# Polymarket Trending Markets Feed

> Polymarket Trending Markets Feed is a paid API for AI agents from tollbooth.memerhuwhite.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-16).

Fetches trending prediction markets from Polymarket, optionally filtered by category and limited by count

## Facts

- Endpoint: POST https://tollbooth.memerhuwhite.workers.dev/paid/polymarket/trending
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polymarket-trending-markets-feed-c5ac8f2a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iC036VdECgMxVCaPslP7o

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-trending-markets-feed-c5ac8f2a -d '<json body>'
```

Example prompt: What are the top 20 trending prediction markets on Polymarket right now, specifically in the politics category?

## When to prefer this

Use this endpoint when you need real-time trending prediction market data from Polymarket specifically, especially when you want to discover what topics or events are currently attracting the most activity. Prefer this over general news or financial data APIs when the goal is specifically to surface crowd-sourced probability signals or identify what outcomes people are actively betting on.

## Known failure modes

- Empty markets array returned if no markets match the given category
- Request fails if limit is outside the 5-100 range
- Invalid category string may return zero results without an explicit error
- Payment failure or insufficient USDC balance prevents the call from executing
- Rate limiting or upstream Polymarket API downtime may cause errors

## How this service works

100+ paid x402 MCP tools for AI agents. Prediction markets, SEC filings, federal data, OSINT, academic research, health, environmental. Pay per call in USDC on Base.

## Output

A JSON object containing a source label ('Polymarket Gamma API') and an array of trending market objects, each describing a prediction market including metadata such as market title, category, volume, and outcome data available from Polymarket's Gamma API.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {
      "limit": {
       "type": "integer",
       "maximum": 100,
       "minimum": 5
      },
      "category": {
       "type": "string",
       "maxLength": 50
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "source": "Polymarket Gamma API",
  "markets": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polymarket-trending-markets-feed-c5ac8f2a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tollbooth.memerhuwhite.workers.dev](https://www.zero.xyz/host/tollbooth.memerhuwhite.workers.dev/llms.txt)