Contractor+ MCP Server for LangChainGive LangChain instant access to 12 tools to Create Client, Create Estimate, Get Account Info, and more
LangChain is the leading Python framework for composable LLM applications. Connect Contractor+ 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 Contractor+ app connector for LangChain is a standout in the Erp Operations 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({
"contractor": {
"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 Contractor+, 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 Contractor+ MCP Server
Connect your Contractor+ account to any AI agent and take full control of your field service management and business operations through natural conversation.
LangChain's ecosystem of 500+ components combines seamlessly with Contractor+ 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
- Client & Lead Orchestration — List and manage your entire CRM programmatically, including creating new leads and retrieving detailed historical profiles
- Estimate & Invoice Architecture — Programmatically generate professional quotes and invoices, monitoring payment statuses and project totals in real-time
- Field Operations Intelligence — Access active jobs and scheduled work orders for your crews to maintain high-fidelity coordination between office and field
- Property Management — Access detailed records of service properties and tenant data to ensure perfectly coordinated site visits
- Operational Monitoring — Check API health status, monitor active webhooks, and retrieve account-level metadata directly through your agent for instant reporting
The Contractor+ 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 Contractor+ tools available for LangChain
When LangChain connects to Contractor+ through Vinkius, your AI agent gets direct access to every tool listed below — spanning job-estimates, invoicing, contractor-management, 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.
Create a new client or lead
Create a new estimate
Get account settings
Get client details
List all clients and leads
List project estimates
List billing invoices
List active jobs
List service properties
List incoming requests
List configured webhooks
List work orders
Connect Contractor+ to LangChain via MCP
Follow these steps to wire Contractor+ 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 Contractor+ MCP Server
LangChain provides unique advantages when paired with Contractor+ through the Model Context Protocol.
The largest ecosystem of integrations, chains, and agents. combine Contractor+ 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 Contractor+ queries for multi-turn workflows
Contractor+ + LangChain Use Cases
Practical scenarios where LangChain combined with the Contractor+ MCP Server delivers measurable value.
RAG with live data: combine Contractor+ tool results with vector store retrievals for answers grounded in both real-time and historical data
Autonomous research agents: LangChain agents query Contractor+, synthesize findings, and generate comprehensive research reports
Multi-tool orchestration: chain Contractor+ tools with web scrapers, databases, and calculators in a single agent run
Production monitoring: use LangSmith to trace every Contractor+ tool call, measure latency, and optimize your agent's performance
Example Prompts for Contractor+ in LangChain
Ready-to-use prompts you can give your LangChain agent to start working with Contractor+ immediately.
"List all active jobs and their current statuses in Contractor+."
"Create a new lead for 'John Doe' at 'john@example.com'."
"Show me the last 5 invoices and their payment status."
Troubleshooting Contractor+ MCP Server with LangChain
Common issues when connecting Contractor+ to LangChain through the Vinkius, and how to resolve them.
MultiServerMCPClient not found
pip install langchain-mcp-adaptersContractor+ + LangChain FAQ
Common questions about integrating Contractor+ 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.