# Polymarket Insider Wallet Activity Detector

> Polymarket Insider Wallet Activity Detector is a paid API for AI agents from cryptointel-production.up.railway.app, paid per call via x402, $0.89/call, status unknown (last checked 2026-09-14).

Detects fresh wallets placing abnormally large bets on Polymarket prediction markets, flagging potential insider trading activity

## Facts

- Endpoint: GET https://cryptointel-production.up.railway.app/insider
- Price: $0.89/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polymarket-insider-wallet-activity-detector-c85b751e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ot-DDsRAG9709rKizMS1I

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-insider-wallet-activity-detector-c85b751e
```

Example prompt: Show me the top 20 fresh wallets (under 5 days old) placing unusually large bets on Polymarket — flag anything above $1,000 USD as suspicious insider activity.

## When to prefer this

Use this endpoint when you want on-chain behavioral signals specifically from Polymarket prediction markets, particularly to detect whether new/unknown wallets are placing suspiciously large bets that could indicate foreknowledge of an outcome. Prefer this over general wallet analysis when the focus is prediction market insider activity rather than general portfolio or transaction history.

## Known failure modes

- No fresh wallets found matching the criteria — returns empty data array
- Polymarket API unavailable — service may return 503 or timeout
- Invalid query parameter types (e.g. non-numeric min_usd) — returns 400 validation error
- Rate limiting or payment failure — returns 402 if x402 payment not processed correctly

## How this service works

Agent-native crypto intelligence API — prices, signals, insider detection, on-chain due diligence, trade decisions. Pay-per-call in USDC on Base or Solana.

## Output

Returns a list of flagged wallet addresses with their age, bet sizes in USD, Polymarket positions they're betting on, and an insider activity signal score. Includes metadata like total results found and filter parameters used.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "limit": 20,
   "min_usd": 1000,
   "max_wallet_age_days": 5
  }
 }
}
```

## 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",
     "properties": {
      "limit": {
       "type": "number",
       "description": "Max results (default 10)"
      },
      "min_usd": {
       "type": "number",
       "description": "Min bet size in USD to flag (default 500)"
      },
      "max_wallet_age_days": {
       "type": "number",
       "description": "Max wallet age in days to consider fresh (default 7)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "data": {
       "type": "object"
      },
      "fee_paid": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "signals": [
   {
    "price": 0.73,
    "market": "Will BTC hit $100k before July 2026?",
    "wallet": "0xabc...",
    "outcome": "YES",
    "trade_usd": 1200,
    "insider_score": 87,
    "wallet_age_days": 2
   }
  ],
  "fee_paid": "$0.89",
  "scanned_trades": 500
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polymarket-insider-wallet-activity-detector-c85b751e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cryptointel-production.up.railway.app](https://www.zero.xyz/host/cryptointel-production.up.railway.app/llms.txt)