PerpCheck by YourAITools

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "X-PAYMENT header is required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.youraitools.co/perpcheck/v1/lite",
      "description": "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.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "coin": {
              "type": "string",
              "required": true,
              "description": "Hyperliquid main-dex perp name, e.g. BTC, ETH, SOL, HYPE, kPEPE"
            },
            "side": {
              "type": "string",
              "required": true,
              "description": "long/buy or short/sell"
            },
            "size": {
              "type": "string",
              "required": false,
              "description": "Order size in coins, exactly as you would send it (decimals are checked), e.g. 0.001. Give size or notional."
            },
            "price": {
              "type": "string",
              "required": false,
              "description": "Limit price exactly as you would send it (tick rule is checked). Omit for a market order (then taker impact is estimated from the L2 book)."
            },
            "margin": {
              "type": "string",
              "required": false,
              "description": "cross (default) or isolated"
            },
            "leverage": {
              "type": "number",
              "required": false,
              "description": "Leverage, e.g. 10 (default 1)"
            },
            "notional": {
              "type": "number",
              "required": false,
              "description": "Order value in USD (instead of size), e.g. 100"
            },
            "reduceOnly": {
              "type": "boolean",
              "required": false,
              "description": "true if the order only reduces a position (exempt from the minimum and OI cap)"
            }
          },
          "discoverable": true
        },
        "output": {
          "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": []
        }
      },
      "maxAmountRequired": "3000",
      "maxTimeoutSeconds": 120
    }
  ],
  "message": "Payment required: PerpCheck GET /perpcheck/v1/lite costs $0.003 per call in USDC. Will this Hyperliquid perp order be rejected, and what does it cost and risk? Pay per call in USDC with any x402 client: read the PAYMENT-REQUIRED header (x402 v2) or the accepts list in this body (x402 v1), sign the payment and retry the same request with the PAYMENT-SIGNATURE (v2) or X-PAYMENT (v1) header. Networks: Base, Polygon, Arbitrum, Solana. No account, no API key. No crypto wallet? Buy prepaid credits by card or USDC at https://api.youraitools.co/credits/ and send them as a Bearer key. Free: 30 calls/day (full checks via remote MCP, tool check_perp_order), then $0.003 lite / $0.01 full per call in USDC (not financial advice)",
  "x402Version": 1,
  "payment_help": {
    "docs": "https://api.youraitools.co/perpcheck/",
    "tool": "PerpCheck",
    "what": "Will this Hyperliquid perp order be rejected, and what does it cost and risk? A read-only pre-trade check of the order a trading agent is about to send: REJECT_LIKELY / CAUTION / OK with each exchange-rule issue and a fix value (size decimals, price tick, $10 minimum, max leverage by margin tier, isolated-only, open-interest cap, delisted, far-from-mark), plus isolated liquidation estimate, taker impact from the live L2 book and funding carry (full). Never places, signs or holds orders. Fail-closed: a failed source is never OK. Not financial advice; the exchange decides whether an order is accepted.",
    "price": "$0.003 per call (USDC)",
    "route": "GET https://api.youraitools.co/perpcheck/v1/lite",
    "mcp_hub": "https://api.youraitools.co/mcp/hub",
    "free_tier": "30 calls/day (full checks via remote MCP, tool check_perp_order), then $0.003 lite / $0.01 full per call in USDC (not financial advice)",
    "pay_with_x402": "Pay per call in USDC with any x402 client: read the PAYMENT-REQUIRED header (x402 v2) or the accepts list in this body (x402 v1), sign the payment and retry the same request with the PAYMENT-SIGNATURE (v2) or X-PAYMENT (v1) header. Networks: Base, Polygon, Arbitrum, Solana. No account, no API key.",
    "pay_with_credits": {
      "url": "https://api.youraitools.co/credits/",
      "use": "Send the key as Authorization: Bearer yatc_... on the same request; each call is deducted at the listed price.",
      "card": "Pay by card (Stripe): $5, $20 or $50 credit packs, no crypto wallet needed.",
      "wallet": "Or buy $1 or $5 of credits in USDC with the one-click browser wallet button on the same page.",
      "card_checkout": "https://api.youraitools.co/credits/ (choose a pack under Pay by card; Stripe checkout opens in one click)"
    }
  }
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F",
    "amount": "3000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "coin": "BTC",
          "side": "long",
          "size": "0.001",
          "leverage": 10
        }
      },
      "output": {
        "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 $4 notional",
              "code": "leverage"
            }
          ],
          "margin": "cross",
          "verdict": "REJECT_LIKELY",
          "leverage": 60,
          "warnings": [
            {
              "msg": "limit buy above mark by 25.37%: fills immediately as taker",
              "code": "marketable_limit"
            }
          ],
          "checked_at": "2026-10-23T19:20:07.798Z",
          "confidence": "high",
          "disclaimer": "Not financial advice; the exchange decides whether an order is accepted. PerpCheck is a read-only pre-trade check: it never places, signs or holds orders, has no custody and never asks for keys.",
          "order_type": "limit",
          "reduce_only": false,
          "notional_usd": 3.7,
          "sources_failed": []
        }
      }
    },
    "schema": {
      "type": "object",
      "$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": [
                "coin",
                "side"
              ],
              "properties": {
                "coin": {
                  "type": "string",
                  "description": "Hyperliquid main-dex perp name, e.g. BTC, ETH, SOL, HYPE, kPEPE"
                },
                "side": {
                  "enum": [
                    "long",
                    "short",
                    "buy",
                    "sell"
                  ],
                  "type": "string",
                  "description": "long/buy or short/sell"
                },
                "size": {
                  "type": "string",
                  "description": "Order size in coins, exactly as you would send it (decimals are checked), e.g. 0.001. Give size or notional."
                },
                "price": {
                  "type": "string",
                  "description": "Limit price exactly as you would send it (tick rule is checked). Omit for a market order (then taker impact is estimated from the L2 book)."
                },
                "margin": {
                  "enum": [
                    "cross",
                    "isolated"
                  ],
                  "type": "string",
                  "description": "cross (default) or isolated"
                },
                "leverage": {
                  "type": "number",
                  "description": "Leverage, e.g. 10 (default 1)"
                },
                "notional": {
                  "type": "number",
                  "description": "Order value in USD (instead of size), e.g. 100"
                },
                "reduceOnly": {
                  "type": "boolean",
                  "description": "true if the order only reduces a position (exempt from the minimum and OI cap)"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog

2026-10-24 22:10Z

Last indexed by Roundhouse

2026-10-26 20:46Z

Last enriched (probe, favicon, geo)

2026-10-25 11:45Z

x402 version

2

Max timeout

120s

Liveness probe

HTTP 402