Parlay — Prediction Market MCP Server

A unified MCP server for prediction markets. Search and compare across Polymarket, Kalshi, Limitless, and Manifold from inside Claude, ChatGPT, Gemini, OpenClaw, and any MCP-compatible AI client.

Parlay aggregates real-money prediction markets and sentiment markets through one hosted endpoint, with mechanical separation between the two so that real-money analysis never gets contaminated with play-money signal.

Tools

Every tool response carries unified metadata: data freshness, venues queried, venues failed, market type (real_money / sentiment / mixed), match confidence (high / medium / low / not_applicable), liquidity status, risk flags, and a standard non-trade-recommendation disclaimer.

Typical queries Parlay handles well:

• "Search bitcoin prediction markets across all venues."
• "What's trending in AI markets today?"
• "Compare 2028 election odds across venues."
• "Brief me on Fed rate decision markets."
• "What's on Kalshi for Q4 inflation?"

Connect

MCP URL:   https://mcp.parlay.run/mcp
Auth:      OAuth
Transport: Streamable HTTP

Claude (Desktop, web, mobile, Cowork)

Parlay connects through Claude's Custom Connectors interface. The same flow works across all Claude surfaces.

1. Open Claude settings (click your profile icon → Settings).
2. In the sidebar, select Connectors.
3. Scroll to the bottom and click Add custom connector.
4. Enter URL: https://mcp.parlay.run/mcp
5. Click Add, then Connect to complete the OAuth authorization.

Parlay's tools will appear in your tool list on the next message.

Note: Custom connectors are available on Free, Pro, Max, Team, and Enterprise plans. Free Claude users are limited to one custom connector at a time. Do not configure Parlay through claude_desktop_config.json — that file is for local stdio MCP servers only; Parlay is a remote MCP server.

Cursor, Cline, OpenClaw, and other MCP clients

Add https://mcp.parlay.run/mcp to your client's MCP server configuration. The OAuth flow will trigger on first tool call. Refer to your client's MCP setup documentation for the exact configuration file location and remote-MCP support status.

Coverage

Primary real-money venues: Polymarket, Kalshi

Secondary PMXT-backed venues/sources: Limitless, Opinion.trade, Smarkets, Myriad, Metaculus, Probable, Baozi

Secondary sources may have incomplete pricing, volume, or liquidity data. Parlay flags these cases with metadata such as secondary_venue_data, volume_unconfirmed, and depth_unknown_on_one_platform, so downstream tools and AI agents can treat them with appropriate caution.

Sentiment venues: Manifold — isolated from real-money comparison and discrepancy tools.

                  Claude / ChatGPT / Gemini / OpenClaw
                              ↕  (MCP over HTTPS)
                    ┌────────────────────┐
                    │  mcp.parlay.run    │
                    │   (this server)    │
                    └────────┬───────────┘
                             │
                ┌────────────┴────────────┐
                ↓                         ↓
       Real-money data layer    Sentiment data layer
       Polymarket, Kalshi       Manifold
       + secondary venues       (isolated)

Pricing

Parlay offers a free plan for basic market search and briefs. Pro unlocks the full toolset, including discovery, cross-venue comparison, discrepancy scanning, and platform inspection. See parlay.run/pricing for current pricing.

Compliance posture

• Read-only. No order placement, no position management, no fund custody.
• No private credentials handled. Users never share venue API keys with Parlay.
• Sentiment isolation. Manifold is mechanically excluded from real-money tools (compare_markets, scan_discrepancies). The sentiment_market_excluded risk flag is emitted whenever it is filtered out.
• Settlement and liquidity risk flags. Markets with weak settlement criteria, missing volume data, or stale signals carry explicit risk flags in their metadata.
• Standard disclaimers. Every tool response carries a non-trade-recommendation disclaimer in its metadata block.

Built on

Parlay's real-money venue access is built on PMXT, an open-source unified SDK for prediction market venues. Parlay adds the AI intelligence layer on top: event comparability, settlement-risk metadata, sentiment isolation, and tool orchestration for MCP. PMXT trading methods are explicitly not exposed by Parlay — the hosted product is read-only by design.

Resources

• parlay.run — main site
• parlay.run/pricing — current pricing
• Privacy Policy
• Terms of Service
• Issues and questions: file an issue on this repository

License

Proprietary. See TERMS.md for full usage terms.

The contents of this repository are published for transparency and review. They are not licensed for redistribution, modification, or commercial use. Parlay is delivered as a hosted service; usage of the service is governed by the Terms of Service.