How do I get a Diese API Key?

Log in to your Diese account, navigate to **Settings > API**, and you will find your API Key there. You will also need your account subdomain.

Can the agent update task statuses?

This integration currently focuses on listing and retrieving ERP data for analysis. Modifying task statuses or project details should be managed via the Diese dashboard.

Is resource planning data included?

Yes, you can use the list_resource_planning tool to retrieve scheduled planning entries and resource allocations across your projects.

Diese MCP Server for LangChain 10 tools — connect in under 2 minutes

Name: Diese
Availability: InStock
Author: Vinkius

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

Built by Vinkius GDPR 10 Tools Framework

LangChain is the leading Python framework for composable LLM applications. Connect Diese 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({
        "diese": {
            "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 Diese, show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

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* 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 Diese MCP Server

Integrate Diese, the comprehensive cloud-based ERP software, directly into your AI workflow. Manage your business projects, monitor sales invoices and expenses, track resource planning and tasks, and research business partners using natural language.

LangChain's ecosystem of 500+ components combines seamlessly with Diese through native MCP adapters. Connect 10 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

Project Oversight — List and retrieve detailed configuration for all active and archived projects in your ERP.
Billing & Expense Tracking — Monitor sales invoices and business expenses, tracking their status and organizational approval.
Resource Intelligence — Access scheduled planning entries and resource allocations to ensure project efficiency.
Task Management — List pending project tasks and identify items that have passed their deadline.

The Diese MCP Server exposes 10 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 Diese to LangChain via MCP

Follow these steps to integrate the Diese 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 10 tools from Diese via MCP

Why Use LangChain with the Diese MCP Server

LangChain provides unique advantages when paired with Diese through the Model Context Protocol.

The largest ecosystem of integrations, chains, and agents. combine Diese 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 Diese queries for multi-turn workflows

Diese + LangChain Use Cases

Practical scenarios where LangChain combined with the Diese MCP Server delivers measurable value.

RAG with live data: combine Diese tool results with vector store retrievals for answers grounded in both real-time and historical data

Autonomous research agents: LangChain agents query Diese, synthesize findings, and generate comprehensive research reports

Multi-tool orchestration: chain Diese tools with web scrapers, databases, and calculators in a single agent run

Production monitoring: use LangSmith to trace every Diese tool call, measure latency, and optimize your agent's performance

Diese MCP Tools for LangChain (10)

These 10 tools become available when you connect Diese to LangChain via MCP:

get_account_metadata

Retrieve metadata and usage limits for your Diese account

get_project_details

Get detailed information for a specific ERP project

list_business_expenses

List all recorded business expenses and their approval status

list_erp_contacts

List all business contacts and partners in the system

list_erp_projects

List all active and archived projects in your Diese account

list_overdue_erp_tasks

Identify project tasks that have passed their deadline (mock logic)

list_project_tasks

List pending and completed tasks across all projects

list_resource_planning

List scheduled planning entries and resource allocations

list_sales_invoices

List all generated sales invoices and their payment status

search_projects_by_name

Search for a project using a name keyword

Example Prompts for Diese in LangChain

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

"List all active ERP projects."

"Show me the unpaid invoices from last month."

"Are there any project tasks overdue?"

Troubleshooting Diese MCP Server with LangChain

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

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

Diese + LangChain FAQ

Common questions about integrating Diese 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.