Stays with XenMCP
Passwords, API keys and connection strings – encrypted in Germany, never passed to the AI client. Logs hold only tool, time and status, no content.
Closed beta in preparation
Connect your systems to Claude – safely
XenMCP turns databases, business tools and MCP servers into a connector with OAuth for Claude, Cursor and VS Code – including the Claude app on your phone. Your credentials stay with us, your database stays closed to the internet, and everyone gets their own access you can revoke.
Join the waitlist Browse the catalog
Free beta · No server to run, no code · Hosted in Germany
Add connector
NameMongoDB (Acme)
URLhttps://mongodb-acme.xenmcp.com/mcp
Sign in with XenMCP · OAuth 2.1
How many orders came from Austria this week?
aggregate · orders · read-only
Why this is needed
Most MCP servers run locally over stdio – only on the computer that starts them. They do not work in the Claude app, on your phone or for your team. For that, a server needs a public HTTPS address, OAuth, a safe place for credentials and someone to run it. And many remote servers only accept an API key – which then everyone on the team shares.
XenMCP takes care of exactly that part – isolated per server, without storing the content of your calls, hosted in Germany.
Where does your data go?
Plainly, without small print: what stays with us, what your AI client sees and what never leaves your system.
Goes to your AI client
Only the results of the queries you trigger in the conversation. With Claude, Anthropic processes them in the US under its terms – you decide which client to use.
Stays in your system
Everything nobody asks for. Your database is open only to XenMCP’s fixed IP, read-only, and access can be revoked per person.
The whole chain in Europe?
With a European AI client everything stays in the EU: Mistral’s Le Chat connects custom MCP servers, the Xenaxio AI assistant runs on Mistral, or you use your own model. The same XenMCP address works with all of them.
Three ways to a connector
Catalog
Reviewed servers for databases and business software. Enter credentials, copy the address. First wave at beta launch: MongoDB, PostgreSQL, MySQL.
Open the catalog →OAuth bridge for API-key servers
Your MCP server already runs on the internet but wants an API key? We turn it into an address with OAuth: everyone signs in individually, the key stays encrypted with us.
How it works →Your own MCP server
From npm, Docker or GitHub – even stdio-only servers, without changes. Planned after the beta launch.
Learn more →From the catalog
Full catalog →- MongoDB At beta launch Ask your MongoDB questions in plain language – from Claude on the web, on your phone or in your IDE. XenMCP runs the official MongoDB MCP server for you in Germany.
- PostgreSQL At beta launch Ask your PostgreSQL database questions in plain language. Claude writes the SQL, XenMCP runs it safely and read-only.
- MySQL / MariaDB At beta launch Shop database, CRM or your own application: ask your MySQL or MariaDB database questions in plain language – without writing SQL yourself.
-
Redis
Planned
Check keys, queues and the state of your cache by asking Claude – without
redis-cliand without an open port. - Nextcloud Planned Find files, check appointments, look up contacts: connect your own Nextcloud to Claude without running a server yourself.
- E-Mail (JMAP, Stalwart) Planned Search and read your mailbox with Claude – on Stalwart, Fastmail, Cyrus or any other mail server that speaks JMAP.
- Salesforce Planned Ask Claude about accounts, opportunities and tasks in your Salesforce – through an MCP server that XenMCP runs in Germany.
- Lexware Office Planned Ask Claude about open invoices, vouchers and contacts in Lexware Office (formerly lexoffice) – through an MCP server in Germany.
- sevDesk Planned Ask Claude about invoices, vouchers and contacts in sevDesk – through an MCP server that XenMCP runs in Germany.
How it works
- 1
Pick a server
From the catalog – MongoDB or PostgreSQL, for example –, your remote server with an API key, or later your own code.
- 2
Enter credentials
Connection string, API key or login. Everything is stored encrypted and never shown again.
- 3
Get an address
Your server gets a fixed address like
https://mongodb-acme.xenmcp.com/mcp. - 4
Add it to Claude
Add it as a connector in Claude, Cursor or VS Code, sign in, allow – done. On your phone, too.
Works with: Claude (Web, Desktop, iOS, Android) · Claude Code · Cursor · VS Code · other MCP clients
Security you can check
Credentials encrypted
Passwords, connection strings and API keys are encrypted with AES-256-GCM, never shown again and never logged.
