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PerpCheck
x402
PerpCheck is a paid API for AI agents from perpcheck.agentgate.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).
Pre-trade validation for Hyperliquid perpetual futures orders: returns verdict (OK/CAUTION/REJECT_LIKELY) with rule violations, liquidation estimate, slippage, and funding cost
Price / call$0.01
Success—
StatusUnknown
How this service works
Pre-trade order check for Hyperliquid perps, for trading agents: will this order be rejected, and what does it cost and risk? Send coin, side, size or notional, optional limit price, leverage, cross/isolated and reduce-only. Returns REJECT_LIKELY / CAUTION / OK with each exchange-rule problem and a fix value (size decimals, price tick, $10 minimum, max leverage by margin tier, isolated-only, open-interest cap, delisted, far-from-mark limits), plus isolated liquidation estimate, taker impact from the live L2 book, funding carry per day and size vs 24 h volume. Read-only: never places, signs or holds orders. Fail-closed. Paid per call over x402 or prepaid credits; free preview and free remote MCP tier. Not financial advice; the exchange decides whether an order is accepted. Not financial advice; the exchange decides whether an order is accepted. PerpCheck is a read-only pre-trade check: it never places, signs or holds orders, has no custody and never asks for keys.
Output
A JSON object with: a verdict field (OK, CAUTION, or REJECT_LIKELY); an issues array listing each exchange-rule problem with a fix value (e.g. correct size decimals, price tick, minimum notional, max leverage for the margin tier, OI cap breach, delisted coin, far-from-mark price); warnings array for non-blocking concerns; market data (mark price, oracle, premium bps, 24h volume, open interest); funding object (hourly rate, direction, estimated daily cost in USD); execution object (mid price, spread bps, estimated average fill, impact bps, book depth covered); liquidation estimate (isolated-equivalent distance and price); confidence level; and a disclaimer.
Example use cases
Validate perp order before submission
“I want to go long 0.1 ETH on Hyperliquid at a limit price of 3200, with 5x leverage in isolated margin — will the order get rejected, and what are the rule issues I need to fix?”
Estimate liquidation price for leveraged position
“If I short 50 SOL on Hyperliquid with 20x cross margin, what's the estimated liquidation price and how far is that from the current mark?”
Assess funding cost and slippage for large trade
“I'm thinking about opening a $50,000 notional long on HYPE perps at 3x leverage — what will the taker slippage and daily funding cost look like, and is there enough depth in the order book to fill it cleanly?”
Technical details
Endpoint
GEThttps://perpcheck.agentgate.workers.dev/v1/full?utm_source=zero.xyzWhen to prefer
Use PerpCheck when an AI trading agent needs to validate a Hyperliquid perpetual futures order before submission — especially to catch exchange-rule rejections (size decimals, price tick, minimum notional, max leverage by tier, OI caps), estimate liquidation risk, assess taker slippage from the live L2 book, and quantify daily funding carry. Prefer this over generic slippage calculators because it is Hyperliquid-specific, checks all exchange rules simultaneously, and returns structured fix values. It is read-only and has no custody or signing — safe to call speculatively.
Side effects
- Unknown or delisted coin returns a REJECT_LIKELY verdict with 'delisted' rule issue
- Missing required fields (coin, side) returns a 400-level error
- L2 book unavailable causes sources_failed to list 'book' and execution estimates may be omitted
- Hyperliquid API timeout may reduce confidence to 'low' or return partial results
- Extremely small size below $10 notional triggers min_notional_usd rule issue
- Price far from mark triggers far-from-mark rule violation in the issues array
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"coin": "BTC",
"side": "long",
"size": 0.001,
"tier": "full",
"rules": {
"szDecimals": 5,
"max_leverage": 40,
"only_isolated": false,
"min_notional_usd": 10,
"price_max_decimals": 1,
"price_max_sig_figs": 5,
"max_leverage_at_size": 40
},
"issues": [],
"margin": "cross",
"market": {
"mark": 81274,
"oracle": 81279.6,
"premium_bps": -0.69,
"day_volume_usd": 1978449099,
"open_interest_usd": 3634646602,
"size_vs_day_volume_pct": 0
},
"funding": {
"apr_pct": 10.95,
"direction": "you pay",
"hourly_rate": 0.0000125,
"est_cost_per_day_usd": 0.0244
},
"verdict": "OK",
"leverage": 10,
"warnings": [],
"execution": {
"mid": 81274.5,
"book_time": 1792783206472,
"spread_bps": 0.12,
"est_avg_fill": 81275,
"est_impact_bps": 0.06,
"book_depth_covered": 1
},
"checked_at": "2026-10-23T19:20:07.089Z",
"confidence": "high",
"disclaimer": "Not financial advice; the exchange decides whether an order is accepted. PerpCheck is a read-only pre-trade check: it never places, signs or holds orders, has no custody and never asks for keys.",
"order_type": "market",
"liquidation": {
"note": "cross margin: the real liquidation price depends on your whole account; this is the isolated-equivalent worst case",
"distance_pct": 8.86,
"estimate_isolated": 74072.5
},
"reduce_only": false,
"notional_usd": 81.27,
"sources_failed": []
}
}Tags
x402
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