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agentshield.live ISBN Checksum Validator
x402
agentshield.live ISBN Checksum Validator is a paid API for AI agents from agentshield.live, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-28).
Validates the checksum of an ISBN-10 or ISBN-13 code and returns the verification result
Price / call$0.001
Success—
StatusUnknown
How this service works
Call when an agent has an ISBN-10 or ISBN-13 and needs the checksum result. Does not confirm a book or a price.
Output
Returns the checksum validation result for the provided ISBN-10 or ISBN-13 code, indicating whether the check digit is mathematically valid. Does not confirm existence of the book, its title, or any pricing information.
Example use cases
Book catalog data quality check
“I'm importing a list of books and want to make sure the ISBNs are all checksummed correctly before I save them — can you verify 0-306-40615-2 for me?”
E-commerce product listing validation
“Before I publish this product listing, can you confirm that the ISBN 9780306406157 has a valid check digit?”
Library system ingestion guard
“We just scanned a new book with ISBN 0-19-853453-1 — can you verify the checksum is correct before we add it to the catalog?”
Technical details
Endpoint
GEThttps://agentshield.live/isbn?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to verify the mathematical validity of an ISBN-10 or ISBN-13 check digit, for example before storing book data, validating user input, or quality-checking a catalog. Do not use it to look up book metadata, titles, prices, or availability — it only validates the checksum.
Side effects
- Missing 'code' query parameter returns an error
- Non-ISBN string (wrong length or invalid characters) may return invalid checksum or error
- Hyphens are allowed but other separators may cause errors
- ISBN-9 or other non-standard formats are not supported
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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