{"name":"NFT Alpha — OpenSea Market Signals (RAEN x402)","description":"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.","version":"1.0.0","protocolVersion":"1.0","url":"https://nft-alpha-x402.fly.dev/a2a","supportedInterfaces":[{"url":"https://nft-alpha-x402.fly.dev/a2a","transport":"JSONRPC","protocolBinding":"JSONRPC","protocolVersion":"1.0"}],"preferredTransport":"JSONRPC","provider":{"organization":"Royal Agentic Enterprises","url":"https://nft-alpha-x402.fly.dev"},"documentationUrl":"https://nft-alpha-x402.fly.dev/pricing.md","capabilities":{"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}]},"defaultInputModes":["application/json","text/plain"],"defaultOutputModes":["application/json","text/plain"],"skills":[{"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"],"examples":["How do I pay to get live market signals for Pudgy Penguins?","Which watched collections are showing bid frenzy right now?"]},{"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"],"examples":["Can I see the nft-signal output shape before paying?"]},{"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"],"examples":["Where is the machine-readable pricing manifest for this service?"]}],"securitySchemes":{},"security":[]}