PolyBridge
Calibrated probabilistic foresight for AI agents, powered by live prediction-market signal.
Should I use this
Quality & Safety
A
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
~1,551Tokens (tool definitions)
~8.9 KBTypical response size
Moderate attention impact (1.21% of 128k context)
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"polybridge-mcp": {
"url": "https://mcp.polybridge.ai/mcp"
}
}
}Remote endpoints
https://mcp.polybridge.ai/mcpstreamable-httpWhat it can do
Tool inventory
Tools (2)
🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
🟢polybridge_search(query, dimensions, top_k_per_dimension, filters)
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/internal data. Scores are relevance scores, not probabilities.
Input Schema
{
"type": "object",
"properties": {
"query": {
"description": "Natural-language topic or question to match to public markets.",
"title": "Query",
"type": "string"
},
"dimensions": {
"default": [
"direct",
"upstream",
"downstream",
"correlated"
],
"description": "Search dimensions to run. Uses all supported dimensions by default.",
"items": {
"enum": [
"direct",
"upstream",
"downstream",
"correlated"
],
"type": "string"
},
"maxItems": 4,
"minItems": 1,
"title": "Dimensions",
"type": "array"
},
"top_k_per_dimension": {
"default": 5,
"description": "Maximum number of candidate markets to return per search dimension.",
"maximum": 100,
"minimum": 1,
"title": "Top K Per Dimension",
"type": "integer"
},
"filters": {
"anyOf": [
{
"$ref": "#/$defs/SearchToolFilters"
},
{
"type": "null"
}
],
"default": null,
"description": "Optional market filters. Currently only filters.status is supported, with active, closed, or resolved."
}
},
"required": [
"query"
],
"$defs": {
"SearchToolFilters": {
"additionalProperties": false,
"properties": {
"status": {
"anyOf": [
{
"enum": [
"active",
"closed",
"resolved"
],
"type": "string"
},
{
"type": "null"
}
],
"default": null,
"title": "Status"
}
},
"title": "SearchToolFilters",
"type": "object"
}
},
"title": "polybridge_searchArguments"
}Output Schema
{
"type": "object",
"properties": {
"request_id": {
"title": "Request Id",
"type": "string"
},
"query": {
"title": "Query",
"type": "string"
},
"total_markets": {
"title": "Total Markets",
"type": "integer"
},
"dimensions_returned": {
"items": {
"type": "string"
},
"title": "Dimensions Returned",
"type": "array"
},
"results": {
"items": {
"$ref": "#/$defs/CompactSearchResult"
},
"title": "Results",
"type": "array"
},
"warnings": {
"items": {
"type": "string"
},
"title": "Warnings",
"type": "array"
}
},
"required": [
"request_id",
"query",
"total_markets",
"dimensions_returned",
"results"
],
"$defs": {
"CompactSearchResult": {
"properties": {
"dimension": {
"title": "Dimension",
"type": "string"
},
"rank": {
"title": "Rank",
"type": "integer"
},
"market_id": {
"title": "Market Id",
"type": "string"
},
"platform": {
"title": "Platform",
"type": "string"
},
"question": {
"title": "Question",
"type": "string"
},
"outcomes": {
"items": {
"type": "string"
},
"title": "Outcomes",
"type": "array"
},
"status": {
"enum": [
"active",
"closed",
"resolved"
],
"title": "Status",
"type": "string"
},
"platform_url": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"default": null,
"title": "Platform Url"
},
"score": {
"title": "Score",
"type": "number"
},
"warnings": {
"items": {
"type": "string"
},
"title": "Warnings",
"type": "array"
}
},
"required": [
"dimension",
"rank",
"market_id",
"platform",
"question",
"outcomes",
"status",
"score"
],
"title": "CompactSearchResult",
"type": "object"
}
},
"title": "CompactSearchResponse"
}🟢polybridge_forecast(question, include_graph)
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 place trades, provide financial advice, or access private/internal data.
