com.gumballtools/check-digit
Check Digit Validator
com.gumballtools/check-digit costs 628 tokens of context per session. It has 1 tool definitions. That is 0.3 % of a 200k window. Measured 2026-10-03.
Validates IBAN/ISBN/EAN/Luhn checksums and finds the one wrong digit
alive probed 2026-10-03 · HTTP 200
1tools
628tokens for the tool definitions
0.3 %of a 200k context window
1.6 sto initialize
127 msto list tools
- Endpoint
- https://check-digit.gumballtools.com/api/mcp (streamable-http)
- Host
- check-digit.gumballtools.com
- Protocol
- 2025-11-25
- Reports itself as
- check-digit 0.1.0
- Capabilities
- tools
- Instructions
- none
- Repository
- https://github.com/bwalvoord/gumball
- Website
- https://check-digit.gumballtools.com
- Registry
- active, updated 2026-09-05 · registry entry
- Reachable
- 2 of the last 2 probes
Most expensive tools
| Tool | Tokens | Share of this server |
|---|---|---|
| run | 628 | 100 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Tokens |
|---|---|---|---|---|
| 2026-10-03 20:30 | alive | 1.6 s | 1 | 628 |
| 2026-10-03 17:48 | alive | 1.0 s | 1 | 628 |
Badge
[](https://mcp-pulse.ulehla.dev/s/com.gumballtools/check-digit)