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PerpCheck by YourAITools
x402
PerpCheck by YourAITools is a paid API for AI agents from api.youraitools.co, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-24).
Pre-trade validation of a Hyperliquid perpetuals order, returning REJECT_LIKELY / CAUTION / OK with specific rule violations and fix values
Price / call$0.003
Success—
StatusUnknown
How this service works
Hyperliquid order checker API (pre-trade). Pre-trade check of a Hyperliquid perp order before you send it: REJECT_LIKELY / CAUTION / OK, each exchange-rule issue with a fix value (size decimals, price tick, $10 minimum, max leverage by margin tier, isolated-only, OI cap, delisted, far-from-mark limit), warnings and the coin rules. Read-only; never places or signs orders. Fail-closed: a failed source is listed, never OK. Not financial advice; the exchange decides whether an order is accepted.
Output
A JSON object with a verdict field (REJECT_LIKELY, CAUTION, or OK), an issues array each containing a code, human-readable message, and a suggested fix value, a warnings array for non-fatal concerns (e.g. marketable limit), the full coin rules (szDecimals, max_leverage, min_notional_usd, price tick), confidence level, a list of any data sources that failed, and a disclaimer confirming no order was placed.
Example use cases
Catching size decimal errors before submission
“I want to open a long HYPE perp on Hyperliquid with a size of 1.00000 and a limit price of 42.157, cross margin at 5x — can you pre-check whether the size and price decimals are valid before I send it?”
Verifying leverage is within tier limits
“Can you check if a 50x leveraged short on kPEPE on Hyperliquid for a notional of $200 USD, using isolated margin, would likely be rejected or accepted?”
Minimum notional compliance check
“I'm trying to place a long BTC perp order on Hyperliquid for 0.00001 BTC at a limit price of 67000, cross margin, 1x leverage — is the order value above the $10 minimum or will it get rejected?”
Technical details
Endpoint
GEThttps://api.youraitools.co/perpcheck/v1/lite?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to validate a Hyperliquid perpetuals order before submission — especially to catch size decimal mismatches, price tick violations, minimum notional breaches, leverage tier limits, isolated-only restrictions, OI caps, or delisted coins. It is read-only and fail-closed, making it safe to call in any automated trading workflow without risk of placing an order. Prefer it over generic exchange rule lookups when you need a per-order verdict with actionable fix values rather than just static rule documentation.
Side effects
- Coin not found or delisted — verdict includes a 'delisted' issue code
- Source data unavailable — sources_failed is populated and verdict is never OK (fail-closed)
- Invalid enum for side or margin — request rejected with schema validation error
- Price or size provided as non-numeric string — parsing error returned
- Network timeout fetching Hyperliquid L2 book for market order estimation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"coin": "ETH",
"side": "long",
"size": 0.0012,
"tier": "lite",
"rules": {
"szDecimals": 4,
"max_leverage": 25,
"only_isolated": false,
"min_notional_usd": 10,
"price_max_decimals": 2,
"price_max_sig_figs": 5,
"max_leverage_at_size": 25
},
"issues": [
{
"msg": "order value $3.70 is below Hyperliquid's $10 minimum",
"code": "min_notional"
},
{
"fix": 0.0012,
"msg": "size has 7 decimals; this coin allows 4 (szDecimals)",
"code": "size_decimals"
},
{
"fix": 3000.1,
"msg": "price has 3 decimals; max for this coin is 2",
"code": "price_tick"
},
{
"fix": 25,
"msg": "leverage 60x is above the 25x maximum for this coin at $4 notional",
"code": "leverage"
}
],
"margin": "cross",
"verdict": "REJECT_LIKELY",
"leverage": 60,
"warnings": [
{
"msg": "limit buy above mark by 25.37%: fills immediately as taker",
"code": "marketable_limit"
}
],
"checked_at": "2026-10-23T19:20:07.798Z",
"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": "limit",
"reduce_only": false,
"notional_usd": 3.7,
"sources_failed": []
}
}Tags
x402
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