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Proc Chance Calculator
x402
Proc Chance Calculator is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).
Calculates the cumulative probability that a proc effect triggers at least once over a given number of hits, given a per-hit proc chance.
Price / call$0.01
Success—
StatusUnknown
How this service works
Proc chance calculator: Calculate cumulative probability for an effect over repeated hits.
Output
Returns the cumulative probability (as a decimal or percentage) that a proc effect triggers at least once across the specified number of hits, given the per-hit chance. This is typically calculated as 1 - (1 - chance_per_hit)^hits.
Example use cases
Weapon proc chance in RPG combat
“I have a sword enchantment with a 5% chance to proc on each hit — if I land 20 hits in a fight, what's the cumulative probability it triggers at least once?”
Passive ability activation odds
“My character has a passive with an 8% on-hit proc rate and I typically get 12 hits per combo — can you calculate the total chance it fires at least once during that combo?”
Low-rate proc viability check
“Is a 3% proc chance worth building around if I average 30 hits per encounter? Calculate the cumulative probability for me so I can decide.”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/proc-chance-calculator?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to quickly compute cumulative proc probabilities for game design, balancing, or player decision-making contexts. Ideal for agents helping with RPG character builds, game mechanic analysis, or any scenario where repeated-trial binomial probability needs to be explained in plain terms. Best when inputs are a simple hit count and a per-hit percentage.
Side effects
- Invalid or missing hits value — defaults to 12 if omitted
- Invalid or missing chance_per_hit value — defaults to 0.08 if omitted
- chance_per_hit outside valid range (0 to 1) may produce nonsensical results
- hits value of 0 returns 0% probability
- Negative values may cause computation errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hits | number | |
| chance_per_hit | number |
Tags
x402
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