{"data":{"slug":"x402-format-checker","name":"x402 Format Checker","description":"Format and checksum validation for IBAN, EU VAT, Polish NIP/REGON/PESEL and email, pay-per-call via x402. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base. POST JSON {\"value\": \"...\"}; values are never stored and personal identifiers are masked. Also a remote MCP server (/mcp) and A2A agent (/.well-known/agent-card.json).","base_url":"https://x402-test.crewofthecaptain.com","website_url":"https://x402-test.crewofthecaptain.com/","category":"Verification","endpoint_count":6,"min_price_usd":0.001,"uptime_24h":100,"source":"submitted","status":"online","verified":false,"verified_until":null,"payment_ready":true,"payment_ready_until":"2026-10-21T14:00:08.547Z","last_success_at":"2026-10-14T14:00:08.547Z","consecutive_failures":0,"check_interval_minutes":15,"last_checked_at":"2026-10-14T14:00:08.547Z","created_at":"2026-10-14T10:47:13.217Z","uptime":{"24h":100,"7d":100,"30d":100,"90d":100,"coverage":{"24h":{"daysCovered":1,"checkCount":9},"7d":{"daysCovered":1,"checkCount":9},"30d":{"daysCovered":1,"checkCount":9},"90d":{"daysCovered":1,"checkCount":9}}},"avg_response_time_ms":408,"total_checks":13,"networks":["BSE"],"networks_caip2":["eip155:8453"],"asset":"USDC","endpoints":[{"id":"1782b16a-d7a2-4466-9df0-cf77dc1cb218","method":"GET","path":"/api/validate/email","description":null,"mime_type":null,"is_active":true,"first_seen_at":"2026-10-14T10:47:13.217Z","last_seen_at":"2026-10-14T14:00:08.537Z","variable_amount":false,"min_price_usd":0.001,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"1000","price_usd":"0.0010000000","pay_to":"0xACeaEeBF0Dc8DC7762F2FdE4885f219888e9D045","max_timeout_seconds":60}]},{"id":"d45d33d1-2d3f-4023-a4be-d45a565c7129","method":"GET","path":"/api/validate/eu-vat","description":null,"mime_type":null,"is_active":true,"first_seen_at":"2026-10-14T10:47:13.217Z","last_seen_at":"2026-10-14T14:00:08.503Z","variable_amount":false,"min_price_usd":0.001,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"1000","price_usd":"0.0010000000","pay_to":"0xACeaEeBF0Dc8DC7762F2FdE4885f219888e9D045","max_timeout_seconds":60}]},{"id":"8c744789-f737-403f-816e-3d7d6646befb","method":"GET","path":"/api/validate/iban","description":null,"mime_type":null,"is_active":true,"first_seen_at":"2026-10-14T10:47:13.217Z","last_seen_at":"2026-10-14T14:00:08.436Z","variable_amount":false,"min_price_usd":0.001,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"1000","price_usd":"0.0010000000","pay_to":"0xACeaEeBF0Dc8DC7762F2FdE4885f219888e9D045","max_timeout_seconds":60}]},{"id":"3c12566d-6b06-4b0b-a1f7-f231b02ab943","method":"GET","path":"/api/validate/pl-nip","description":null,"mime_type":null,"is_active":true,"first_seen_at":"2026-10-14T10:47:13.217Z","last_seen_at":"2026-10-14T14:00:08.517Z","variable_amount":false,"min_price_usd":0.001,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"1000","price_usd":"0.0010000000","pay_to":"0xACeaEeBF0Dc8DC7762F2FdE4885f219888e9D045","max_timeout_seconds":60}]},{"id":"12c02027-5107-4865-a9a2-61b686d971c2","method":"GET","path":"/api/validate/pl-pesel","description":null,"mime_type":null,"is_active":true,"first_seen_at":"2026-10-14T10:47:13.217Z","last_seen_at":"2026-10-14T14:00:08.530Z","variable_amount":false,"min_price_usd":0.001,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"1000","price_usd":"0.0010000000","pay_to":"0xACeaEeBF0Dc8DC7762F2FdE4885f219888e9D045","max_timeout_seconds":60}]},{"id":"42e95ffd-b25a-4d92-87c7-2382f6bf465f","method":"GET","path":"/api/validate/pl-regon","description":null,"mime_type":null,"is_active":true,"first_seen_at":"2