{"slug":"book-record-0ed73ba9","name":"book-record","summary":"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.","status":"unreachable","indexable":false,"listed_since":"2026-10-25T17:51:24.535920Z","sources":[{"source":"x402_bazaar","external_id":"https://market.561.group/v1/book-record","owner_address":"0x32886f6f361c1d570255c2762967a2e41d0e9b1a","seen_at":"2026-11-02T19:12:43.296497Z","removed_at":null}],"endpoints":[{"url":"https://market.561.group/v1/book-record","host":"market.561.group","protocol":"x402","state":"unreachable","last_probe_at":"2026-11-02T08:58:48.836780Z","last_ok_at":null,"tools_count":null,"tools_changed_at":null,"uptime_24h":null,"uptime_30d":0.0}],"also_listed_as":[{"slug":"market-561-group-4528b9ae","name":"market.561.group"}],"payment_options":[],"usage":{"source":"x402_bazaar","unique_payers_30d":2,"paid_calls_30d":2,"last_paid_at":"2026-10-24T13:18:40.200Z","reported_at":"2026-11-02T19:12:43.296497Z"},"assessment":{"method":"2026.10.2","checks":[{"id":"answers","state":"fail","reason":"Has not answered a check yet."},{"id":"owner","state":"fail","reason":"No one has proven control of its domain or of the wallet it is paid at."},{"id":"track_record","state":"fail","reason":"Listed for 8 days; 30 are needed."},{"id":"real_customers","state":"fail","reason":"2 different wallets paid it in 30 days, as the x402 Bazaar reports (not yet counted by addrbook); 10 are needed."},{"id":"clean_scan","state":"not_applicable","reason":"Not an MCP server."}],"passed":0,"applicable":4,"contradicted":false,"computed_at":"2026-11-03T00:40:37.506121Z"},"identity":{"endpoint_domains":["561.group"],"proven_domains":[],"proven_wallets":[],"namesakes":[],"namesake_count":0,"identity_checks":[],"wallet_attestations":[],"human_backings":[]},"replies":[],"customers":null,"scan":null,"notice":"Not affiliated with addrbook — claim or request removal."}