ToolVet
71trust / 100

Random

by Blackwood State Random in Onchain & crypto

x402 APIPassing, checked 3 h ago

Use when you need a random number generator, dice rolls, a coin flip, a uuid or random bytes that no one can predict. Do not use for verifiable on-chain randomness (VRF) or reproducible seeded sequences. Returns JSON with cryptographically secure random values: integers in a range, dice rolls, coin flips, UUIDs or hex bytes, from the Workers Web Crypto CSPRNG for 0.005 USDC per call. Typical response time 500 ms (p95). Category: Infrastructure.

POST
https://x402-gateway.blackwoodstate8.workers.dev/v1/random
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
961 ms
1.5 s slowest 5%
Last check
Passed
3 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://x402-gateway.blackwoodstate8.workers.dev/v1/random

Each call costs $0.005 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://x402-gateway.blackwoodstate8.workers.dev/v1/random
content-type: application/json

{
  "count": 2,
  "kind": "dice",
  "sides": 6
}

Parameters

ParameterTypeRequiredDescription
countintegerNoHow many values (1-100, default 1); ignored for bytes
kindstringYesinteger (count values between min and max), dice (count rolls of a die with sides faces), coin (count flips), uuid (count UUID v4) or bytes (length random bytes as hex) One of: integer, dice, coin, uuid, bytes.
lengthintegerNobytes: how many random bytes (1-256, default 32)
maxintegerNointeger: highest value, inclusive (default 100)
minintegerNointeger: lowest value, inclusive (default 1)
sidesintegerNodice: faces of the die (default 6)

Example response

The provider's example. We can't check it without paying.

{
  "generatedAt": "2026-10-17T16:48:06.750Z",
  "kind": "dice",
  "source": "crypto.getRandomValues (Cloudflare Workers CSPRNG)",
  "sum": 5,
  "values": [
    4,
    1
  ]
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://x402-gateway.blackwoodstate8.workers.dev/v1/random' \
  -H 'content-type: application/json' \
  --data-raw '{"count":2,"kind":"dice","sides":6}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://x402-gateway.blackwoodstate8.workers.dev/v1/random' \
  -H 'content-type: application/json' \
  --data-raw '{"count":2,"kind":"dice","sides":6}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fx402-gateway.blackwoodstate8.workers.dev%2Fv1%2Frandom&method=POST
const res = await pay("https://x402-gateway.blackwoodstate8.workers.dev/v1/random", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "count": 2,
    "kind": "dice",
    "sides": 6
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://x402-gateway.blackwoodstate8.workers.dev/v1/random",
        json={
            "count": 2,
            "kind": "dice",
            "sides": 6,
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
3 h agoPassed4021.5 s$0.005
9 h agoPassed402961 ms$0.005