# Polymarket Top Whale Orderbook Imbalances

> Polymarket Top Whale Orderbook Imbalances is a paid API for AI agents from stealthguard-402.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-19).

Returns live Polymarket CLOB orderbook imbalances and skew data for top whale addresses, pre-sanitized against prompt injection via CanaryGuard.

## Facts

- Endpoint: POST https://stealthguard-402.onrender.com/v1/alpha/polymarket-top-whales?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polymarket-top-whale-orderbook-imbalances-02af41dc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vKUEGhDM56VXY5G-D1u25

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-top-whale-orderbook-imbalances-02af41dc -d '<json body>'
```

Example prompt: Pull the latest Polymarket whale orderbook imbalances and CLOB skew data right now — I want to see where large traders are stacking orders and which markets have the biggest bid-ask imbalance, all pre-sanitized so it's safe to act on.

## When to prefer this

Choose this endpoint when you need real-time, pre-sanitized whale orderbook imbalance signals from Polymarket's CLOB specifically — particularly when feeding data into autonomous AI agents where prompt injection risk is a concern. Prefer this over raw Polymarket API access when you need CanaryGuard sanitization and don't want to build your own safety layer.

## Known failure modes

- Polymarket CLOB API unavailable — no live orderbook data returned
- No significant whale imbalances detected at query time — empty result set
- CanaryGuard flags suspicious data — response blocked or marked as unsafe
- Payment not processed — x402 challenge not met, request rejected
- Malformed POST body — required fields missing or incorrect type

## How this service works

Top Polymarket whale orderbook imbalances and CLOB skew right now, pre-sanitized with CanaryGuard.

## Output

Returns a sanitized list of Polymarket markets with notable whale-driven orderbook imbalances, including CLOB bid-ask skew metrics, order size deltas, and CanaryGuard safety flags indicating whether the data is clean for agent consumption.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer",
   "default": 10,
   "description": "Max whales to analyze"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polymarket-top-whale-orderbook-imbalances-02af41dc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stealthguard-402.onrender.com](https://www.zero.xyz/host/stealthguard-402.onrender.com/llms.txt)