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Position PnL Calculator
x402
Position PnL Calculator is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Calculates realized profit/loss, ROI percentage, and break-even price for a trading position given entry/exit prices, size, side, leverage, and fee rates.
Price / call$0.003
Success—
StatusUnknown
How this service works
Realized PnL, ROI %, and break-even for a position from entry, exit, size, side, leverage and taker/maker fee rate.
Output
Returns the realized PnL in dollar terms, ROI as a percentage, and the break-even price at which the trade would have been neither profitable nor unprofitable, all accounting for the specified leverage and fee rates.
Example use cases
Crypto futures trade performance review
“I closed a long BTC futures trade — entered at $30,000, exited at $34,200, position size 1 BTC, 5x leverage, taker fee 0.04% and maker fee 0.02%. What's my realized PnL, ROI, and break-even price?”
Short position loss assessment
“I was short ETH from $2,100 and got stopped out at $2,350, size 10 ETH, 3x leverage, taker fee 0.06% both ways. How much did I lose and what was the break-even price I needed to hit?”
Leveraged trade profitability check before closing
“If I close my long position now — I entered at $0.85, current price is $1.10, size 5000 tokens, 20x leverage, 0.04% taker fee — what will my realized PnL and ROI be?”
Technical details
Endpoint
POSThttps://api.24klabs.ai/api/v1/position-pnl-calculatorWhen to prefer
Use this endpoint when you need a precise, fee-aware PnL calculation for a single closed or hypothetical position on any leveraged instrument — especially when taker/maker fee differentiation and leverage-adjusted ROI matter. Prefer this over manual calculations or generic spreadsheet formulas when integrating into an automated trading analysis or agent workflow.
Side effects
- Missing required fields (entry price, exit price, size, side, leverage) return a 400 validation error
- Invalid side value (not long/short) returns an error
- Zero or negative leverage causes a computation error
- Fee rates out of expected range may produce warnings or errors
- Insufficient USDC balance for the $0.003 per-call fee results in a payment failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| side | string | |
| size | number | |
| fee_rate | number | |
| leverage | number | |
| exit_price | number | |
| entry_price | number |
Output
Schema · Response
{
"type": "json",
"example": {
"net_pnl": 198.9,
"roi_pct": 98.9,
"gross_pnl": 200
}
}Tags
x402
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