026-10-14T10:47:13.217Z","last_seen_at":"2026-10-14T14:00:08.524Z","variable_amount":false,"min_price_usd":0.001,"networks":["BSE"],"pricing":[{"scheme":"exact","network":"eip155:8453","network_caip2":"eip155:8453","asset_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_address_norm":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USDC","price":"1000","price_usd":"0.0010000000","pay_to":"0xACeaEeBF0Dc8DC7762F2FdE4885f219888e9D045","max_timeout_seconds":60}]}],"assessment":{"updated_at":"2026-10-14T10:53:56.895Z","input_hash":"45c249833f92bf7733a8cd5517ec77e7dbbdde6a1d275a3da54b7bfa90820020","model_id":null,"prompt_version":null,"reliability":{"uptime":{"24h":null,"7d":null,"30d":null,"90d":null},"response_p95_ms":580,"avg_response_ms":580,"last_checked_at":"2026-10-14T10:48:03.688Z","consecutive_failures":-1,"total_checks":1},"compliance":{"grade":"A","passed":14,"total":14,"checks":[{"id":"payload_captured","label":"402 payload captured","pass":true},{"id":"accepts_present","label":"accepts[] array present","pass":true},{"id":"payto_recoverable","label":"payTo address recoverable","pass":true},{"id":"payto_conformant","label":"payTo at accepts[0].payTo (conformant shape)","pass":true},{"id":"payto_shape","label":"payTo is a valid on-chain address","pass":true},{"id":"price_present","label":"atomic price declared","pass":true},{"id":"price_sane","label":"atomic price in a sane range","pass":true},{"id":"asset_declared","label":"asset (token) address declared","pass":true},{"id":"network_caip2","label":"network resolves to CAIP-2","pass":true},{"id":"scheme_declared","label":"payment scheme declared","pass":true},{"id":"transport_https","label":"served over HTTPS","pass":true},{"id":"x402_version_current","label":"declares the current x402 version (2)","pass":true},{"id":"eip712_domain_extra","label":"EIP-712 domain parameters present on every EVM entry","pass":true},{"id":"version_channel_coherent","label":"x402 v2 envelope delivered in the payment-required header","pass":true}],"pay_to_source":"payTo","pay_to_location":"accept","staleness":{"probe_failing":false,"last_success_at":"2026-10-14T14:00:08.547Z","envelope_captured_at":"2026-10-14T10:48:03.688Z"}},"site":{"homepage":true,"openapi":true,"pricing":false,"llms_txt":true,"robots":true,"terms":false,"checked_at":"2026-10-14T10:53:55.906Z"},"domain":{"age_days":3,"registrar":"Cloudflare, Inc.","free_host":false,"created_date":"2026-10-10T18:30:37.000Z","checked_at":"2026-10-14T10:53:56.737Z"},"economics":{"price_usd":0.001,"price_atomic":"1000","model":"flat","category_percentile":7,"stability":1,"price_max_usd":0.001,"category_percentile_max":2,"endpoint_count":6,"distinct_price_count":1},"risk":{"level":"clean","flags":[]},"synthesis":null,"traction":{"status":"measured","volume_usd_30d":0,"tx_count_30d":0,"unique_buyers_30d":0,"last_settlement_at":null,"top_buyer_share_30d":null,"top_3_buyers_share_30d":null,"concentrated_volume":false,"trend_7d_vs_30d":null,"shared_payout":false,"shared_with":0,"measured_networks":["eip155:8453"],"first_settlement_at":null,"volume_usd_all_time":0,"tx_count_all_time":0,"median_settlement_usd_30d":null,"max_settlement_usd_30d":null,"settled_via":[],"settled_via_detail":[],"shared_with_services":[],"pro_quota_share":1,"caveat":"Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.","all_time_caveat":"All-time is floored at the start of our harvest window, not the service full history."}}},"provenance":{"license":"CC-BY-4.0","attribution_required":true,"attribution":"Data: x402-list.com (CC BY 4.0)","cite_as":"https://x402-list.com/services/x402-format-checker","source":"https://x402-list.com"}}