# Loot Drop Probability Calculator

> Loot Drop Probability 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 of obtaining at least one drop across a specified number of repeated attempts given a per-attempt drop chance.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/loot-drop-probability?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/loot-drop-probability-calculator-724c86e4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BkMMjchB7korGww-IEz8D

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability loot-drop-probability-calculator-724c86e4 -d '<json body>'
```

Example prompt: What's the probability of getting at least one loot drop if the per-attempt chance is 5% and I'm making 20 attempts?

## When to prefer this

Choose this endpoint when you need a quick, reliable probability computation for repeated independent Bernoulli trials in a game context — especially for loot drop, gacha, or farming mechanics. It's ideal for game designers tuning drop rates or players wanting to understand farming odds without running simulations.

## Known failure modes

- Missing or invalid attempts or chance_per_attempt values may return an error or default to schema defaults
- chance_per_attempt outside the 0–1 range may produce nonsensical results
- Very large attempt counts could produce floating-point precision edge cases
- Network or payment authorization failures return HTTP 402 or 5xx errors

## How this service works

Loot drop probability: Calculate the chance of at least one drop across repeated attempts.

## Output

Returns the probability (as a decimal or percentage) that at least one successful drop occurs across the given number of attempts, computed using standard cumulative probability formula (1 - (1 - p)^n).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "attempts": {
   "type": "number",
   "default": 20
  },
  "chance_per_attempt": {
   "type": "number",
   "default": 0.05
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/loot-drop-probability-calculator-724c86e4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)