Polymarket & Kalshi MCP server
Polymarket & Kalshi MCP Server
DepthFeed runs a remote Model Context Protocol (MCP) server, so Claude, Cursor, Codex, and ChatGPT can pull prediction-market order-book depth and price data mid-session — no SDK, no glue code. It is keyless to start: add the endpoint and your agent can query BTC Polymarket markets immediately, then drop in a key for everything else.
The DepthFeed MCP server is a remote Streamable-HTTP endpoint (https://api.depthfeed.com/mcp) that exposes Polymarket, Kalshi, and Limitless order-book data as Model Context Protocol tools. AI agents call tools like polymarket_search_markets and kalshi_get_orderbook to fetch live and historical depth as JSON, with the same plan gating as the REST API.
Polymarket & Kalshi MCP server at a glance
- Endpoint
- https://api.depthfeed.com/mcp
- Transport
- Remote MCP — Streamable HTTP
- Auth
- Keyless demo, or Bearer df_ key
- Tools
- 11 read-only — search · order book · history · screener
- Assets
- 7 — BTC · ETH · SOL · XRP · DOGE · BNB · HYPE
- Timestamps
- Millisecond observation time; venue-specific source stamps
- Underlying price
- Nearest preceding Binance reference when available
- History
- 7/30/90-day windows + full archive (Desk)
- Delivery
- REST history + normalized live WebSocket frames
- Resolution
- Raw stored observations or ?interval= 1s–1d
Polymarket & Kalshi MCP server
What the MCP server gives your agent
Keyless to start, your key for everything
Add the endpoint with no key and your agent is on the demo tier — BTC Polymarket markets, top-of-book — so a one-click install works the moment it lands. Add a DepthFeed API key (Authorization: Bearer df_…) and the same session unlocks all 7 assets, Kalshi, Limitless, the full ladder, and deep history. Paid-only calls return a clear in-tool message, not an error, so the agent knows exactly what to upgrade.
Eleven read-only tools across three venues
Discovery and depth in one toolset: polymarket_search_markets / kalshi_search_markets / limitless_search_markets to find a market, then *_get_orderbook for the latest book and *_get_snapshots for history, plus screener for a cross-venue top-of-book view and whoami to read the session's plan. Every tool is read-only and exposes the same underlying DepthFeed records through tool-specific response envelopes.
Add it to Claude, Cursor, Codex, or ChatGPT
In Claude Code: `claude mcp add --transport http depthfeed https://api.depthfeed.com/mcp`. In Cursor, VS Code, Claude Desktop, ChatGPT (Developer Mode), and OpenAI Codex, add the same URL as a custom/remote MCP server. Because it is a standard remote MCP endpoint, any MCP-capable client works — copy-paste snippets and one-click buttons are in the docs.
Inspect the data before integrating
Start with a bounded sample, verify the fields and timestamps, then choose the API or research workflow that matches the job.