What it would cost to execute a given notional in a given market right now
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.
Not tested: has real-world effectsour last check, 2026-10-10
0 of 0checks answered this week
n/amedian answer time
$0.0048listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://x402.presenceoperations.com/services/execution-cost
| Category | Code and developer |
|---|---|
| Provider host | x402.presenceoperations.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"market": "BTC-PERP",
"notional": 1000,
"side": "BUY"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$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"
}