Can I check the payment status of an invoice using the agent?

Yes! Use the `get_invoice` tool with the Invoice ID. Your agent will fetch the latest status, showing if it is draft, issued, or paid.

How do I list all my customers in Bexio?

Simply ask the agent to `list_contacts`. It will retrieve the directory of all companies and persons registered in your Bexio account.

Does the integration allow me to create a new invoice?

Currently, the toolset is focused on querying and management (listing contacts, checking projects, auditing invoices). For creating complex financial documents like invoices with multiple line items, we recommend using the Bexio platform directly.

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

Name: Bexio
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 Bexio 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({
        "bexio": {
            "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 Bexio, show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* 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 Bexio MCP Server

Connect your Bexio account to any AI agent and orchestrate your business workflows, including CRM, accounting, and project management, through natural conversation.

LangChain's ecosystem of 500+ components combines seamlessly with Bexio 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

Contact Management — List, create, and retrieve detailed information for customers, suppliers, and partners.
Invoicing & Sales — Query invoices, offers, and orders to stay on top of your sales pipeline and receivables.
Project Oversight — List all business projects and monitor their status and progress.
Inventory & Items — Access your product catalog and list items with pricing and stock metadata.
Team Collaboration — Retrieve lists of users within your Bexio organization for better task coordination.

The Bexio 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 Bexio to LangChain via MCP

Follow these steps to integrate the Bexio 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 Bexio via MCP

Why Use LangChain with the Bexio MCP Server

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

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

Bexio + LangChain Use Cases

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

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

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

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

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

Bexio MCP Tools for LangChain (10)

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

create_contact

Create a new contact

get_contact

Get specific contact details

get_invoice

Get specific invoice details

list_contacts

List all contacts

list_invoices

List all invoices

list_items

List all products/items

list_offers

List all offers

list_orders

List all orders

list_projects

List all projects

list_users

List all Bexio users

Example Prompts for Bexio in LangChain

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

"List all active projects in Bexio."

"Find the contact details for 'Acme Corp'."

"Show my last 5 invoices."

Troubleshooting Bexio MCP Server with LangChain

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

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

Bexio + LangChain FAQ

Common questions about integrating Bexio 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.