Invoice XML MCP Server

A Model Context Protocol server that exposes the InvoiceXML API to AI agents. Covers Factur-X, ZUGFeRD, XRechnung, UBL / CII, and Peppol BIS Billing 3.0. It is available as a remote MCP endpoint.

Teams that want a hosted finance endpoint instead of running a local process. The project is written in C#.

VERIFIED ACTIVE

LAST COMMIT 2026-07-20 · ★ 5 · #257 OF 283 MAINTAINED FINANCE · VERIFIED 2026-08-25

MIT · C# · how we verify → /methodology

01 · Install Invoice XML

before you install - you'll need

The README does not document required environment variables for a basic install.

Claude Code

claude mcp add invoicexml-invoicexml-mcp --transport http https://mcp.invoicexml.com

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "invoicexml-invoicexml-mcp": {
      "url": "https://mcp.invoicexml.com"
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

https://mcp.invoicexml.com

transport: streamable-http

endpoint alive - authentication required · probed 2026-08-25

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as remote - your agent's requests go to mcp.invoicexml.com

endpoint auth requires authentication - rejected our unauthenticated MCP initialize

license MIT - declared in the repository

registry vendor namespace com.invoicexml - domain-verified with the official MCP registry

03 · Who maintains Invoice XML

InvoiceXML is maintained by invoicexml. It's the only MCP server we track from this author; the repo dates to May 2026.

04 · Facts

repository: github.com/invoicexml/invoicexml-mcp
website: https://www.invoicexml.com/mcp-server
category: finance - ranked #257 of 283 actively-maintained finance servers as of 2026-08-25.
registry: com.invoicexml/invoicexml (active, first published 2026-05-29)

05 · Invoice XML FAQ

What is Invoice XML?

A Model Context Protocol server that exposes the InvoiceXML API to AI agents. Covers Factur-X, ZUGFeRD, XRechnung, UBL / CII, and Peppol BIS Billing 3.0. It is available as a remote MCP endpoint.

Is Invoice XML still maintained?

Yes - as of 2026-08-25, its last commit was 2026-07-20. We re-verify nightly.

How do I install Invoice XML?

Run `claude mcp add invoicexml-invoicexml-mcp --transport http https://mcp.invoicexml.com`. The README does not document required environment variables for a basic install. You can also paste the ready-made client config above.

Does Invoice XML require authentication?

Yes - when we probed the endpoint on 2026-08-25, it rejected an unauthenticated MCP initialize; you'll need credentials to connect.

06 · Alternatives to Invoice XML

Alternatives to Invoice XML

Maintained finance servers if Invoice XML isn't the fit.

Pairs well with

Servers that cover what Invoice XML doesn't - only shown when the pairing reason fits the companion.

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