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Shipping & Logistics Calc – Unit Price Comparator
x402
Shipping & Logistics Calc – Unit Price Comparator is a paid API for AI agents from shipping-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-23).
Compares 2–20 products with mixed weight/volume/count units by normalizing to a common standard unit (per 100 g, 100 ml, or per item) and ranks them by price efficiency with savings percentages.
Price / call$0.02
Success—
StatusUnknown
How this service works
Compare package sizes by price per 100 g, 100 ml or per item across mixed units, ranked with savings.
Output
Returns a ranked array of all input items with their normalized price per standard unit, the best and worst value product names, the percentage savings between best and worst, a plain-language summary and verdict, optional reasons explaining the ranking, and a timestamp. May include a disclaimer and a list of items that could not be evaluated.
Example use cases
Grocery bulk-buy decision
“I'm buying olive oil and want to know which is best value: a 500 ml bottle for $6.99, a 1 liter bottle for $12.49, or a 3 liter tin for $31.99. Can you rank them by price per 100 ml and tell me the savings between the best and worst option?”
Mixed-unit supplement comparison
“Help me figure out which protein powder is cheapest per 100g — I've got a 2 lb tub for $29.99, a 5 lb tub for $64.99, and a 1 kg bag for $27.50.”
Retail product pricing audit
“I'm stocking a store and need to compare five cleaning spray SKUs with different fill volumes and prices to figure out which gives customers the best value per 100 ml — here are the items: 250 ml at $2.49, 500 ml at $4.29, 750 ml at $5.99, 1 l at $7.49, and 2 l at $13.99.”
Technical details
Endpoint
GEThttps://shipping-calc.x402tookit.com/unit-price?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to compare products that come in different package sizes or units and want a normalized, ranked view of cost efficiency. It is the right choice when quantities span weight, volume, and count units simultaneously and you want an instant best-value verdict rather than manual conversion. Prefer it over generic calculators when you need a ranked list with savings percentages and a human-readable summary.
Side effects
- Fewer than 2 or more than 20 items provided — validation error
- Unrecognized or unsupported unit string — item skipped or error returned
- Missing required fields (name, price, amount, unit) in any item object — parsing failure
- Malformed JSON in the items query parameter — 400 bad request
- Incompatible unit types mixed without a bridging standard unit (e.g. weight vs volume) — items may be flagged as notChecked
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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