{"slug":"sovereign-x402-zeta-vercel-app-api-v1-sequence-catalan-7dfcae76","name":"sovereign-x402-zeta.vercel.app/api/v1/sequence/catalan","summary":"Calculate the nth Catalan number.","status":"live","indexable":true,"listed_since":"2026-10-25T17:57:21.431936Z","sources":[{"source":"x402_bazaar","external_id":"https://sovereign-x402-zeta.vercel.app/api/v1/sequence/catalan","owner_address":"0x41595e02275629126ad11551e39ee9ac8531ad3c","seen_at":"2026-10-26T22:09:41.839024Z","removed_at":null}],"endpoints":[{"url":"https://sovereign-x402-zeta.vercel.app/api/v1/sequence/catalan","host":"sovereign-x402-zeta.vercel.app","protocol":"x402","state":"live","last_probe_at":"2026-10-26T09:51:52.936614Z","last_ok_at":"2026-10-26T09:51:52.936614Z","tools_count":null,"tools_changed_at":null,"uptime_24h":1.0,"uptime_30d":1.0}],"also_listed_as":[{"slug":"sovereign-x402-zeta-vercel-app-7a05a444","name":"sovereign-x402-zeta.vercel.app"}],"payment_options":[{"endpoint_url":"https://sovereign-x402-zeta.vercel.app/api/v1/sequence/catalan","network":"eip155:8453","scheme":"exact","rail":"exact","asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","coin":"USDC","asset_label":"USD Coin","amount":"1000","pay_to":"0x41595e02275629126ad11551e39ee9ac8531ad3c","observed_at":"2026-10-26T09:51:52.936614Z"}],"usage":{"source":"x402_bazaar","unique_payers_30d":3,"paid_calls_30d":3,"last_paid_at":"2026-10-08T21:16:50.538Z","reported_at":"2026-10-26T22:09:41.839024Z"},"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 1 days; 30 are needed."},{"id":"real_customers","state":"fail","reason":"3 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":"2026-10-27T00:07:51.472187Z"},"identity":{"endpoint_domains":["sovereign-x402-zeta.vercel.app"],"proven_domains":[],"proven_wallets":[],"namesakes":[],"namesake_count":0,"identity_checks":[],"wallet_attestations":[]},"replies":[],"customers":null,"scan":null,"notice":"Not affiliated with addrbook — claim or request removal."}