NFT Alpha — OpenSea Market Signals (RAEN x402)

{
  "name": "NFT Alpha \u2014 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 \u2014 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://raen-facilitator.fly.dev/facilitator, payTo treasury 0x9B8a27e03CEbA490953cDa8AB1291c0E13bAf72f. 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 \u2192 decode the 402 PAYMENT-REQUIRED header \u2192 sign a USDC EIP-3009 transferWithAuthorization \u2192 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": []
}