Vextorium Aleatorio — Cryptographically Secure Randomness API

x402

Vextorium Aleatorio — Cryptographically Secure Randomness API is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-16).

Generates verifiable random results (coin flip, dice roll, number in range, item selection, or list shuffle) optionally derived from the latest Ethereum block hash for on-chain verifiability.

Price / call$0.003

Seller volume →—

Success—

StatusUnknown

How this service works

Randomness for agents: flip coins, roll dice, draw numbers in a range, pick from a list or shuffle it. Cryptographically secure by default; with verificable=true it is derived from the latest finalized Ethereum block hash and your seed, so anyone can verify the result.

Output

Returns a JSON object containing: the randomness type used (tipo), an ISO 8601 timestamp (fecha), the result as an array of numbers or values (resultado), a boolean indicating if the result is verifiable (verificable), and a proof field (prueba) that is populated when verifiable=true, allowing anyone to re-derive the result from the Ethereum block hash and seed.

Example use cases

Verifiable on-chain lottery draw

“Pick 5 random numbers between 1 and 50 and make it verifiable using the Ethereum block hash so participants can independently confirm the draw was fair.”

Random item selector for giveaway

“I have a list of winners to choose from — can you randomly pick 3 names from this list: [Alice, Bob, Carol, Dave, Eve]? Make it cryptographically secure.”

Dice roll for tabletop game

“Roll 4 twenty-sided dice for my D&D session — I just need regular random results, no need for blockchain verification.”

Technical details

Endpoint

POSThttps://api.vextorium.com/aleatorio-pago?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need cryptographically secure randomness with optional on-chain verifiability via Ethereum block hash — ideal for trustless lotteries, provably fair games, or any scenario where third parties need to independently verify the random outcome. Prefer it over local PRNG when auditability matters, or when you need structured randomness types (coin, dice, range, pick, shuffle) without building your own logic.

Side effects

Invalid 'tipo' enum value — must be one of moneda, dado, numero, elegir, barajar
Missing required 'tipo' field in body
'opciones' array empty or missing when tipo=elegir or tipo=barajar
'maximo' less than 'minimo' when tipo=numero
Payment failure or insufficient USDC balance for x402 protocol
Ethereum block hash unavailable when verificable=true is requested

Input

Schema · Request body

Field	Type	Description
tipo	string
maximo	integer	Range max, or dice faces (default 6)
minimo	integer
semilla	string
cantidad	integer
opciones	array
verificable	boolean

Output

Schema · Response

{
  "type": "json",
  "example": {
    "tipo": "dado",
    "fecha": "2026-10-02T20:05:01+00:00",
    "prueba": null,
    "resultado": [
      2,
      6
    ],
    "verificable": false
  }
}

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