ToolVet
59trust / 100

Final Grade Needed

by Grades & Study Calc in Other

x402 APIPassing, checked 3 h ago

Score needed on a final exam (or any remaining work) to reach a target class grade, from current grade and its weight.

GET
https://grades-calc.x402tookit.com/final-grade-needed
Price
$0.02
per call in USDC
Uptime
56.3%
last 30 days
Response time
530 ms
765 ms slowest 5%
Last check
Passed
3 h ago, next in 3 h

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

GET https://grades-calc.x402tookit.com/final-grade-needed

Each call costs $0.02 in USDC on Polygon, 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://grades-calc.x402tookit.com/final-grade-needed?currentGrade=85&finalWeight=30&targetGrade=80

Parameters

ParameterTypeRequiredDescription
currentGradenumberYesYour current class grade in percent (for example 85)
finalWeightnumberYesWeight of the remaining work as a percent of the whole grade (for example 30)
targetGradenumberYesThe class grade you want, in percent (for example 90)

Example response

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

{
  "asOf": "2026-10-12T01:53:41.493Z",
  "currentGrade": 85,
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "gradeIfPerfect": 89.5,
  "gradeIfZero": 59.5,
  "notChecked": [
    "your teacher's rounding (some round 89.5 up to 90)",
    "dropped lowest scores, extra credit and grade replacement policies",
    "…1 more"
  ],
  "rawComputedScore": 68.333,
  "reachable": true,
  "reasons": [
    "Needed = (target - current x (1 - weight)) / weight."
  ],
  "remainingWeightPercent": 30,
  "scoreNeededPercent": 68.333,
  "source": "computed locally (weighted average solved for the last score)",
  "summary": "You need 68.33% on the remaining 30% to finish with 80%.",
  "targetGrade": 80,
  "targetLetter": "B-",
  "verdict": "COMPUTED"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://grades-calc.x402tookit.com/final-grade-needed?currentGrade=85&finalWeight=30&targetGrade=80'

# 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://grades-calc.x402tookit.com/final-grade-needed?currentGrade=85&finalWeight=30&targetGrade=80' \
  | 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fgrades-calc.x402tookit.com%2Ffinal-grade-needed
const res = await pay("https://grades-calc.x402tookit.com/final-grade-needed?currentGrade=85&finalWeight=30&targetGrade=80");
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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://grades-calc.x402tookit.com/final-grade-needed?currentGrade=85&finalWeight=30&targetGrade=80")
    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 agoPassed402540 ms$0.02
17 h agoPassed402589 ms$0.02
46 h agoExpected HTTP 402, got 530530109 ms-
3 days agoExpected HTTP 402, got 530530115 ms-
4 days agoExpected HTTP 402, got 530530104 ms-
Show 10 older checks
5 days agoExpected HTTP 402, got 530530108 ms-
5 days agoExpected HTTP 402, got 530530102 ms-
5 days agoExpected HTTP 402, got 530530233 ms-
5 days agoExpected HTTP 402, got 530530180 ms-
5 days agoPassed402521 ms$0.02
6 days agoPassed402530 ms$0.02
6 days agoPassed402765 ms$0.02
6 days agoPassed402531 ms$0.02
6 days agoPassed402489 ms$0.02
6 days agoPassed402495 ms$0.02