MCP server exposing Polymarket + Kalshi + Manifold to Claude/LLMs, with 3-venue arb discovery.
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# prediction-market-mcp > Give Claude (or any MCP-compatible LLM) a live view into **Polymarket + Kalshi + Manifold**, plus a single tool that hunts for **3-venue** arb. > > **Just want to look at Polymarket data without installing an MCP server?** Try the live dashboard: https://creampig666.github.io/prediction-markets-live/ An [MCP](https://modelcontextprotocol.io/) server in ~400 lines of Python. No keys, no auth, no signup. Stdio transport, Claude Desktop ready. ``` You: "Find me anything interesting on bitcoin right now." Claude (calls find_arb_opportunities("bitcoin")): "Polymarket has 'BTC > $150k by Jun 30' at 12%. Kalshi's matched contract is at 19%. Manifold's 'Bitcoin to $150k in 2026?' is at 22%. 12 percentage points between Polymarket and Manifold — worth a look at whether they're really the same underlying..." ``` ## What it exposes 11 tools across 3 venues: | Tool | What it does | |---|---| | `polymarket_top_markets(limit)` | Top Polymarket markets by 24h volume | | `polymarket_get_market(slug)` | Single market detail by slug | | `polymarket_search(query, limit)` | Keyword search across active markets | | `kalshi_top_events(limit)` | Active Kalshi events | | `kalshi_get_market(ticker)` | Single Kalshi market by ticker | | `kalshi_markets_for_event(event_ticker)` | All sub-markets under a Kalshi event | | `kalshi_search_events(query)` | Keyword search across open Kalshi events | | `manifold_top_markets(limit)` | Recent BINARY Manifold markets | | `manifold_get_market(slug)` | Single Manifold market by slug | | `manifold_search(query, limit)` | Keyword search across Manifold | | **`find_arb_opportunities(query, min_divergence_pp)`** | **3-venue search + cross-pair divergence report. Returns matched pairs (any 2 of 3 venues) ranked by abs implied-prob gap.** | All tools return structured JSON ready for the LLM to summarize. ## Install ```bash pip install git+https://github.com/creampig666/pre…
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