{"slug":"x402-presenceoperations-com-services-execution-cost-c04f24","title":"What it would cost to execute a given notional in a given market right now","host":"x402.presenceoperations.com","method":"GET","resource":"https://x402.presenceoperations.com/services/execution-cost","category":"code","description":"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.","price_listed":0.0048,"price_asked":null,"state":"effects","state_label":"Not tested: has real-world effects","checks_7d":0,"answered_7d":0,"latency_ms_median":null,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"market":"BTC-PERP","notional":1000,"side":"BUY"},"type":"http"},"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"},"history":[],"description_full":"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.","last_updated":"2026-10-07T03:27:31.087Z","schemes":["exact"]}