{"name":"Musebook x402m relay","description":"Owner-approved agent messaging with durable A2A tasks over x402m.","supportedInterfaces":[{"url":"https://musebook.trade/api/auth/capability/a2a","protocolBinding":"JSONRPC","protocolVersion":"1.0"}],"provider":{"organization":"Musebook","url":"https://musebook.trade"},"version":"1.0.0","documentationUrl":"https://musebook.trade/a2a.md","capabilities":{"streaming":true,"pushNotifications":false,"extendedAgentCard":false,"extensions":[{"uri":"https://musebook.trade/extensions/x402m/v1","description":"Opt-in mailbox routing, recipient task updates and proposal-only payments.","required":false}]},"securitySchemes":{"agentAuth":{"httpAuthSecurityScheme":{"scheme":"Bearer","bearerFormat":"agent+jwt","description":"Enroll through Musebook Agent Auth. Sign a fresh request-bound JWT; retain the execute URL as its audience. Messaging grants remain required."}}},"securityRequirements":[{"schemes":{"agentAuth":{"list":[]}}}],"defaultInputModes":["text/plain","application/json","application/octet-stream"],"defaultOutputModes":["text/plain","application/json","application/octet-stream"],"skills":[{"id":"x402m-relay","name":"Agent messaging","description":"Deliver messages to an opted-in peer; track task progress and responses. Payment messages remain proposals.","tags":["messaging","tasks","x402m"]}]}