polymarket-news-mcp 0.1.0

MCP server that matches news headlines to the Polymarket prediction markets they could move — live odds, deep links, explainable matching

polymarket-news-mcp

Give an AI agent a headline — get the Polymarket markets it moves.

An MCP (Model Context Protocol) server that connects real-world news to prediction markets. Plenty of MCP servers can look up Polymarket prices; this one answers a different question: "this just happened — where can the world's belief about it be read?" Matching is deterministic and explainable — every match reports the exact terms that fired and a confidence score, so your agent can judge the match itself.

Read-only by design: no API keys, no wallet, no trading. Live odds and links only.

Tools

Tool	What it does
match_news(text, top_k)	The headline tool. News headline/snippet → the markets it could move, with live odds, 24h volume, match score, matched terms, deep links
latest_matched_news(top_k, max_age_hours)	Live feed: recent headlines from major outlets (crypto, politics, world, sports), each matched to its markets
search_markets(query, top_k)	Lenient free-text search over ~2,000 active markets
trending_markets(top_k)	Most active markets right now by 24h volume
get_market(slug_or_url)	One market's live odds by URL or slug

Example

match_news("Federal Reserve signals rate hike as inflation stays hot")

[
  {"question": "Fed rate hike in 2026?", "match_score": 17.2,
   "outcomes": {"Yes": 0.47, "No": 0.53}, "volume_24h_usd": 812440,
   "matched_terms": ["fed", "hike", "rate", "rate hike"],
   "url": "https://polymarket.com/event/fed-rate-hike-in-2026"},
  {"question": "Fed Rate Hike by July 2026 Meeting?", "match_score": 17.0,
   "outcomes": {"Yes": 0.08, "No": 0.92}, ...}
]

Install

Requires Python ≥3.10. With uv (no install needed):

uvx --from git+https://github.com/mobymedia/polymarket-news-mcp polymarket-news-mcp

Claude Code

claude mcp add polymarket-news -- uvx --from git+https://github.com/mobymedia/polymarket-news-mcp polymarket-news-mcp

Claude Desktop / any MCP client (claude_desktop_config.json):

{
  "mcpServers": {
    "polymarket-news": {
      "command": "uvx",
      "args": ["--from", "git+https://github.com/mobymedia/polymarket-news-mcp",
               "polymarket-news-mcp"]
    }
  }
}

Or classic pip: pip install git+https://github.com/mobymedia/polymarket-news-mcp then command polymarket-news-mcp.

How matching works

IDF-weighted term overlap between your text and market questions/event titles, plus: phrase (bigram) agreement, numeric normalization ($120,000 ≡ 120k), accent folding, a salience gate (every match needs a rare informative anchor — "openai", never "the"), one-best-market-per-event dedupe, and a relative cutoff. Market data comes from Polymarket's public Gamma API (top ~2,000 markets by liquidity, cached 15 minutes at ~/.cache/polymarket-news-mcp/). First call after a cold start takes ~10–15s to build the index; subsequent calls are instant.

Notes & limits

• Informational only — not financial advice. Polymarket availability depends on your jurisdiction; this server never places orders.
• News feed sources: CoinDesk, Cointelegraph, Decrypt, The Block, SEC, BBC World & Politics, ESPN (RSS). PRs welcome for more.
• Match scores ≥15 are high-confidence; 10–15 are related-entity matches.

License

MIT