{
  "x402Version": 2,
  "id": 6519,
  "slug": "6519",
  "resource": "https://api.octodamus.com/v2/arcus/perp",
  "description": "Live perp market facts from Arcus (dYdX Labs on Robinhood Chain) for tokenized-stock, index, and crypto perps: hourly funding (+ annualized), open interest (base + USD), mark vs oracle price, 24h volume, and margin fractions including the off-hours initial margin (Arcus raises margin when the NYSE is closed). Perp-venue complement to stock-perp-facts.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x5c6B3a3dAe296d3cef50fef96afC73410959a6Db",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "20000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "category": "trading",
      "discoverable": true,
      "info": {
        "input": {
          "headers": {
            "PAYMENT-SIGNATURE": "x402 EIP-3009 USDC payment (Base mainnet)"
          },
          "method": "GET",
          "type": "http"
        },
        "output": {
          "example": {
            "funding": {
              "rate_annualized_pct": 4.2,
              "rate_hourly": 0.00000479
            },
            "margin": {
              "max_leverage": 13.3,
              "offhours_initial_fraction": 0.075
            },
            "mark_price": 205.63,
            "mark_vs_oracle_pct": 0.01,
            "market": "NVDA-USD",
            "open_interest_usd": 53700,
            "oracle_price": 205.61,
            "ticker": "NVDA"
          },
          "type": "json"
        }
      },
      "name": "Octodamus Arcus Perp Facts",
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "properties": {
              "headers": {
                "properties": {
                  "PAYMENT-SIGNATURE": {
                    "description": "x402 EIP-3009 USDC payment signature (Base mainnet)",
                    "type": "string"
                  }
                },
                "required": [
                  "PAYMENT-SIGNATURE"
                ],
                "type": "object"
              },
              "method": {
                "const": "GET",
                "type": "string"
              }
            },
            "required": [
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "action": {
                "enum": [
                  "BUY",
                  "SELL",
                  "HOLD"
                ],
                "type": "string"
              },
              "btc_trend": {
                "enum": [
                  "UP",
                  "DOWN",
                  "SIDEWAYS"
                ],
                "type": "string"
              },
              "confidence": {
                "maximum": 1,
                "minimum": 0,
                "type": "number"
              },
              "fear_greed": {
                "maximum": 100,
                "minimum": 0,
                "type": "number"
              },
              "polymarket_edge": {
                "type": "object"
              },
              "reasoning": {
                "type": "string"
              },
              "signal": {
                "enum": [
                  "BULLISH",
                  "BEARISH",
                  "NEUTRAL"
                ],
                "type": "string"
              }
            },
            "type": "object"
          }
        },
        "type": "object"
      },
      "tags": [
        "arcus",
        "dydx",
        "perps",
        "tokenized equity",
        "robinhood chain",
        "funding rate",
        "open interest",
        "NVDA",
        "TSLA",
        "off-hours margin",
        "Base USDC"
      ]
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "api.octodamus.com",
  "lastUpdated": "2026-08-23T01:28:00.298Z",
  "quality": {
    "calls30d": 1,
    "uniquePayers30d": 1,
    "lastCalledAt": "2026-08-23T01:27:59.916Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "api.octodamus.com",
    "manifest_name": "api.octodamus.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"
  }
}