{"domain":"nft-alpha-x402.fly.dev","count":5,"changes":[{"captured_at":"2026-10-16T14:38:34.620972","card_hash":"2d7174973715cd827ea8122fc022c7c0e21588f9d36cb391c3d346e8a86c87d6","previous_card_hash":"1c6e45a4993335c42b3567ec00d24128a7e92bfc092242a18c2c5d068a1bb91f","diff":{"skills_added":[],"skills_removed":[],"skills_changed":[],"fields_changed":[{"field":"capabilities","before":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false,"extensions":[{"uri":"https://x402.org","description":"x402 v2 payment gating: USDC on eip155:8453, scheme exact, $0.02 per call, facilitator https://raen-facilitator.fly.dev/facilitator, payTo treasury 0x9B8a27e03CEbA490953cDa8AB1291c0E13bAf72f. The live 402 challenge is authoritative.","required":false}]},"after":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false,"extensions":[{"uri":"https://x402.org","description":"x402 v2 payment gating: USDC on eip155:8453, scheme exact, $0.02 per call, facilitator https://x402-agent-pay.com/facilitator, payTo treasury 0x7861db4efc14a1ed5dd8c96c528a3796560f1393. The live 402 challenge is authoritative.","required":false}]}}],"other_changed":false,"is_empty":false,"human_summary":"capabilities extensions, pushNotifications, stateTran → extensions, pushNotifications, stateTran"}},{"captured_at":"2026-10-12T03:54:42.864150","card_hash":"1c6e45a4993335c42b3567ec00d24128a7e92bfc092242a18c2c5d068a1bb91f","previous_card_hash":"2d7174973715cd827ea8122fc022c7c0e21588f9d36cb391c3d346e8a86c87d6","diff":{"skills_added":[],"skills_removed":[],"skills_changed":[],"fields_changed":[{"field":"capabilities","before":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false,"extensions":[{"uri":"https://x402.org","description":"x402 v2 payment gating: USDC on eip155:8453, scheme exact, $0.02 per call, facilitator https://x402-agent-pay.com/facilitator, payTo treasury 0x7861db4efc14a1ed5dd8c96c528a3796560f1393. The live 402 challenge is authoritative.","required":false}]},"after":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false,"extensions":[{"uri":"https://x402.org","description":"x402 v2 payment gating: USDC on eip155:8453, scheme exact, $0.02 per call, facilitator https://raen-facilitator.fly.dev/facilitator, payTo treasury 0x9B8a27e03CEbA490953cDa8AB1291c0E13bAf72f. The live 402 challenge is authoritative.","required":false}]}}],"other_changed":false,"is_empty":false,"human_summary":"capabilities extensions, pushNotifications, stateTran → extensions, pushNotifications, stateTran"}},{"captured_at":"2026-10-05T15:55:48","card_hash":"2d7174973715cd827ea8122fc022c7c0e21588f9d36cb391c3d346e8a86c87d6","previous_card_hash":"76bd94d38e685debe06ce56f9223e8960ba7a8cd623bcad87a7cc482e193c378","diff":{"skills_added":[],"skills_removed":[],"skills_changed":[],"fields_changed":[{"field":"capabilities","before":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false,"extensions":[{"uri":"https://x402.org","description":"x402 v2 payment gating: USDC on eip155:8453, scheme exact, $0.02 per call, facilitator https://x402-agent-pay.com/facilitator, payTo treasury 0x9e6A95B5Bf1190B5aCD00508a8E9c72eDEd5fB60. The live 402 challenge is authoritative.","required":false}]},"after":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false,"extensions":[{"uri":"https://x402.org","description":"x402 v2 payment gating: USDC on eip155:8453, scheme exact, $0.02 per call, facilitator https://x402-agent-pay.com/facilitator, payTo treasury 0x7861db4efc14a1ed5dd8c96c528a3796560f1393. The live 402 challenge is authoritative.","required":false}]}}],"other_changed":false,"is_empty":false,"human_summary":"capabilities extensions, pushNotifications, stateTran → extensions, pushNotifications, stateTran"}},{"captured_at":"2026-10-05T07:43:14","card_hash":"76bd94d38e685debe06ce56f9223e8960ba7a8cd623bcad87a7cc482e193c378","previous_card_hash":"2d7174973715cd827ea8122fc022c7c0e21588f9d36cb391c3d346e8a86c87d6","diff":{"skills_added":[],"skills_removed":[],"skills_changed":[],"fields_changed":[{"field":"capabilities","before":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false,"extensions":[{"uri":"https://x402.org","description":"x402 v2 payment gating: USDC on eip155:8453, scheme exact, $0.02 per call, facilitator https://x402-agent-pay.com/facilitator, payTo treasury 0x7861db4efc14a1ed5dd8c96c528a3796560f1393. The live 402 challenge is authoritative.","required":false}]},"after":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false,"extensions":[{"uri":"https://x402.org","description":"x402 v2 payment gating: USDC on eip155:8453, scheme exact, $0.02 per call, facilitator https://x402-agent-pay.com/facilitator, payTo treasury 