Endpoint · computeGETdata.greeneris.io /v1/books/isbn ?isbn=9780140328721
Resolves an ISBN-10 or ISBN-13 to a normalized bibliographic record from Open Library (Internet Archive): title, authors, publishers, publish date, page count, ISBN identifiers…
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Resolves an ISBN-10 or ISBN-13 to a normalized bibliographic record from Open Library (Internet Archive): title, authors, publishers, publish date, page count, ISBN identifiers, subjects and cover image URL. Query: ?isbn=9780140328721 (hyphens/spaces tolerated). Unknown ISBNs return 400 (not charged). 7-day cache. Built for catalog management, e-commerce listings and used-book pricing agents.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://data.greeneris.io/v1/books/isbn?isbn=9780140328721
MCP server on this host: io.github.contentfactory/eu-verify
Seen
first 35 days ago · last 16 hr ago
64 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC
Listed on?
Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.797 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held down by latency p95 · gap to 1.000 is 0.203: 0.066 uncertain ? + 0.137 short ? · 0.003 to B
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| latency p95costs the most it answered as fast as its class |
0.20 | 0.32 | 0.305 | 0.061 | −0.137 | −0.002 | |
| liveness it answered at all |
0.60 | 1.00 | 0.894 | 0.536 | 0 | −0.064 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.797 | gap to 1.000 = 0.203 · 0.137 short · 0.066 uncertain | 0.797 | −0.137 | −0.066 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.200 × 0.305 latency p95
+ 0.600 × 0.894 liveness
+ 0.200 × 1.000 price stability
= 0.797 → UNRATED: 58 of 30 paid calls weights 2026.09.6 · 58 samples · seed cap_01M1A59Y8YG5T3D3TPMQBA2KKJ|2026-09-02T09:32:41.189Z|2026.09.6
Verify it yourself
npx teppi-check https://data.greeneris.io/v1/books/isbn?isbn=9780140328721curl -s https://api.teppi.xyz/v1/trust/cap_01M1A59Y8YG5T3D3TPMQBA2KKJ