{"domain":"validate.crewofthecaptain.com","count":2,"changes":[{"captured_at":"2026-10-11T22:07:51.353946","card_hash":"71f4ef2bd8763b8e9b0ba16547389d43b0dc30cd9834209bf909efb0bd348aee","previous_card_hash":"4c196c79014c7f8c1285a5d15b6056ffda155395f544a67b1979ac72b78a0b04","diff":{"skills_added":[],"skills_removed":[],"skills_changed":[],"fields_changed":[{"field":"preferredTransport","before":null,"after":"JSONRPC"},{"field":"provider","before":{"organization":"Crew of the Captain","url":"https://crewofthecaptain.com/"},"after":{"organization":"Crew of the Captain","url":"https://crewofthecaptain.com"}}],"other_changed":false,"is_empty":false,"human_summary":"preferredTransport ∅ → JSONRPC · provider Crew of the Captain → Crew of the Captain"}},{"captured_at":"2026-10-11T20:31:07.041718","card_hash":"4c196c79014c7f8c1285a5d15b6056ffda155395f544a67b1979ac72b78a0b04","previous_card_hash":null,"diff":{"skills_added":[{"id":"email","name":"Validate email","description":"Email address syntax (dot-atom local part, LDH domain; no DNS). Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base.","tags":["validation","format","checksum","x402","email"],"inputModes":["application/json"],"outputModes":["application/json"]},{"id":"eu-vat","name":"Validate eu-vat","description":"EU VAT number: per-country format (offline, no VIES); PL also NIP checksum. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base.","tags":["validation","format","checksum","x402","eu-vat"],"inputModes":["application/json"],"outputModes":["application/json"]},{"id":"iban","name":"Validate iban","description":"IBAN: country length + ISO 13616 mod-97 checksum. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base.","tags":["validation","format","checksum","x402","iban"],"inputModes":["application/json"],"outputModes":["application/json"]},{"id":"pl-nip","name":"Validate pl-nip","description":"Polish NIP tax id: 10 digits + weighted mod-11 checksum. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base.","tags":["validation","format","checksum","x402","pl-nip"],"inputModes":["application/json"],"outputModes":["application/json"]},{"id":"pl-pesel","name":"Validate pl-pesel","description":"Polish PESEL: checksum + encoded birth date and sex. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base.","tags":["validation","format","checksum","x402","pl-pesel"],"inputModes":["application/json"],"outputModes":["application/json"]},{"id":"pl-regon","name":"Validate pl-regon","description":"Polish REGON: 9 or 14 digits + mod-11 checksum. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base.","tags":["validation","format","checksum","x402","pl-regon"],"inputModes":["application/json"],"outputModes":["application/json"]}],"skills_removed":[],"skills_changed":[],"fields_changed":[{"field":"name","before":null,"after":"x402 Format Checker"},{"field":"description","before":null,"after":"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. Send message/send with a data part {\"type\": \"<skill id>\", \"value\": \"...\"}; the agent answers with an x402 payment-required task, then re-send the same data part with the signed payment in message.metadata (stateless: nothing is stored)."},{"field":"version","before":null,"after":"1.3.0"},{"field":"protocolVersion","before":null,"after":"0.3.0"},{"field":"url","before":null,"after":"https://validate.crewofthecaptain.com/a2a"},{"field":"documentationUrl","before":null,"after":"https://validate.crewofthecaptain.com/llms.txt"},{"field":"capabilities","before":null,"after":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false,"extensions":[{"uri":"https://github.com/google-agentic-commerce/a2a-x402/blob/main/spec/v0.2","required":true,"description":"Supports payments using the x402 protocol for on-chain settlement. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base."}]}},{"field":"provider","before":null,"after":{"organization":"Crew of the Captain","url":"https://crewofthecaptain.com/"}}],"other_changed":true,"is_empty":false,"human_summary":"added 6 skills · name ∅ → x402 Format Checker · description ∅ → Format and checksum validation for IBAN, · version ∅ → 1.3.0 · protocolVersion ∅ → 0.3.0 · url ∅ → https://validate.crewofthecaptain.com/a2 · documentationUrl ∅ → https://validate.crewofthecaptain.com/ll · capabilities ∅ → extensions, pushNotifications, stateTran · provider ∅ → Crew of the Captain"}}]}