0x9e6A95B5Bf1190B5aCD00508a8E9c72eDEd5fB60. The live 402 challenge is authoritative.","required":false}]}}],"other_changed":false,"is_empty":false,"human_summary":"capabilities extensions, pushNotifications, stateTran → extensions, pushNotifications, stateTran"}},{"captured_at":"2026-10-02T07:58:18","card_hash":"2d7174973715cd827ea8122fc022c7c0e21588f9d36cb391c3d346e8a86c87d6","previous_card_hash":null,"diff":{"skills_added":[{"id":"free-sample-preview","name":"Free sample + contract preview","description":"Points to the free validation surfaces before any payment: GET /sample returns the output shape, GET /openapi.json carries the full contract, GET /pricing.md and GET /llms.txt describe the endpoint and price.","tags":["sample","openapi","free","pricing","preview"],"inputModes":null,"outputModes":null},{"id":"machine-readable-surfaces","name":"Machine-readable discovery surfaces","description":"Guides agents to this wall's free machine surfaces: /pricing.md, /llms.txt, /openapi.json, /docs, /about, /.well-known/x402.json (live 402 accepts), /.well-known/agent-card.json (this card), POST /a2a (A2A v1 JSON-RPC).","tags":["discovery","openapi","x402","a2a","json"],"inputModes":null,"outputModes":null},{"id":"nft-signal-guide","name":"Paid OpenSea market-signal analysis per collection","description":"Explains how to buy POST /api/nft-signal ($0.02 USDC on eip155:8453): body { collection: slug } or { collections: [slugs] } (<=10) or omit for all watched collections. Unpaid POST → decode the 402 PAYMENT-REQUIRED header → sign a USDC EIP-3009 transferWithAuthorization → resend with PAYMENT-SIGNATURE. Returns 5-minute rolling listings/sales/bids/offers, sell-through, floor pressure and signal classifications (HIGH_DEMAND, UNDERPRICED_LISTING, BID_FRENZY, DUMP_WARNING, LOW_DEMAND). If the live stream has no recent events the paid response is an explicit empty result, never stale signals. Not financial advice.","tags":["nft","opensea","market-signals","floor-pressure","x402","usdc"],"inputModes":null,"outputModes":null}],"skills_removed":[],"skills_changed":[],"fields_changed":[{"field":"name","before":null,"after":"NFT Alpha — OpenSea Market Signals (RAEN x402)"},{"field":"description","before":null,"after":"Real-time OpenSea market-signal metrics for watched NFT collection slugs for $0.02 USDC on eip155:8453: send { collection } or { collections[] } (<=10, or omit for all watched) to POST /api/nft-signal and receive 5-minute rolling listings, sales, bids, offers, sell-through, floor pressure and signal classifications (HIGH_DEMAND, UNDERPRICED_LISTING, BID_FRENZY, DUMP_WARNING, LOW_DEMAND). Pay per call via x402 — no API keys, no subscription. Results are recent buffered Stream data, not a floor-price oracle or profit forecast. Not financial advice. Free surfaces: GET /sample (output shape), GET /openapi.json, GET /pricing.md, GET /llms.txt, GET /docs, GET /about, GET /health, GET /.well-known/x402.json."},{"field":"version","before":null,"after":"1.0.0"},{"field":"protocolVersion","before":null,"after":"1.0"},{"field":"url","before":null,"after":"https://nft-alpha-x402.fly.dev/a2a"},{"field":"documentationUrl","before":null,"after":"https://nft-alpha-x402.fly.dev/pricing.md"},{"field":"preferredTransport","before":null,"after":"JSONRPC"},{"field":"supportedInterfaces","before":null,"after":[{"url":"https://nft-alpha-x402.fly.dev/a2a","transport":"JSONRPC","protocolBinding":"JSONRPC","protocolVersion":"1.0"}]},{"field":"securitySchemes","before":null,"after":{}},{"field":"security","before":null,"after":[]},{"field":"capabilities","before":null,"after":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false,"extensions":[{"uri":"https://x402.org","description":"x402 v2 payment gating: USDC on eip155:8453, scheme exact, $0.02 per call, facilitator https://x402-agent-pay.com/facilitator, payTo treasury 0x7861db4efc14a1ed5dd8c96c528a3796560f1393. The live 402 challenge is authoritative.","required":false}]}},{"field":"provider","before":null,"after":{"organization":"Royal Agentic Enterprises","url":"https://nft-alpha-x402.fly.dev"}}],"other_changed":true,"is_empty":false,"human_summary":"added 3 skills · name ∅ → NFT Alpha — OpenSea Market Signals (RAEN · description ∅ → Real-time OpenSea market-signal metrics  · version ∅ → 1.0.0 · protocolVersion ∅ → 1.0 · url ∅ → https://nft-alpha-x402.fly.dev/a2a · documentationUrl ∅ → https://nft-alpha-x402.fly.dev/pricing.m · preferredTransport ∅ → JSONRPC · supportedInterfaces ∅ → https://nft-alpha-x402.fly.dev/a2a (JSON · securitySchemes ∅ →  · security ∅ → [] · capabilities ∅ → extensions, pushNotifications, stateTran · provider ∅ → Royal Agentic Enterprises"}}]}