Checksum Validator for ChatGPT

com.apished/checksum-validator

Validates Luhn, IBAN, ISBN, EAN/UPC, SWIFT/BIC, and EU VAT checksums and formats.

client:ChatGPT transport:streamable-http tools:6

Install Checksum Validator in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://apished.com/mcp/v1/checksum

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs