Can I check the MRR and ARR metrics for a specific customer contract?

Yes. The `get_contract_metrics` tool allows your AI agent to retrieve real-time Monthly Recurring Revenue (MRR), Annual Recurring Revenue (ARR), and Total Contract Value (TCV) for any specific subscription ID.

How do I see if a customer's latest invoice has been paid?

You can use the `list_invoices` tool. Your AI agent will return a list of recent invoices along with their current status, such as 'DRAFT', 'POSTED', or 'PAID', helping you audit financial activity through chat.

Is it possible to terminate a subscription via conversation?

Absolutely. Using the `cancel_subscription_version` tool, you can instruct your agent to terminate a specific subscription. You'll need to provide the subscription and version IDs plus the effective cancellation date.

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

Name: Younium
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 Younium through the 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({
        "younium": {
            "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 Younium, 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 Younium MCP Server

Connect your Younium account to any AI agent and manage your B2B subscription infrastructure through natural conversation.

LangChain's ecosystem of 500+ components combines seamlessly with Younium through native MCP adapters. Connect 10 tools via the 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

Subscription Lifecycle — List all recurring billing subscriptions, retrieve historical versions, and create new subscription records directly from your agent
Account Management — Browse your enterprise SaaS customer base, retrieve deep details including tax IDs, and provision new billing accounts
Financial Metrics — Retrieve real-time MRR (Monthly Recurring Revenue), ARR, and TCV metrics for specific customer contracts
Invoice Auditing — List and monitor all generated invoices and track their payment statuses (DRAFT, POSTED, PAID) across your account
Product Discovery — Browse your billable product catalog and associated charge plans to understand your pricing inventory
Churn Control — Immediately terminate specific subscription versions and manage contract effective dates through simple chat commands
Deep Discovery — Quickly find unique account, subscription, and version IDs required for automated billing workflows

The Younium 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 Younium to LangChain via MCP

Follow these steps to integrate the Younium 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 Younium via MCP

Why Use LangChain with the Younium MCP Server

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

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

Younium + LangChain Use Cases

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

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

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

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

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

Younium MCP Tools for LangChain (10)

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

cancel_subscription

Provide the subscription and version IDs plus the effective date. Immediately terminates a specific subscription version

create_account

Provide the account configuration as a JSON object. Creates a new customer billing account record

create_subscription

Provide subscription details as a JSON object. Creates a new subscription for an existing account

get_account

Retrieves comprehensive details for a specific Younium account

get_metrics

Retrieves MRR, ARR, and TCV metrics for a specific subscription

get_subscription

Retrieves details for a specific subscription, including historical versions

list_accounts

Lists all customer accounts registered in the Younium ERP

list_invoices

Lists all invoices generated by Younium

list_products

Lists all products available in the Younium product catalog

list_subscriptions

Lists all recurring billing subscriptions in the account

Example Prompts for Younium in LangChain

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

"List the last 5 subscriptions in my Younium account."

"What is the MRR and ARR for the subscription with ID 'sub-101'?"

"List the last 3 invoices for Acme Corp (Account: acc-123)."

Troubleshooting Younium MCP Server with LangChain

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

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

Younium + LangChain FAQ

Common questions about integrating Younium 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.