track derived

{
  "input": {
    "type": "http",
    "method": "GET",
    "queryParams": {}
  },
  "output": {
    "type": "json",
    "errors": {
      "400": {
        "example": {
          "error": "invalid request"
        },
        "description": "Invalid or missing parameter(s). Returned before the payment gate on paid requests, so a malformed call is never charged. JSON body: { error: <what is wrong and how to fix it> } plus usage hints."
      },
      "402": {
        "description": "Payment required — x402 v2 challenge; the accepts array lists scheme, network, and amount. Retry the same request with a PAYMENT-SIGNATURE (v2) or X-PAYMENT (v1) header. Verification is free."
      },
      "500": {
        "example": {
          "error": "upstream_failed"
        },
        "description": "Unexpected server error. If a payment settled without a usable result, contact info@theaslangroupllc.com with the settlement tx hash for a re-run or credit."
      }
    },
    "example": {
      "shape": "Right-handed",
      "track": "ascot",
      "country": "UK",
      "surface": "Flat turf",
      "draw_bias": "High draws favoured in sprint races, especially in 5f-6f",
      "going_trend": "Drying",
      "current_going": "Good to Firm",
      "track_summary": "",
      "trainer_stats": [],
      "moisture_index": 18.5,
      "characteristics": [
        "Stiff uphill finish",
        "Wide track",
        "Suits strong stayers in Flat season"
      ],
      "notable_features": [
        "Royal Enclosure",
        "Straight 5f course"
      ],
      "distance_suitability": {
        "middle": "Fair test, pace bias",
        "sprints": "Draw bias is critical — high stalls preferred",
        "staying": "Stiff finish tests stamina"
      },
      "optimal_running_style": "Hold-up or stalking in sprints; front-running on round course"
    }
  }
}