# Polymarket Search

> Polymarket Search is a paid API for AI agents from bess-x402.onrender.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-28).

Search Polymarket prediction markets by keyword and retrieve live outcome probabilities, bid/ask spreads, volume, liquidity, and links for matching events.

## Facts

- Endpoint: GET https://bess-x402.onrender.com/v1/predictions/polymarket/search?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polymarket-search-1b05fcb8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p_iI7O5DVUoIvFsfJTKtJ

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 polymarket-search-1b05fcb8
```

Example prompt: What does Polymarket currently think about the Fed cutting interest rates — show me the live odds, volume, and best bid/ask for the top 5 matching markets.

## When to prefer this

Use this endpoint when you need to discover multiple Polymarket prediction markets matching a topic keyword and want live probability data at scale. Prefer this over the single-market endpoint when you don't have a specific market slug or ID and want to explore what markets exist. Best for answering 'what does the market think about X' questions across a broad topic area.

## Known failure modes

- No markets found for the keyword — returns empty result set
- Query string missing — returns 400 bad request
- Limit out of range (below 1 or above 30) — returns validation error
- Polymarket API upstream unavailable — returns 502/503 error
- Rate limiting or payment verification failure — returns 402 payment required

## How this service works

Search open Polymarket prediction markets by keyword (election, bitcoin, fed, AI...) and get each event's markets with live outcome probabilities, best bid/ask, 24h and total volume, liquidity, end date and link. Use to answer what the market thinks will happen, or to find a market to trade.

## Output

A list of matching Polymarket events, each containing one or more markets with: the question text, current outcome probabilities for each option, best bid and ask prices, 24-hour and total trading volume, available liquidity, market end/resolution date, and a direct link to the market on Polymarket.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "description": "Search words"
      },
      "limit": {
       "type": "integer",
       "description": "Maximum number of results (1-30)"
      }
     }
    }
   },
   "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/polymarket-search-1b05fcb8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bess-x402.onrender.com](https://www.zero.xyz/host/bess-x402.onrender.com/llms.txt)