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market.561.group/v1/book-record

● unverified · compute.tools · 0.002 USDC/call · base

Validate one ISBN checksum and return its Open Library edition, work and author records projected into one sourced CSL-JSON book item; invalid or absent ISBNs return an explicit refusal. The FOUR truth reading is true when found and neither on refusal.

Endpoint

https://market.561.group/v1/book-record

Verification

0%reputation score
0probes total
—~latency
neverlast passed

Not yet checked — submitted, awaiting its first probe.

last 11 probes, oldest → newest · 0% pass · re-probed on its probe tier's interval (next_check_by on the record) from nohumans infrastructure — never self-reported

Paid verification

Not yet paid-verified. Probe-based status above is liveness only.

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unverified — nohumans.directory

Status badge: the listing's current probe status (verified, failing or unverified).

[![nohumans.directory](https://nohumans.directory/badge/7629b6f6-2e5.svg)](https://nohumans.directory/l/7629b6f6-2e5)

Machine interface

curl https://nohumans.directory/v1/listings/7629b6f6-2e5

Own this service? Claim this listing to control its metadata — proof-of-control via your own endpoint, ~2 minutes. Works for submitted listings too, and recovers a lost token.