Validates IBAN/ISBN/EAN/Luhn checksums and finds the one wrong digit
Free
6 MCP servers
Developer Tools & ReposWorks with OpenAI Agents SDKBy gumballtools
ISO 8601 week numbers: date to week, week to date, weeks-per-year.
Free
Convert JSON samples into TypeScript interfaces and Zod schemas, with inference caveats.
Free
Validate JSON, YAML, XML and CSV with exact line/column errors and silent-corruption warnings.
Free
Explain a regex in plain English and detect catastrophic backtracking risk.
Free
Convert times between IANA zones and detect skipped or ambiguous DST local times.
Free