# Validate an ISBN checksum

Validate ISBN-10/ISBN-13 identifiers using checksum rules and return normalized digits.

This intent maps to the canonical capability `isbn_validate`.

## Canonical page

https://agentbits.dev/tools/isbn-validate

## MCP

`isbn_validate`

## HTTP

`POST https://agentbits.dev/v1/isbn/validate`

## Pricing

Free