dev.invowerk/xrechnung-e-invoice-validator
invowerk
E-invoice checker for ZUGFeRD, Factur-X, XRechnung and Peppol BIS. Free web tool, API and MCP.
alive probed 2026-10-05 · HTTP 200
6tools
4.1ktokens in Claude Opus 5.5
4.2ktokens in Claude Code
2.0 %of a 200k context window
2.5ko200k_base estimate
1.2 sto initialize
398 msto list tools
- Endpoint
- https://api.invowerk.dev/mcp/ (streamable-http)
- Host
- api.invowerk.dev
- Protocol
- 2025-11-25
- Reports itself as
- invowerk 1
- Capabilities
- experimental, extensions, logging, prompts, resources, tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/invowerk-dev/invowerk
- Website
- https://invowerk.dev/en/
- Registry
- active, updated 2026-10-04 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| validate_invoice | 553 | 22 % |
| convert_invoice | 454 | 18 % |
| render_invoice | 438 | 17 % |
| parse_invoice | 414 | 17 % |
| generate_invoice | 338 | 13 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-05 13:58 | alive | 1.2 s | 6 | 4.1k | 2.5k |
| 2026-10-05 00:24 | alive | 461 ms | 6 | 2.5k | |
| 2026-10-04 10:00 | alive | 658 ms | 6 | 2.5k | |
| 2026-10-04 07:53 | alive | 731 ms | 6 | 2.5k | |
| 2026-10-03 20:33 | alive | 1.1 s | 6 | 2.5k | |
| 2026-10-03 17:50 | alive | 206 ms | 6 | 2.5k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/dev.invowerk/xrechnung-e-invoice-validator)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.