# Polymarket Outcome Token Holders — mito.trade

> Polymarket Outcome Token Holders — mito.trade is a paid API for AI agents from data.mito.trade, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Returns the list of wallet holders and count for a given Polymarket outcome token, sourced from on-chain Polygon/Base/Arbitrum data.

## Facts

- Endpoint: GET https://data.mito.trade/x402/v1/holders
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polymarket-outcome-token-holders-mito-trade-6eee2016
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_j-BbCUZJJz2QkPKEgrump

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-outcome-token-holders-mito-trade-6eee2016
```

Example prompt: Show me all the wallet holders for Polymarket outcome token 123456789 — I want to know how many addresses hold it and what block the data is from.

## When to prefer this

Use this endpoint when you need to know the holder distribution or count for a specific Polymarket outcome token by its decimal token ID. Prefer this over general Polymarket APIs when you want on-chain verified holder data with block-level provenance on Polygon, Base, or Arbitrum.

## Known failure modes

- Missing or invalid token_id returns an error or empty result
- token_id for a non-existent outcome token returns empty holders array
- Payment failure (x402) if USDC funds are insufficient
- Rate limiting if too many requests are made in quick succession
- Stale data if on-chain indexing lags behind latest block

## How this service works

Polymarket prediction-market data API (x402 paid): wallet positions, trades, holders, market trades, klines, and markets. USDC on Polygon, Base, or Arbitrum.

## Output

Returns a JSON object containing a list of wallet addresses holding the specified outcome token, the total holder count, and the block number and timestamp at which the data was captured.

## 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",
     "required": [
      "token_id"
     ],
     "properties": {
      "token_id": {
       "type": "string",
       "description": "Outcome token id (decimal string)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "count": {
       "type": "integer"
      },
      "holders": {
       "type": "array"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "block_number": 0,
   "block_timestamp": 0
  },
  "count": 0,
  "holders": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polymarket-outcome-token-holders-mito-trade-6eee2016/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data.mito.trade](https://www.zero.xyz/host/data.mito.trade/llms.txt)