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Penny Engine — Price Batch Profitability Analyzer
x402
Penny Engine — Price Batch Profitability Analyzer is a paid API for AI agents from penny-paid-batch-production.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-19).
Evaluates up to 50 pricing scenarios and returns profit estimates, identifying the highest-profit plan given price, cost, fees, ads, and shipping inputs.
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-to-machine result validation via x402. One structured call, deterministic PASS or FAIL and SHA-256 fingerprint, $0.001 USDC on Base.
Output
Returns a JSON object with the total count of evaluated scenarios, the currency (USD), a list of scenario results with estimated profit per scenario, a plain-language assumptions note, and a highlighted 'highestEstimatedProfit' object identifying the best-performing plan ID and its estimated profit in USD.
Example use cases
Ecommerce product launch pricing
“I'm launching a new gadget and have three price points in mind — $19.99, $24.99, and $29.99 — with a unit cost of $8, $2 shipping, $1.50 in ads, and a 12% platform fee. Which price gives me the best profit, and does any of them hit a 40% margin?”
Dropshipping margin comparison
“I'm dropshipping phone cases and want to compare selling at $15 vs $18 vs $20. My supplier cost is $5, shipping is $3.50, ads are $2, and marketplace fees are 15%. Run all three scenarios and tell me which one makes the most money.”
Fee and ad spend sensitivity check
“Same product at $35 price and $12 cost, but I want to see what happens to profit if my ad spend is $1, $3, or $5 while shipping stays at $2.50 and fees at 8%. Which ad budget leaves me the most profit?”
Technical details
Endpoint
POSThttps://penny-paid-batch-production.up.railway.app/api/price-batch?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to batch-compare multiple pricing configurations (up to 50) for profitability in a single call, especially in ecommerce or dropshipping contexts where price, cost, shipping, ads, and fee percentage all vary across scenarios. It is purpose-built for ranking plans by estimated profit and identifying the highest-margin option, making it more efficient than calling a single-scenario calculator repeatedly.
Side effects
- Missing required 'price' or 'cost' fields in any scenario returns a validation error
- Submitting more than 50 scenarios exceeds maxItems and is rejected
- Negative or non-numeric values for cost/price may produce unexpected results or errors
- Empty scenarios array (minItems:1 not met) returns a schema validation error
- Network or server errors on Railway deployment may return 5xx responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| scenarios | array | |
| targetMarginPct | number |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 2,
"currency": "USD",
"scenarios": [],
"assumptions": "Estimates from supplied data.",
"highestEstimatedProfit": {
"id": "plan-B",
"estimatedProfitUsd": 7.52
}
}
}Tags
x402
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