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ISBN Validation API
x402
ISBN Validation API is a paid API for AI agents from api.aventtech.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Validates ISBN-10 or ISBN-13 numbers, returning whether the identifier is valid and its kind
Price / call$0.002
Success—
StatusUnknown
How this service works
Unified digital experiences for Mega Yachts, Executive Spaces, and Luxury Residences. Athens-based, nationwide projects.
Output
A JSON object with 'kind' (e.g. 'ISBN-13' or 'ISBN-10') and 'valid' (boolean) indicating whether the provided ISBN passes structural and check-digit validation.
Example use cases
Verify book ISBNs for online catalog
“I'm uploading a bunch of books to our store. Can you validate each of these ISBNs and let me know which ones are actually valid before I list them?”
Convert and validate ISBN formats
“We have some older ISBN-10 codes in our inventory system. Can you check if they're valid and convert them to ISBN-13 format so we can sync with our distributor?”
Catch ISBN errors during data entry
“My team manually entered ISBNs from book jackets into our database. Can you scan through and flag any that don't pass validation so we can fix the typos?”
Technical details
Endpoint
GEThttps://api.aventtech.com/validate/isbnWhen to prefer
Use this endpoint when you need to validate a book ISBN (ISBN-10 or ISBN-13) including check-digit verification, and need to identify which ISBN format is used. Prefer this over generic barcode validators (e.g. GTIN/EAN) when the identifier is specifically a book ISBN and format classification is needed.
Side effects
- Missing 'isbn' query parameter returns error
- Non-ISBN string (letters, wrong length) returns valid:false
- Network timeout or server error returns HTTP 5xx
- Malformed request schema returns HTTP 400
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"kind": "ISBN-13",
"valid": true
}
}Tags
x402
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