# MCPFax Markets — Cross-Venue Prediction Market Search

> MCPFax Markets — Cross-Venue Prediction Market Search is a paid API for AI agents from mcpfax-markets.bowling-anthony.workers.dev, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-15).

Searches prediction markets across multiple platforms (e.g. Polymarket, Manifold) using a keyword or topic query, returning matching markets from all supported venues in one call.

## Facts

- Endpoint: GET https://mcpfax-markets.bowling-anthony.workers.dev/prediction-markets/search
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mcpfax-markets-cross-venue-prediction-market-search-c6eb8fed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rPqv3KugRRkKQt6HpWbrx

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability mcpfax-markets-cross-venue-prediction-market-search-c6eb8fed
```

Example prompt: Search prediction markets across Polymarket and Manifold for anything related to the Federal Reserve interest rate decision next month and show me the top results with their current probabilities.

## When to prefer this

Use this endpoint when you need to search across multiple prediction market platforms simultaneously rather than querying Polymarket or Manifold individually. It is ideal for discovery — finding which markets exist on a topic — rather than fetching deep detail on a single known market. Prefer the platform-specific siblings (polymarket_events, manifold_markets) when you need richer metadata or event-level detail from one specific venue.

## Known failure modes

- No markets found for obscure or very niche query terms
- Stale market data if underlying platforms have not recently updated
- Payment failure if insufficient USDC balance for the $0.002 per call fee
- Rate limiting or timeout if the underlying prediction market APIs are slow
- Partial results if one or more venues are temporarily unavailable

## How this service works

MCPFax markets — Cross-venue market search (prediction_market_search). Price: $0.002 USDC per call on Base.

## Output

A list of matching prediction markets from across supported venues, including market titles, current probabilities or prices, platform/venue names, and links or identifiers to each market — all aggregated from a single cross-venue query.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mcpfax-markets-cross-venue-prediction-market-search-c6eb8fed/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcpfax-markets.bowling-anthony.workers.dev](https://www.zero.xyz/host/mcpfax-markets.bowling-anthony.workers.dev/llms.txt)