{"protocolVersion":"0.3.0","name":"VouchSpec Agent Skill Evidence","description":"Agent-only discovery for fresh, exact-commit Agent Skill validation. Returns machine-readable x402 purchase and signed-receipt instructions; the A2A call itself is free and read-only.","url":"https://vouchspec.plyrium.com/api/vouchspec/v1/a2a","preferredTransport":"JSONRPC","additionalInterfaces":[{"url":"https://vouchspec.plyrium.com/api/vouchspec/v1/a2a","transport":"JSONRPC"}],"supportedInterfaces":[{"url":"https://vouchspec.plyrium.com/api/vouchspec/v1/a2a","protocolBinding":"JSONRPC","protocolVersion":"0.3"}],"provider":{"organization":"Plyrium","url":"https://vouchspec.plyrium.com"},"version":"0.1.0","documentationUrl":"https://vouchspec.plyrium.com/vouchspec","capabilities":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false},"security":[],"defaultInputModes":["text/plain","application/json"],"defaultOutputModes":["text/plain","application/json"],"skills":[{"id":"discover_vouchspec_validation","name":"Discover exact-commit Agent Skill validation","description":"Returns current request schema, x402 USDC payment instructions, delivery expectations, signed receipt verification, cache, sharing, and invalidation rules. It does not perform paid validation.","tags":["agent-skills","exact-commit","evidence","x402","usdc","base"],"examples":["How can my agent buy fresh evidence for an exact public Agent Skill commit?","Return VouchSpec x402 request and receipt verification instructions."],"inputModes":["text/plain","application/json"],"outputModes":["text/plain","application/json"]}],"supportsAuthenticatedExtendedCard":false}