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Slippage Calculator (Expected vs Actual Fill)
x402
Slippage Calculator (Expected vs Actual Fill) is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-29).
Calculates the slippage between an expected and actual trade fill, optionally checking against a tolerance threshold in basis points
Price / call$0.002
Success—
StatusUnknown
How this service works
Slippage between an expected and an actual fill — Genesis402 / UnyKorn Operator Network
Output
Returns a JSON object with an 'ok' boolean, the type identifier 'slippage-calc', and a receipt containing the on-chain transaction hash, USD amount charged, and a unique receipt ID, along with a generated_at ISO8601 timestamp. The core slippage result reflects whether the actual fill deviated from the expected fill within the specified tolerance.
Example use cases
DeFi swap slippage audit
“I just executed a swap — I expected to get 500 USDC but actually received 497.80 USDC. Can you calculate the slippage and tell me if it's within a 25 bps tolerance?”
Algo trading fill quality check
“My trading bot placed an order expecting a fill at 42100.00 and got filled at 42055.50. What's the slippage in basis points and does it exceed a 20 bps threshold?”
Pre-trade tolerance validation
“Before I confirm this trade, can you check if the difference between my quoted price of 3.4510 and the actual execution price of 3.4480 falls within a 15 bps slippage limit?”
Technical details
Endpoint
POSThttps://twin.unykorn.org/slippage-calc?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a lightweight, on-demand computation of trade fill slippage with optional basis-point tolerance checking, especially in automated trading pipelines, DeFi monitoring agents, or post-trade audit workflows. Prefer it over manual calculation when you need a receipt/audit trail of the slippage check with on-chain provenance.
Side effects
- Missing or invalid 'expected' or 'actual' values cause a 400-level error
- Non-numeric strings for expected/actual may result in a parse or validation error
- Negative toleranceBps (below minimum 0) will be rejected by schema validation
- Payment failure or insufficient USDC balance prevents the call from completing
- Network timeout or service unavailability returns a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| params | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"type": "slippage-calc",
"receipt": {
"tx_hash": "0x<64hex>",
"amount_usd": 0.25,
"receipt_id": "g402-<16hex>"
},
"generated_at": "<iso8601>"
}
}Tags
x402
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