# MCPFax Polymarket Market & Order Book

> MCPFax Polymarket Market & Order Book 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).

Fetches detailed Polymarket prediction market data and order book for a specific market by ID

## Facts

- Endpoint: GET https://mcpfax-markets.bowling-anthony.workers.dev/polymarket/market
- 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-polymarket-market-order-book-85be83c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0dnKJfbHvkgx50NHk6P1m

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-market-order-book-85be83c5
```

Example prompt: Pull up the Polymarket order book and current odds for the 'Will the Fed cut rates in Q3 2025?' market — I want to see the best bids, asks, and how much liquidity is available.

## When to prefer this

Use this endpoint when you need granular, per-market detail about a specific Polymarket market including its live order book — as opposed to the polymarket_events endpoint which lists multiple events at once. Ideal when you already have a market ID or slug and need current prices, liquidity depth, and bid/ask data for trading decisions or analysis.

## Known failure modes

- Invalid or unknown market ID returns an error or empty result
- Market may be resolved/closed and no longer have an active order book
- Rate limiting or payment failure if USDC balance is insufficient
- Network timeout if Polymarket API is temporarily unavailable
- Malformed request body returns a 400 error

## How this service works

MCPFax markets — Polymarket market + order book (polymarket_market). Price: $0.002 USDC per call on Base.

## Output

Returns detailed information about a specific Polymarket prediction market including market metadata (title, description, status, end date), outcome token prices, current order book with bids and asks at various price levels, trading volume, total liquidity, and market resolution status.

## 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-market-order-book-85be83c5/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)