OAuth 2.1 per person
Everyone signs in individually. Access can be revoked per person without changing the key.
Fixed outbound IP
Open your database only to XenMCP’s IP address – not to the whole internet.
Logs without content
We record which tool was called and when – not the requests and not the results.
One sandbox per server
Every MCP server runs isolated in gVisor with its own CPU and memory limits and no access to other customers.
Hosted in Germany
Gateway, sandboxes and database run on servers in Germany. No US provider’s proxy in front of your data.
Who it is for
Developers
Your local server should work in the Claude app and on your phone, too – without running a server, certificates and OAuth plumbing.
Teams and agencies
Set servers up once, everyone signs in individually. Credentials live in one place instead of on every laptop.
Companies in Germany and the EU
Hosting in Germany, DPA, logs without content. Open databases to one fixed IP instead of the whole internet.
Vendors of MCP servers
You have a server or an API and want to give your customers a ready connector? Talk to us.
Vibe coders and AI agents
Your agent writes the server? Give it our rules – it makes the code ready for XenMCP.
Guides
All guides →- What is MCP? The Model Context Protocol explainedMCP connects AI assistants such as Claude or ChatGPT to your data and tools. How the protocol works, what the risks are and how to keep them small.
- Connect an MCP server to Claude – web, desktop, mobile and developer toolsHow to add a remote MCP server as a connector in Claude on the web, in Claude Desktop and on your phone – plus Claude Code, Cursor and VS Code.
- Using an MCP server with an API key in Claude – four ways comparedYour MCP server wants an API key in a header, but Claude is built around OAuth? Here are four ways to connect them – from request headers to an OAuth bridge.
- Connect a database to Claude safely – MongoDB, PostgreSQL and MySQLUse MongoDB, PostgreSQL or MySQL with Claude via MCP without exposing the database to the internet: read-only user, IP allowlist, TLS and more safeguards.
Frequently asked questions
What is XenMCP?
XenMCP is a hosting service for MCP (Model Context Protocol) servers with servers in Germany. You pick a server from the catalog, enter your credentials or connect your own server, and get a fixed address with OAuth that you add as a connector in Claude, Cursor, VS Code or any other MCP client.
Can I use XenMCP already?
Not yet. The closed beta is in preparation. On the waitlist you tell us which systems you want to connect; we hand out the first places by demand.
How much does XenMCP cost?
The beta is free. We will announce pricing for the time after the beta before it ends; beta users hear first.
Does it work in the Claude app on my phone?
Yes, that is one of the main reasons for XenMCP. Local MCP servers only run on the computer that starts them. A server under a XenMCP address is added to Claude once as a connector and then works in the browser, in the desktop app and on your phone.
My MCP server wants an API key. How do I use it safely in Claude?
Claude custom connectors can now send headers with a key – depending on the plan and still in beta. Then everyone shares the same key, though. With the XenMCP OAuth bridge the key stays encrypted with us, everyone signs in individually, access can be revoked per person, and the log shows who called which tool.
Does my data leave Germany?
Your credentials never leave XenMCP, and XenMCP itself runs in Germany without storing content. The results of your queries do go to the AI client you use – with Claude, to Anthropic in the US. To keep everything in the EU, use a European client: Mistral’s Le Chat, the Xenaxio assistant or your own model.
How safe is connecting my database?
We recommend a dedicated read-only user and a firewall rule that only allows XenMCP’s fixed IP address. Database servers in the catalog are read-only by default; write tools exist only if you enable them, and Claude asks before every call.
Can I host my own MCP server?
Yes, that is planned: from an npm package, a Docker image or a GitHub repository, even if the server only speaks stdio. At beta launch we focus on the catalog and the OAuth bridge.
Is there a data processing agreement (DPA)?
Yes, we offer a DPA (AVV) to companies. Write to us if you need it already for the beta.
Who is behind XenMCP?
XenMCP is a product of Xenaxio (ESSOTEC, LLC), the provider of the AI workspace xenaxio.com with email, calendar and files. Both products share the company and data protection standards but run on separate infrastructure.
Ready for your first connector?
The beta is free. Sign up and tell us which systems you want to connect.
Join the waitlist