ToolVet
80trust / 100

Effective Annual Rate

by Effective annual rate in Markets & finance

x402 APIPassing, checked 2 h ago

Convert a nominal annual rate (APR) compounded m times per year into the effective annual rate (EAR / APY): (1 + apr/m)^m - 1. Set continuous:true for e^apr - 1.

POST https://agent402.tools/api/effective-annual-rate

Last 30 days

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

Uptime
100%
Response time
263 ms typical, 350 ms slowest 5%
Last check
2 h ago
Next check
any minute now

How to call it

POST https://agent402.tools/api/effective-annual-rate

Each call costs $0.001 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://agent402.tools/api/effective-annual-rate
content-type: application/json

{
  "compoundingPerYear": 12,
  "nominalAnnualRate": 0.12
}

Parameters

ParameterTypeRequiredDescription
compoundingPerYearnumberNoCompounding periods per year. Default 12.
continuousbooleanNoIf true, use continuous compounding (e^apr - 1).
nominalAnnualRatenumberYesNominal annual rate / APR as decimal

Example response

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

{
  "compoundingPerYear": 12,
  "effectiveAnnualRate": 0.126825,
  "nominalAnnualRate": 0.12
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://agent402.tools/api/effective-annual-rate' \
  -H 'content-type: application/json' \
  --data-raw '{"compoundingPerYear":12,"nominalAnnualRate":0.12}'

# 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://agent402.tools/api/effective-annual-rate' \
  -H 'content-type: application/json' \
  --data-raw '{"compoundingPerYear":12,"nominalAnnualRate":0.12}' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent402.tools%2Fapi%2Feffective-annual-rate&method=POST
const res = await pay("https://agent402.tools/api/effective-annual-rate", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "compoundingPerYear": 12,
    "nominalAnnualRate": 0.12
  }),
});
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://agent402.tools/api/effective-annual-rate",
        json={
            "compoundingPerYear": 12,
            "nominalAnnualRate": 0.12,
        },
    )
    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
2 h agoPassed402196 ms$0.001
6 h agoPassed402337 ms$0.001
10 h agoPassed402187 ms$0.001
14 h agoPassed402244 ms$0.001
18 h agoPassed402350 ms$0.001
22 h agoPassed402897 ms$0.001
26 h agoPassed402268 ms$0.001
29 h agoPassed402199 ms$0.001
33 h agoPassed402331 ms$0.001
36 h agoPassed402270 ms$0.001
40 h agoPassed402318 ms$0.001
43 h agoPassed402263 ms$0.001
47 h agoPassed402248 ms$0.001
2 days agoPassed402266 ms$0.001
2 days agoPassed402343 ms$0.001