you can give your LangChain agent to start working with Cloze immediately.
"Get all details for the person with email 'sarah@example.com' in Cloze."
"Show me my active projects in Cloze."
"Find all contacts tagged with 'VIP' in Cloze."
Troubleshooting Cloze MCP Server with LangChain
Common issues when connecting Cloze to LangChain through the Vinkius, and how to resolve them.
MultiServerMCPClient not found
pip install langchain-mcp-adaptersCloze + LangChain FAQ
Common questions about integrating Cloze 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 Cloze 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 Cloze to LangChain
Get your token, paste the configuration, and start using 9 tools in under 2 minutes. No API key management needed.