x402-toolbox ISBN Validator

x402

x402-toolbox ISBN Validator is a paid API for AI agents from x402-toolbox.shablony-pro.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-29).

Validates whether a given ISBN (International Standard Book Number) string is correctly formatted and legitimate

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.

Output

Returns a JSON object with an 'ok' boolean indicating whether the endpoint call succeeded and a 'paid' boolean confirming the x402 micropayment was processed, along with the ISBN validation result indicating whether the provided ISBN is correctly formatted and passes checksum verification.

Example use cases

Bookstore inventory data check

“Before I add these books to my inventory system, can you validate that this ISBN '0-306-40615-2' is correctly formatted and valid?”

Publisher metadata QA pipeline

“We're importing a catalog of book records — can you verify that ISBN '9780743273565' is a legitimate, well-formed ISBN before we commit it to the database?”

User-submitted book entry validation

“A user just entered '978-0-13-110362-7' as the ISBN for their book listing — can you confirm whether that's a valid ISBN so we can accept or reject their submission?”

Technical details

Endpoint

GEThttps://x402-toolbox.shablony-pro.workers.dev/validation/isbn-validator?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a lightweight, no-signup, pay-per-call ISBN validation without managing API keys or accounts. Ideal for AI agents performing one-off or low-volume book identifier checks where the x402 micropayment model fits — especially in automated pipelines ingesting bibliographic data where ISBN integrity must be confirmed cheaply and programmatically.

Side effects

Invalid or missing schema/ISBN input returns an error or ok:false
Malformed ISBN that fails checksum returns validation failure
Payment failure via x402 protocol results in unpaid/unauthorized response
Ambiguous input format (missing hyphens, wrong length) may yield false negatives

Input

Schema · Request body

Field	Type	Description
schema	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "paid": true
  }
}

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