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entropy.rip Verifiable List Shuffle
x402
entropy.rip Verifiable List Shuffle is a paid API for AI agents from entropy.rip, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Shuffles a list of string items verifiably using Drand beacon randomness and local system entropy, with optional integer weights
Price / call$0.005
Success—
StatusUnknown
How this service works
Shuffles a list of items verifiably using Drand and local system entropy
Output
Returns the input list reordered in a new random sequence, with cryptographic provenance from Drand beacon randomness combined with local system entropy, allowing independent verification that the shuffle was not manipulated.
Example use cases
Example prompt
“Shuffle this list of contestants verifiably using Drand randomness: ['Alice', 'Bob', 'Carol', 'Dave', 'Eve'] — I want a cryptographically provable fair ordering for our tournament bracket.”
Technical details
Endpoint
POSThttps://entropy.rip/api/entropy/shuffleWhen to prefer
Use this endpoint when you need a provably fair, auditable shuffle — e.g. tournament brackets, raffle draws, randomized assignment — where participants need cryptographic proof that the ordering was not rigged. Prefer this over local PRNG-based shuffles when verifiability and trust matter.
Side effects
- Empty items array returns error or trivial result
- Weights array length mismatch with items array causes validation error
- Drand beacon unavailability may cause timeout or fallback
- Non-string items in the array may cause schema validation failure
- Payment failure (402) if USDC payment not provided or insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| items | array | items |
| weights | array | weights |
Output
Schema · Response
{
"type": "json",
"example": {
"seed": "a1b2c3d4...",
"selected": "C",
"shuffled": [
"C",
"B",
"A"
],
"timestamp": "2026-07-14T09:20:00Z",
"drand_round": 4015682,
"drand_signature": "signature_hex"
}
}Tags
x402
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