{"slug":"email-address-check-a0c8c6ac","name":"Email Validation","summary":"Use when an agent needs email validation before sending or saving a signup: RFC syntax and normalisation, live DNS (domain exists, MX, accepts mail, null MX), disposable-domain and role-account (info@, support@) flags. No SMTP probing and no mail sent, so it cannot prove a mailbox exists. $0.01 USDC on Base; charged only on 2xx, never for invalid input.","status":"live","headings":[{"slug":"email-messaging","title":"Email & messaging"},{"slug":"companies-people","title":"Companies, domains & people data"}],"indexable":true,"listed_since":"2026-10-30T18:38:36.859147Z","sources":[{"source":"x402_bazaar","external_id":"https://api.facts402.com/email","owner_address":"0x5498b0aa90cd56f8962cbd136df3d3769c85f149","seen_at":"2026-11-10T10:13:17.813860Z","removed_at":null}],"endpoints":[{"url":"https://api.facts402.com/email","host":"api.facts402.com","protocol":"x402","state":"live","last_probe_at":"2026-11-09T09:26:41.125581Z","last_ok_at":"2026-11-09T09:26:41.125581Z","tools_count":null,"tools_changed_at":null,"uptime_24h":null,"uptime_30d":1.0}],"also_listed_as":[{"slug":"api-facts402-com-8d92885a","name":"api.facts402.com"}],"payment_options":[{"endpoint_url":"https://api.facts402.com/email","network":"eip155:8453","scheme":"exact","rail":"exact","asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","coin":"USDC","asset_label":"USD Coin","amount":"10000","pay_to":"0x5498b0aa90cd56f8962cbd136df3d3769c85f149","observed_at":"2026-11-09T09:26:41.125581Z"}],"usage":{"source":"x402_bazaar","unique_payers_30d":1,"paid_calls_30d":2,"last_paid_at":"2026-11-02T22:30:57.987Z","reported_at":"2026-11-10T10:13:17.813860Z"},"assessment":{"method":"2026.11.2","checks":[{"id":"answers","state":"pass","reason":"Answered a check 24 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 10 days; 30 are needed."},{"id":"real_customers","state":"fail","reason":"1 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":"2026-11-10T09:50:24.454248Z"},"identity":{"endpoint_domains":["facts402.com"],"proven_domains":[],"proven_wallets":[],"namesakes":[{"slug":"email-validation-dc87920a","name":"Email Validation","proven_domain":null},{"slug":"email-validation-vextorium-ad45975a","name":"Email validation","proven_domain":null}],"namesake_count":2,"identity_checks":[],"wallet_attestations":[],"human_backings":[]},"replies":[],"customers":null,"scan":null,"notice":"Not affiliated with addrbook — claim or request removal."}