validate?type=isbn&value=0306406152

Checks the check digit and structure of an identifier with no network call: ISBN-10 and ISBN-13 (with ISBN-10 to 13 conversion), EAN-8, UPC-A, EAN-13 and GTIN-14 (with the GS1…

Checks the check digit and structure of an identifier with no network call: ISBN-10 and ISBN-13 (with ISBN-10 to 13 conversion), EAN-8, UPC-A, EAN-13 and GTIN-14 (with the GS1 prefix country), VIN (manufacturer code, region, model year), IMEI, ISIN (country) and a generic Luhn number. type=auto detects the type. Up to 50 comma-separated values give a results array.

UNRATEDListed

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.001 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0xaca92e43…7a2435da

URL

https://api.sitecheck-api.workers.dev/api/validate?type=isbn&value=0306406152

MCP server on this host: io.github.bck-stack/sitecheck

Seen

first 9 days ago · last 16 hr ago

9 free handshakes

Payment

Pays through

x402

Offered on?

Arc, Base USDC, Solana, xrpl:0

Listed on?

Base, Solana

Paid calls

No paid calls yet.

Delivery is unknown until someone pays. A handshake only shows it asks for payment.

Paid for on the same host1 of 225 endpoints at api.sitecheck-api.workers.dev

Other endpoints on api.sitecheck-api.workers.dev that were paid for
Endpoint	Grade	Paid calls	Last result	Last seen
GET /api/contacts?url=plausible.io	UNRATED	1	delivered	16 hr ago

All 225 endpoints on this host

Verify it yourselfnpx teppi-check https://api.sitecheck-api.workers.dev/api/validate?type=isbn&value=0306406152curl -s https://api.teppi.xyz/v1/trust/cap_01M4WF5CZ10HHWTCVD3MX5P9JX