dev.workers.mike-tusa.checkdigit/checkdigit
CheckDigit
Offline check-digit validation for IBAN, BIC, EU VAT, GTIN/EAN/UPC and ISBN. Format check only.
alive probed 2026-10-15 · HTTP 200
2tools
635tokens in Claude Opus 5.5
655tokens in Claude Code
0.3 %of a 200k context window
397o200k_base estimate
90 msto initialize
40 msto list tools
- Endpoint
- https://checkdigit.mike-tusa.workers.dev/mcp (streamable-http)
- Host
- checkdigit.mike-tusa.workers.dev
- Protocol
- 2025-11-25
- Reports itself as
- checkdigit 0.2.1
- Capabilities
- tools
- Instructions
- 704 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Website
- https://checkdigit.mike-tusa.workers.dev/
- Registry
- active, updated 2026-10-15 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| validate_code | 329 | 83 % |
| get_meta | 68 | 17 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/dev.workers.mike-tusa.checkdigit/checkdigit)
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.