Discover / grades-calc.x402tookit.com

Grades & Study Calc

■ Challenge detected

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

Listed price
$0.02
Challenge detected
1 of the last check
Median response
210 ms
Last checked
21 Oct, 00:26 UTC
In our index since
21 Oct 2026

Endpoint

curl -i https://grades-calc.x402tookit.com/final-grade-needed
# 402 Payment Required: pay with an x402 client (USDC on Arbitrum),
# then send the same request again with the payment attached.
8 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://grades-calc.x402tookit.com

  • GET/final-grade-neededNo price listedScore needed on a final exam (or any remaining work) to reach a target class grade, from current grade and its weight.
  • GET/percentile-rankNo price listedPercentile rank of a score in a class list (mean-rank method), with rank from the top, mean, median and z-score.
  • GET/weighted-gradeNo price listedOverall class grade from categories or assignments with scores, maximums and weights, normalizing weights that do not total 100.
  • GET/study-timeNo price listedWeekly study hours from credit hours using the 2 to 3 hours per credit rule, with total weekly workload and a daily plan.
  • GET/grade-curveNo price listedCurve test scores by adding points, scaling so the top score is 100, or the square-root method, with before and after averages.
  • GET/percent-to-letterNo price listedLetter grade and 4.0 GPA points for a percentage on the common US scale, with plus/minus, and points to the next grade.
  • GET/reading-plannerNo price listedPages per day to finish a reading assignment by the due date, daily minutes at your pace, and a day-by-day page schedule.
  • GET/gpaNo price listedGPA on the 4.0 scale from letter grades and credits, with optional honors (+0.5) and AP/IB (+1.0) weighting.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 8 of 8 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/grades-calc.x402tookit.com

Recent checks

21 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.21 Oct 2026
All 1 checks
When (UTC)ResultHTTPResponse
21 Oct, 00:26 UTCChallenge detected402210ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 21 Oct, 00:26 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for Grades & Study Calc?

Its listed price is $0.02.

What payment terms does Grades & Study Calc advertise?

The listing advertises x402, Arbitrum, Base, Polygon, Solana and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is Grades & Study Calc listed?

In x402 Bazaar. Superstables first indexed it on 21 Oct 2026.

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