GET /v1/movers/sports-mlb

$0.02realtimetier: datacache 60sEngine A — Probability API

The fastest way to see where news is landing in MLB baseball: active markets ranked by absolute probability change over your chosen window, with volume surge ratios. Same shape as /v1/movers, pre-filtered to MLB baseball markets.

Parameters

Example

curl "https://x402-factory.com/v1/movers/sports-mlb?window=24h&limit=10"

Example response

{
  "data": {
    "movers": [
      {
        "slug": "dodgers-win-world-series-2026",
        "question": "Will the Dodgers win the 2026 World Series?",
        "p_now": 0.2382,
        "p_prev": 0.2302,
        "delta": 0.008,
        "volume_surge_ratio": 1.01,
        "category": "sports"
      },
      {
        "slug": "yankees-win-world-series-2026-11",
        "question": "Will the New York Yankees win the 2026 World Series?",
        "p_now": 0.1169,
        "p_prev": 0.1114,
        "delta": 0.0055,
        "volume_surge_ratio": 0.99,
        "category": "sports"
      }
    ]
  },
  "meta": {
    "endpoint": "/v1/movers/sports-mlb",
    "version": "1.0.0",
    "generated_at": "2026-08-18T22:54:16.960Z",
    "freshness": "realtime",
    "sources": [
      "kalshi",
      "polymarket"
    ],
    "request_id": "req_00000000",
    "docs": "https://x402-factory.com/docs/probability.movers.sports-mlb",
    "data_mode": "live"
  }
}

Response schema (data payload)

{
  "type": "object",
  "properties": {
    "movers": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "slug": {
            "type": "string"
          },
          "question": {
            "type": "string"
          },
          "p_now": {
            "type": "number",
            "minimum": 0,
            "maximum": 1
          },
          "p_prev": {
            "type": "number",
            "minimum": 0,
            "maximum": 1
          },
          "delta": {
            "type": "number"
          },
          "volume_surge_ratio": {
            "type": "number"
          },
          "category": {
            "type": "string"
          }
        },
        "required": [
          "slug",
          "question",
          "p_now",
          "p_prev",
          "delta",
          "volume_surge_ratio",
          "category"
        ],
        "additionalProperties": false
      }
    }
  },
  "required": [
    "movers"
  ],
  "additionalProperties": false
}

The platform wraps every payload in an envelope: { "data": …, "meta": { endpoint, version, generated_at, freshness, sources, request_id, docs, data_mode } }.

Payment (x402)

Unpaid requests receive 402 with payment requirements (accepts). Pay $0.02 in USDC on Base per call via an X-PAYMENT header — see docs.x402.org. With PAYMENT_MODE=disabled (local dev) the endpoint is open.

Errors