Input Schema
{
"type": "object",
"properties": {
"question": {
"description": "Clearly stated future-event forecasting question, 500 characters or fewer.",
"title": "Question",
"type": "string"
},
"include_graph": {
"default": true,
"description": "Whether to include the causal graph in the structured response.",
"title": "Include Graph",
"type": "boolean"
}
},
"required": [
"question"
],
"title": "polybridge_forecastArguments"
}Output Schema
{
"type": "object",
"properties": {
"request_id": {
"title": "Request Id",
"type": "string"
},
"question": {
"title": "Question",
"type": "string"
},
"probability": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
],
"default": null,
"title": "Probability"
},
"confidence": {
"title": "Confidence",
"type": "number"
},
"confidence_interval": {
"anyOf": [
{
"$ref": "#/$defs/ConfidenceInterval"
},
{
"type": "null"
}
],
"default": null
},
"reasoning": {
"title": "Reasoning",
"type": "string"
},
"engine_type": {
"$ref": "#/$defs/EngineType"
},
"causal_graph": {
"anyOf": [
{
"$ref": "#/$defs/CausalGraphView"
},
{
"type": "null"
}
],
"default": null
},
"markets_used": {
"items": {
"$ref": "#/$defs/MarketSummary"
},
"title": "Markets Used",
"type": "array"
},
"distribution": {
"anyOf": [
{
"additionalProperties": {
"type": "number"
},
"type": "object"
},
{
"type": "null"
}
],
"default": null,
"title": "Distribution"
},
"latency_ms": {
"title": "Latency Ms",
"type": "integer"
},
"error": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"default": null,
"title": "Error"
},
"metadata": {
"additionalProperties": true,
"default": {},
"title": "Metadata",
"type": "object"
}
},
"required": [
"request_id",
"question",
"confidence",
"reasoning",
"engine_type",
"markets_used",
"latency_ms"
],
"$defs": {
"CausalGraphView": {
"properties": {
"nodes": {
"items": {
"$ref": "#/$defs/GraphNode"
},
"title": "Nodes",
"type": "array"
},
"edges": {
"items": {
"$ref": "#/$defs/GraphEdge"
},
"title": "Edges",
"type": "array"
}
},
"required": [
"nodes",
"edges"
],
"title": "CausalGraphView",
"type": "object"
},
"ConfidenceInterval": {
"properties": {
"lower": {
"title": "Lower",
"type": "number"
},
"upper": {
"title": "Upper",
"type": "number"
}
},
"required": [
"lower",
"upper"
],
"title": "ConfidenceInterval",
"type": "object"
},
"EngineType": {
"enum": [
"llm_standin",
"math_engine",
"oracle_port",
"llm_fallback"
],
"title": "EngineType",
"type": "string"
},
"GraphEdge": {
"properties": {
"source": {
"title": "Source",
"type": "string"
},
"target": {
"title": "Target",
"type": "string"
},
"relationship": {
"title": "Relationship",
"type": "string"
},
"strength": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
],
"title": "Strength"
},
"description": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Description"
}
},
"required": [
"source",
"target",
"relationship",
"strength",
"description"
],
"title": "GraphEdge",
"type": "object"
},
"GraphNode": {
"properties": {
"id": {
"title": "Id",
"type": "string"
},
"label": {
"title": "Label",
"type": "string"
},
"markets": {
"items": {
"$ref": "#/$defs/MarketSummary"
},
"title": "Markets",
"type": "array"
},
"current_probability": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
],
"title": "Current Probability"
}
},
"required": [
"id",
"label",
"markets",
"current_probability"
],
"title": "GraphNode",
"type": "object"
},
"MarketSummary": {
"properties": {
"id": {
"format": "uuid",
"title": "Id",
"type": "string"
},
"question": {
"title": "Question",
"type": "string"
},
"platform": {
"$ref": "#/$defs/Platform"
},
"current_prices": {
"anyOf": [
{
"additionalProperties": {
"type": "number"
},
"type": "object"
},
{
"type": "null"
}
],
"default": null,
"title": "Current Prices"
},
"platform_url": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"default": null,
"title": "Platform Url"
}
},
"required": [
"id",
"question",
"platform"
],
"title": "MarketSummary",
"type": "object"
},
"Platform": {
"enum": [
"polymarket",
"kalshi"
],
"title": "Platform",
"type": "string"
}
},
"title": "ForecastResponse"
}Community
Evidence
Recent observations
verifiedversion not recorded2 tools
verifiedversion not recorded2 tools
verifiedversion not recorded2 tools