# BlockRun.AI Polymarket Top Holders

> BlockRun.AI Polymarket Top Holders is a paid API for AI agents from blockrun.ai, paid per call via x402, $0.0085/call, status unknown (last checked 2026-09-14).

Returns the top holders for a specific Polymarket prediction market, ranked by position size

## Facts

- Endpoint: GET https://blockrun.ai/api/v1/pm/polymarket/market/:hash/top-holders
- Price: $0.0085/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockrun-ai-8e8a8f75
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nW6xzSSepEfwABJf9APw-

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 blockrun-ai-8e8a8f75
```

Example prompt: Who are the top holders in the Polymarket market with hash 0xabc123...? I want to see the biggest positions ranked by size.

## When to prefer this

Use this endpoint when you need to identify the largest position holders (whales) in a specific Polymarket prediction market, identified by its market hash. Ideal for market analysis, tracking smart money, or understanding concentration of positions in a given prediction market event.

## Known failure modes

- Invalid or non-existent market hash returns empty or error response
- Market hash not found on Polymarket returns 404 or empty data
- Payment not processed (x402 payment required) results in 402 error
- Malformed hash parameter causes bad request error
- Network timeout if Polymarket data is temporarily unavailable

## How this service works

Get top holders for a specific market ranked by position size

## Output

A ranked list of the top wallet holders for the specified Polymarket market, including wallet addresses and their respective position sizes ordered from largest to smallest.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "query": {
     "type": "object",
     "required": [],
     "properties": {}
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "example": {
     "type": "object",
     "properties": {
      "data": {
       "type": "object"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockrun-ai-8e8a8f75/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from blockrun.ai](https://www.zero.xyz/host/blockrun.ai/llms.txt)