DepthFeed
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Order-book depth & history for Polymarket, Kalshi. Keyless demo, key for full access.
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- Finance
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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
11 read-only — search · order book · history · screener
7 — BTC · ETH · SOL · XRP · DOGE · BNB · HYPE
Millisecond observation time; venue-specific source stamps
Nearest preceding Binance reference when available
7/30/90-day windows + full archive (Desk)
REST history + normalized live WebSocket frames
Raw stored observations or?interval= 1s–1d
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 depthfeedhttps://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.
Start with a bounded sample, verify the fields and timestamps, then choose the API or research workflow that matches the job.
- Set up the prediction-market MCP server →
- Backtest a prediction-market trading bot →
- Polymarket & Kalshi historical data →
- Polymarket & Kalshi order book data →
- Polymarket & Kalshi price data →
- Polymarket & Kalshi market data →
- Polymarket & Kalshi data API →
- Best prediction-market data: buyer's guide →
- Guides & resources →
It's a remote Model Context Protocol endpoint (https://api.depthfeed.com/mcp) that lets AI agents — Claude, Cursor, Codex, ChatGPT — pull prediction-market order-book depth and price data as tools, without writing API code. The agent calls tools like kalshi_get_orderbook; DepthFeed returns the same JSON the REST API serves.
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