ToolVet
75trust / 100

Stats

by Exact dice statistics in Other

x402 APIPassing, checked 2 h ago

Compute the exact probability distribution of a dice notation — mean, variance, standard deviation, min/max and the full probability mass function — with no sampling. Notations whose outcome range is too large for exact computation are clean 400s.

POST
https://dice.openverbs.com/v1/stats
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
574 ms
688 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

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

How to call it

POST https://dice.openverbs.com/v1/stats

Each call costs $0.002 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://dice.openverbs.com/v1/stats
content-type: application/json

{
  "distribution": false,
  "notation": "2d6"
}

Parameters

ParameterTypeRequiredDescription
distributionbooleanNoInclude the full probability mass function. Default true.
notationstringYesDice notation to analyse.

Example response

The listing has no example response.

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://dice.openverbs.com/v1/stats' \
  -H 'content-type: application/json' \
  --data-raw '{"distribution":false,"notation":"2d6"}'

# 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://dice.openverbs.com/v1/stats' \
  -H 'content-type: application/json' \
  --data-raw '{"distribution":false,"notation":"2d6"}' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fdice.openverbs.com%2Fv1%2Fstats&method=POST
const res = await pay("https://dice.openverbs.com/v1/stats", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "distribution": false,
    "notation": "2d6"
  }),
});
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://dice.openverbs.com/v1/stats",
        json={
            "distribution": False,
            "notation": "2d6",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402606 ms$0.002
7 h agoPassed402585 ms$0.002
12 h agoPassed402595 ms$0.002
18 h agoPassed402609 ms$0.002
23 h agoPassed402566 ms$0.002
Show 10 older checks
28 h agoPassed402603 ms$0.002
32 h agoPassed402539 ms$0.002
37 h agoPassed402583 ms$0.002
42 h agoPassed402559 ms$0.002
46 h agoPassed402610 ms$0.002
2 days agoPassed402554 ms$0.002
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3 days agoPassed402590 ms$0.002