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Loot Expected-Value Calculator
x402
Loot Expected-Value Calculator is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-03).
Calculates the expected reward value from a loot table by combining item values with their drop probabilities.
Price / call$0.01
Success—
StatusUnknown
How this service works
Loot expected-value calculator: Calculate expected reward value from item values and drop probabilities.
Output
Returns the expected reward value — the probability-weighted average of all item values in the loot table, representing the average payout per loot roll.
Example use cases
Balancing RPG enemy loot drops
“I'm designing a dungeon boss with three possible drops: a common sword worth 15 gold at 65% chance, a rare staff worth 80 gold at 30% chance, and a legendary gem worth 500 gold at 5% chance. What's the expected gold value per kill?”
Evaluating gacha banner EV
“My gacha banner has items worth 50, 200, and 1000 currency with probabilities of 0.6, 0.35, and 0.05 respectively. Calculate the expected value so I can decide if it's worth pulling.”
Comparing two loot table designs
“For loot table A, items are worth 20, 50, and 150 with probabilities 0.8, 0.15, and 0.05. Can you compute the expected value so I can compare it against another design?”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/loot-expected-value?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, single-call computation of expected loot value from a discrete probability distribution — ideal for game designers balancing loot tables, analysts evaluating gacha systems, or agents automating game economy calculations without writing custom math code.
Side effects
- Mismatched array lengths between values and probabilities may return an error or incorrect result
- Probabilities that don't sum to 1.0 may produce misleading expected values
- Empty arrays may return zero or a validation error
- Non-numeric values in the arrays will likely cause a parsing error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| values | array | |
| probabilities | array |
Tags
x402
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