PolyBridge

io.github.crowdvector/polybridge-mcp

Connects Claude to PolyBridge's prediction market intelligence through two read-only tools: polybridge_search for querying market data with optional filters and dimensions, and polybridge_forecast for generating probability forecasts on specific questions. Runs either as a hosted Streamable HTTP endpoint or locally via MCPB with a PolyBridge API key. Useful when you need to pull real-time prediction market signals into your workflow, whether that's researching event probabilities, tracking forecasts across dimensions, or incorporating crowd-sourced intelligence into analysis. The hosted version keeps your API key server-side, while the local MCPB option stores credentials on your machine. Both paths expose the same search:read and forecast:read scopes over stdio or HTTP transport.

tools: 2
transport: HTTP
last updated: Jun 19, 2026

Open website

Install

From registry metadata

$ npx add-mcp https://mcp.polybridge.ai/mcp --name polybridge-mcp

Run in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.

Review the command, arguments and environment values before installing. MCP servers run with your local permissions.

Other ways

Claude Code

$ claude mcp add --transport http polybridge-mcp https://mcp.polybridge.ai/mcp

Run in your terminal. Add --scope user to make it available in every project.

Tools

Verified live · 2 tools

Verified live against the running server on Nov 6, 2026.

polybridge_searchSearch public prediction markets for markets relevant to a natural-language topic or question. Use when you need candidate markets, market URLs, outcomes, statuses, and relevance scores. Do not use for a final probability forecast, market-history lookup, trading, or private/in...4 params

Search public prediction markets for markets relevant to a natural-language topic or question. Use when you need candidate markets, market URLs, outcomes, statuses, and relevance scores. Do not use for a final probability forecast, market-history lookup, trading, or private/in...

Parameters* required

dimensionsarray

Search dimensions to run. Uses all supported dimensions by default.

filtersvalue

Optional market filters. Currently only filters.status is supported, with active, closed, or resolved.

query*string

Natural-language topic or question to match to public markets.

top_k_per_dimensioninteger

Maximum number of candidate markets to return per search dimension.default: 5

polybridge_forecastGenerate a read-only probability forecast for a clearly stated future event by searching relevant prediction markets and synthesizing evidence. Use when the user asks for a probability, outlook, or forecast; use polybridge_search when they only need market discovery. Does not...2 params

Generate a read-only probability forecast for a clearly stated future event by searching relevant prediction markets and synthesizing evidence. Use when the user asks for a probability, outlook, or forecast; use polybridge_search when they only need market discovery. Does not...

Parameters* required

include_graphboolean

Whether to include the causal graph in the structured response.default: true

question*string

Clearly stated future-event forecasting question, 500 characters or fewer.

Details

Website: polybridge.ai/api/mcp
Transport: HTTP
Registry: MCP registry, active
Tools verified: Nov 6, 2026