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Weighted Random Choice Selector
x402
Weighted Random Choice Selector is a paid API for AI agents from x402-zoo.lolagent.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Randomly selects one item from a caller-supplied list using provided probability weights, useful for routing, games, and simulations.
Price / call$0.001
Success—
StatusUnknown
How this service works
Choose among options using caller-supplied probability weights for routing, games and simulations.
Output
Returns the single selected item from the provided list, chosen according to the caller-supplied probability weights. The selection is non-deterministic across calls but statistically conforms to the given weights over many calls.
Example use cases
A/B test traffic routing
“Route this user to one of three variants — control, variant-A, or variant-B — with weights 60, 25, and 15 respectively, so control gets the majority of traffic.”
Weighted loot drop in a game
“I'm building a game loot system — randomly pick one item from [common, uncommon, rare, legendary] with probabilities [0.6, 0.25, 0.1, 0.05].”
Random daily challenge selector
“Pick today's challenge from [easy, medium, hard] where easy should come up 50% of the time, medium 35%, and hard 15%.”
Technical details
Endpoint
GEThttps://x402-zoo.lolagent.workers.dev/api/weighted-choiceWhen to prefer
Use this endpoint when you need a lightweight, stateless, pay-per-call weighted random selection without maintaining local randomization logic. Ideal for routing decisions, game mechanics, simulation steps, or any scenario where options have unequal probabilities and you want a remote, reproducible API call rather than client-side RNG.
Side effects
- Mismatched lengths between items and weights arrays returns an error
- Weights that don't sum to a valid distribution may cause undefined behavior
- Malformed query parameters (non-numeric weights, empty items list) return a 4xx error
- Network timeout or Cloudflare Worker cold start on rare occasions
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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