ToolVet
78trust / 100

Radiation Decay

by Saylor Innovations Radioactive in Other

x402 APIPassing, checked 3 h ago

Radioactive decay calculator from initial amount, half-life and elapsed time - remaining amount and decay constant

GET
https://saylorinnovations.com/api/radiation/decay
Price
$0.01
per call in USDC
Uptime
100%
last 30 days
Response time
251 ms
1.6 s slowest 5%
Last check
Passed
3 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

How to call it

GET https://saylorinnovations.com/api/radiation/decay

Each call costs $0.01 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.

GET https://saylorinnovations.com/api/radiation/decay?elapsed=90&half_life=30&initial=100&unit=years

Parameters

ParameterTypeRequiredDescription
elapsedstringNorequired finite number greater than or equal to 0 (query)
half_lifestringNorequired finite number greater than 0 (query)
initialstringNorequired finite number greater than 0 (query)
unitstringNorequired unit label, 1-24 letters such as seconds, days, or years; use consistently (query)

Example response

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

{
  "decayed_amount": 87.5,
  "elapsed": 90,
  "half_life": 30,
  "half_lives_elapsed": 3,
  "initial_amount": 100,
  "remaining_amount": 12.5,
  "remaining_percent": 12.5,
  "scope_note": "Pure exponential-decay arithmetic only; not safety advice.",
  "unit": "years"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.01.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://saylorinnovations.com/api/radiation/decay?elapsed=90&half_life=30&initial=100&unit=years'

# 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 - 'https://saylorinnovations.com/api/radiation/decay?elapsed=90&half_life=30&initial=100&unit=years' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fsaylorinnovations.com%2Fapi%2Fradiation%2Fdecay
const res = await pay("https://saylorinnovations.com/api/radiation/decay?elapsed=90&half_life=30&initial=100&unit=years");
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://saylorinnovations.com/api/radiation/decay?elapsed=90&half_life=30&initial=100&unit=years")
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

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3 h agoPassed402766 ms$0.01
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21 h agoPassed402198 ms$0.01
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25 h agoPassed402196 ms$0.01
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