{"slug":"usaref-n-america-reference-7f75e79c","name":"Usaref - N America reference","summary":"Tax-ID / VAT-number validation for North American countries: valid/invalid, normalised form, id type and the reason it failed. Format plus the official check-digit algorithm where the tax authority publishes one; every rule cited to an official source with its date. Pure algorithmic, no registry lookup","status":"live","indexable":true,"listed_since":"2026-10-25T17:53:01.270852Z","sources":[{"source":"x402_bazaar","external_id":"https://usaref.dev/v1/taxid/validate","owner_address":"0x1f0409ccd20a2fb497d4decef4e17e9d0688fea6","seen_at":"2026-10-26T17:13:11.443921Z","removed_at":null}],"endpoints":[{"url":"https://usaref.dev/v1/taxid/validate","host":"usaref.dev","protocol":"x402","state":"live","last_probe_at":"2026-10-26T00:09:13.168703Z","last_ok_at":"2026-10-26T00:09:13.168703Z","tools_count":null,"tools_changed_at":null,"uptime_24h":1.0,"uptime_30d":1.0}],"also_listed_as":[{"slug":"usaref-dev-1b166f6c","name":"usaref.dev"}],"payment_options":[],"usage":{"source":"x402_bazaar","unique_payers_30d":2,"paid_calls_30d":5,"last_paid_at":"2026-10-24T23:11:14.556Z","reported_at":"2026-10-26T17:13:11.443921Z"},"assessment":{"method":"2026.10.1","checks":[{"id":"answers","state":"pass","reason":"Answered a check 14 hours ago."},{"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 0 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":1,"applicable":4,"contradicted":false,"computed_at":"2026-10-26T14:49:45.426174Z"},"identity":{"endpoint_domains":["usaref.dev"],"proven_domains":[],"proven_wallets":[],"namesakes":[{"slug":"usaref-n-america-reference-60fad8a2","name":"Usaref - N America reference","proven_domain":null},{"slug":"usaref-n-america-reference-75332ede","name":"Usaref - N America reference","proven_domain":null},{"slug":"usaref-n-america-reference-baea44a5","name":"Usaref - N America reference","proven_domain":null},{"slug":"usaref-n-america-reference-97060b8f","name":"Usaref - N America reference","proven_domain":null},{"slug":"usaref-n-america-reference-f559da84","name":"Usaref - N America reference","proven_domain":null},{"slug":"usaref-n-america-reference-67f95dbe","name":"Usaref - N America reference","proven_domain":null},{"slug":"usaref-n-america-reference-f9cc351f","name":"Usaref - N America reference","proven_domain":null},{"slug":"usaref-n-america-reference-c5109e62","name":"Usaref - N America reference","proven_domain":null},{"slug":"usaref-n-america-reference-60cd849b","name":"Usaref - N America reference","proven_domain":null},{"slug":"usaref-n-america-reference-daa17044","name":"Usaref - N America reference","proven_domain":null}],"namesake_count":23},"replies":[],"customers":null,"scan":null,"notice":"Not affiliated with addrbook — claim or request removal."}