compare_topic

Active

declared in 0.1.0

Cross-venue prediction-market LANDSCAPE scanner: for one topic, show how 5 venues (Polymarket, Kalshi, Manifold, PredictIt, Futuur) are pricing it side by side and flag divergence. Each venue is queried in parallel; a venue that errors or times out is reported as { reachable: false } and never fails the call. Returns each venue's top matches normalized to { venue, title, implied_probability (0-1 for the main/YES outcome, or null), url, n_outcomes }, plus a divergence summary across venues' top matches. HONESTY: this surfaces WHERE TO LOOK for mispricing — it is NOT an executable-arb tool. A high spread_pp usually reflects different bet shapes, resolution criteria, dates, or thin liquidity, not a real arbitrage. Divergence is only computed when ≥2 venues' top titles share strong token overlap (Jaccard); otherwise divergence is null with a low-match-quality note telling you to compare manually. Verify the questions resolve identically before trading. For executable poly↔kalshi arbitrage (needs order-book depth) use the `polymarket_arbitrage` pack.

Parameters schema

{
  "type": "object",
  "required": [
    "topic"
  ],
  "properties": {
    "topic": {
      "type": "string",
      "description": "Topic / question to scan across venues, e.g. \"bitcoin 100k\", \"fed rate cut\", \"2028 president\", \"government shutdown\", \"trump\"."
    },
    "per_venue": {
      "type": "number",
      "description": "Top matches to show per venue (default 3, max 5)."
    }
  }
}

What this tool wraps· 0 endpoints

min confidence0.70 0.50

No endpoints wrapped at confidence ≥ 0.50.

Parent server

Market Spread

https://github.com/pipeworx-io/mcp-market-spread

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