info.mdb-group/b2b-check
MDB B2B Check
Is the MDB B2B Check MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-15.
Checks EU VAT IDs, Swiss UIDs, EORI, Peppol, LEI, IBAN/BIC and company registers, with source.
alive probed 2026-11-15 · HTTP 200
- Endpoint
- https://b2b.mdb-group.info/mcp (streamable-http)
- Host
- b2b.mdb-group.info
- Protocol
- 2025-11-25
- Reports itself as
- b2b-check 0.6.1
- Capabilities
- prompts, tools
- Instructions
- 3 504 characters
- Of a 1M window
- 0.8 % of a 1M context window
- Count
- 8.2k tokens in Claude Opus 5.5, exact, measured 2026-11-14. With the Claude Code prefix mcp__…__ on each tool name: 8.4k. The o200k_base estimate is 4.9k. Counted again when the tool definitions change. Method.
- Website
- https://b2b.mdb-group.info/
- Registry
- active, updated 2026-11-14 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.66×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| calculate_late_interest | 801 | 482 | 10 % |
| check_vat_id | 673 | 405 | 8 % |
| check_registered_bank_account | 622 | 374 | 8 % |
| find_peppol_participant | 612 | 368 | 7 % |
| check_company_register | 603 | 363 | 7 % |
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Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.
Fixed something? Probe it now, with the same steps as the daily run. This page updates with the next daily run.