Endpoint · computePOSTcheckdigit.openverbs.com /v1/isbn
Validate an ISBN-10 (mod-11, trailing X allowed) or ISBN-13 (GTIN mod-10) book number.
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Validate an ISBN-10 (mod-11, trailing X allowed) or ISBN-13 (GTIN mod-10) book number. Length after removing spaces/hyphens selects the scheme.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.002 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://checkdigit.openverbs.com/v1/isbn
Seen
first 28 days ago · last 15 hr ago
52 free handshakes
Payment
Pays through
x402 · MPP evm, tempo
Offered on?
Base USDC, Tempo 0x8335…2913
Listed on?
Base
Paid calls
No paid calls yet.
Delivery is unknown until someone pays. A handshake only shows it asks for payment.
Verify it yourself
npx teppi-check https://checkdigit.openverbs.com/v1/isbncurl -s https://api.teppi.xyz/v1/trust/cap_01M1TKXTH085G53M9VP9Y4CBT8