# MCPFax Polymarket Markets

> MCPFax Polymarket Markets is a paid API for AI agents from mcpfax-markets.bowling-anthony.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Fetches a list of Polymarket prediction markets with pricing and metadata

## Facts

- Endpoint: GET https://mcpfax-markets.bowling-anthony.workers.dev/polymarket/markets
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mcpfax-polymarket-markets-ce03314c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KDLSvMa4H0ga_k2088hd_

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-polymarket-markets-ce03314c
```

Example prompt: Show me the currently active prediction markets on Polymarket — I want to see what topics are available to trade on right now, especially anything related to the US election or crypto.

## When to prefer this

Use this endpoint when you need to discover or browse active Polymarket prediction markets, check current odds, or find markets on specific topics. Prefer this over polymarket_events when you want market-level granularity (prices, liquidity) rather than event-level groupings.

## Known failure modes

- Payment failure if USDC balance on Base is insufficient (x402 payment required)
- Polymarket API downtime causing empty or error responses
- No markets returned if filter criteria match nothing
- Rate limiting or throttling if called too frequently

## How this service works

MCPFax markets — Polymarket markets (polymarket_markets). Price: $0.001 USDC per call on Base.

## Output

Returns a list of Polymarket prediction markets including market titles, current outcome prices/probabilities, liquidity, volume, open/close status, and market identifiers. Each entry describes a binary or categorical outcome market on the Polymarket platform.

## 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-polymarket-markets-ce03314c/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)