Api Endpoint

x402.presenceoperations.com

What it would cost to execute a given notional in a given market right now: size-weighted fill price, slippage from the touch in basis points, and whether the visible book can absorb the size at all.

Open interactive test console

Offering

Provider: x402.presenceoperations.com
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Blockchain And Crypto
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://x402.presenceoperations.com/services/execution-cost
MIME type: application/json
First seen: 2026-10-16T01:58:03.323Z
Last seen: 2026-11-02T17:10:16.369Z
Tags: None supplied

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.0048 USDC
Atomic price: 4800 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "4800",
    "payTo": "0x51edd63F074EaB0b1AB94c7BCf8b1e3aD43F1D2f"
  }
]

Observed health

Status: Healthy
Latest latency: 321 ms
Average latency: 798 ms
HTTP status: 402
Last checked: 2026-11-02T17:10:16.361Z
Reachability: 100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "market": {
          "type": "string",
          "description": "the perpetual market to price, upper-cased before matching, for example BTC-PERP",
          "pattern": "^[A-Z0-9]{1,16}-PERP$"
        },
        "notional": {
          "type": "number",
          "description": "the size to price, in quote currency, bounded so one paid call cannot become an unbounded read of the venue",
          "minimum": 1,
          "maximum": 100000000
        },
        "side": {
          "type": "string",
          "description": "which side of the book to walk; omitted means BUY, and anything outside BUY or SELL is refused rather than answered as the default, so a misspelled side is never charged for",
          "enum": [
            "BUY",
            "SELL"
          ],
          "default": "BUY"
        }
      },
      "required": [
        "market",
        "notional"
      ],
      "additionalProperties": false
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET"
          ],
          "type": "string"
        },
        "queryParams": {
          "additionalProperties": false,
          "properties": {
            "market": {
              "description": "the perpetual market to price, upper-cased before matching, for example BTC-PERP",
              "pattern": "^[A-Z0-9]{1,16}-PERP$",
              "type": "string"
            },
            "notional": {
              "description": "the size to price, in quote currency, bounded so one paid call cannot become an unbounded read of the venue",
              "maximum": 100000000,
              "minimum": 1,
              "type": "number"
            },
            "side": {
              "default": "BUY",
              "description": "which side of the book to walk; omitted means BUY, and anything outside BUY or SELL is refused rather than answered as the default, so a misspelled side is never charged for",
              "enum": [
                "BUY",
                "SELL"
              ],
              "type": "string"
            }
          },
          "required": [
            "market",
            "notional"
          ],
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "type": "object"
    }
  },
  "type": "object"
}