Introduction
Parlay is a read-only MCP server that brings prediction market data from Polymarket, Kalshi, Limitless, and Manifold into Claude, ChatGPT, Gemini, OpenClaw, and other MCP-compatible clients.
Parlay brings live data from Polymarket, Kalshi, Limitless, and Manifold into Claude, ChatGPT, Gemini, OpenClaw, and any MCP-compatible client. Ask in natural language to search markets, compare odds across venues, scan cross-venue spreads, and generate research briefs — without leaving your chat.
Phase 1 covers four venues — Polymarket, Kalshi, Limitless, and Manifold. Opinion.trade is tracked internally until public liquidity meets the bar for primary coverage.
Read-only by design
Parlay does not place orders, manage positions, or provide investment advice. It returns structured market data and source links so your AI client can help with research.
Connect Your AI Assistant
Choose the client you already use. Chat apps work well for conversational research; CLI agents work well for terminal workflows.
Claude
MCP connector via Settings → Connectors. Works on Pro, Max, Team, and Enterprise plans.
ChatGPT
MCP via Developer Mode. Works on Plus and Pro plans where MCP connectors are available.
Gemini CLI
Terminal-first. Install with one command via `gemini extensions install`.
OpenClaw
Self-hosted agent runtime. Add Parlay via the `mcporter` skill or edit `openclaw.json`.
MCP Tools
Parlay exposes six read-only tools:
search_markets— Find markets by keyword across all four venues.discover_markets— Browse trending, high-volume, or fast-moving markets.compare_markets— Side-by-side comparison of the same event across venues.scan_discrepancies— Surface cross-venue price spreads (informational only).inspect_platform— Drill into a single venue: order book, liquidity, recent moves.market_brief— Generate a structured research brief on a topic.
See the tool reference for what each tool does and which plan includes it.
Try it
Once Parlay is connected, ask your AI client something like:
Your assistant will call compare_markets and return a side-by-side table with freshness timestamps and source links. No dashboards, no API keys.
Prediction Markets
Polymarket
Crypto-native, real-money. Deepest liquidity in politics, crypto, and current events.
Kalshi
US-regulated event contracts. Strong on economic indicators, Fed decisions, and elections.
Limitless
Real-money on Base. Useful as a directional signal on long-tail favorites.
Manifold
Community sentiment in play-money form. Useful as a forecasting baseline.
Go Deeper
Quickstart
Sign in, install Parlay in your AI client, and run your first query.
Tools
The current read-only MCP tool set.
How Parlay Works
How Parlay normalizes multiple venue APIs into one MCP interface.
Opinion.trade status
A limited-liquidity status page for a venue Parlay does not currently promote.