Endpoint · computeGETapi.aventtech.com /validate/isbn ?isbn=9780306406157
ISBN validation: ISBN-10 and ISBN-13 check digits, with automatic ISBN-10 to ISBN-13 conversion for valid inputs.
Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.01 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://api.aventtech.com/validate/isbn?isbn=9780306406157
Seen
first 7 days ago · last 10 hr ago
12 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC
Listed on?
Base
Handshakescomputed 20 hr ago
0.624 from 11 free handshakes over 30 days · UNRATED ?
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 1.00 | 0.442 | 0.265 | 0 | −0.335 | |
| latency p95 it answered as fast as its class |
0.20 | 0.80 | 0.796 | 0.159 | −0.041 | 0 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.624 | gap to 1.000 = 0.376 · 0.041 short · 0.335 uncertain | 0.624 | −0.041 | −0.335 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
BURN_INFREE_TIER_ONLY
Verify it yourself
npx teppi-check https://api.aventtech.com/validate/isbn?isbn=9780306406157curl -s https://api.teppi.xyz/v1/trust/cap_01M3GP9D1BE2ENJ4DRRS4P0YFT