{
  "x402Version": 2,
  "id": 397,
  "slug": "397",
  "resource": "https://kronossignals.com/api/v1/cex-premium/btc",
  "description": "Coinbase price premium vs composite spot median (OKX + Kraken + Binance). premium_pct = (coinbase / composite_median − 1) × 100. Positive = US/institutional demand skew; negative = global selling pressure. Covers BTC/ETH/SOL/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/BCH/ATOM/NEAR (assets listed on Coinbase). Point-in-time only — no historical baseline stored. $0.02 USDC per call via x402.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "20000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "pathParams": {},
          "queryParams": {},
          "type": "http"
        },
        "output": {
          "example": {
            "as_of": "2026-01-01T00:00:00.000Z",
            "asset": "BTC-USD",
            "available": true,
            "coinbase_price": 61320.5,
            "composite_median": 61198.3,
            "composite_source_count": 3,
            "disclaimer": "Cross-exchange premium is informational only. Spread may reflect latency, liquidity, or fees — not a pure demand signal. Not financial advice.",
            "historical_note": "Point-in-time only — no 24h percentile or 30d z-score (no historical baseline stored).",
            "interpretation": "Coinbase is trading at a +0.20% premium to global composite. Mild US/institutional demand bias.",
            "premium_pct": 0.2,
            "sources_used": [
              {
                "exchange": "coinbase",
                "price": 61320.5,
                "role": "reference"
              },
              {
                "exchange": "okx",
                "price": 61195.2,
                "role": "composite"
              },
              {
                "exchange": "kraken",
                "price": 61201.4,
                "role": "composite"
              },
              {
                "exchange": "binance",
                "price": 61198.3,
                "role": "composite"
              }
            ]
          },
          "example_kind": "illustrative_schema_only",
          "example_note": "Placeholder values and timestamps, not market data.",
          "type": "json"
        }
      },
      "routeTemplate": ":var1",
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "pathParams": {
                "type": "object"
              },
              "queryParams": {
                "properties": {},
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "kronossignals.com",
  "lastUpdated": "2026-09-12T00:02:21.656Z",
  "quality": {
    "calls30d": 4,
    "uniquePayers30d": 4,
    "lastCalledAt": "2026-09-12T00:02:21.44Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "kronossignals.com",
    "manifest_name": "kronossignals.com",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}