PolyBridge MCP

Connect an MCP client to PolyBridge tools. Hosted MCP supports Search and Forecast. Local MCPB v0.3.1 also supports approved RVOL tools.

Before you start

Choose a connection path

Use Hosted MCP for clients that support remote MCP servers. Use local MCPB only when your client expects a local stdio server.

Invalid auth returns an error. Remove auth to use anonymous mode where supported. PolyBridge MCP is read-only. It does not trade or move funds.

MCPB supports Search, Forecast, and approved RVOL tools. RVOL tools require a PolyBridge API key with rvol:read.

Hosted MCP

Connect to the remote MCP server

Hosted MCP is the remote PolyBridge MCP server. Use it when your client supports remote MCP servers. You do not install a local server.

URLhttps://mcp.polybridge.ai/mcp

TransportStreamable HTTP

Authnone, API key, or supported OAuth

Toolspolybridge_search, polybridge_forecast

ScopesAuthenticated only: search:read, forecast:read

Hosted MCP works without a key at anonymous limits. Add an API key or supported OAuth for higher usage. Add the endpoint inside an MCP client.

Setup

Add https://mcp.polybridge.ai/mcp to your MCP client.
No API key is required at anonymous limits.
Add an API key if your client supports bearer headers and you want higher usage.
Use OAuth where your client supports Hosted MCP OAuth.

Local MCPB

Run MCP tools on your machine

Local MCPB is local. Use it when your MCP client runs tools on your machine. Search and Forecast can run without a key at anonymous limits. Approved RVOL tools require a PolyBridge API key with rvol:read.

Steps

Download the MCPB release.
No API key is required for Search and Forecast at anonymous limits.
Add POLYBRIDGE_API_KEY for higher Search and Forecast usage or approved RVOL tools.
Add or import the MCPB into your local MCP client.
Test polybridge_search or polybridge_forecast, then an approved RVOL tool if your key includes rvol:read.

API key

POLYBRIDGE_API_KEY=YOUR_API_KEY

Repocrowdvector/polybridge-mcp

Transportstdio

Package/scriptpolybridge-mcp-server

Authnone for Search and Forecast at anonymous limits; POLYBRIDGE_API_KEY for higher usage or approved RVOL

RVOL toolspolybridge_rvol_models, polybridge_rvol_assets, polybridge_rvol_latest, polybridge_rvol_history, polybridge_rvol_actuals, polybridge_rvol_features_latest

Assetpolybridge-mcp-v0.3.1.mcpb

Version0.3.1

Local MCPB works without a key at anonymous limits for Search and Forecast. Approved RVOL tools require POLYBRIDGE_API_KEY with rvol:read. Current repo is crowdvector/polybridge-mcp. Current release is polybridge-mcp-v0.3.1.

Download MCPB release Open Developer Console

Test prompts

Try Search, Forecast, and RVOL prompts

Search and Forecast can run anonymously at lower limits. RVOL tools require a PolyBridge API key with rvol:read.

Search prompt

Use polybridge_search to find markets related to whether the average US 30-year fixed mortgage rate will be below 6% at the end of 2026.

Forecast prompt

Use polybridge_forecast to forecast whether the average US 30-year fixed mortgage rate will be below 6% at the end of 2026.

RVOL prompt

Use polybridge_rvol_latest to get the latest 21d realized-volatility forecast for spx_index, then use polybridge_rvol_actuals to compare it with recent realized outcomes.