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Grades & Study Calc – Percentile Rank
x402
Grades & Study Calc – Percentile Rank is a paid API for AI agents from grades-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Calculates the percentile rank of a score within a class list using the mean-rank method, returning rank from top, mean, median, z-score, and surrounding score counts.
Price / call$0.02
Success—
StatusUnknown
How this service works
Percentile rank of a score in a class list (mean-rank method), with rank from the top, mean, median and z-score.
Output
Returns a JSON object with the student's percentile rank (0–100), rank from the top of the class, number of scores above/below/equal to the given score, class size, mean, median, z-score, minimum, maximum, sample standard deviation, a summary verdict, and optional disclaimer or degraded-mode flags.
Example use cases
Student checking exam standing
“The class got these scores on the midterm: 45,52,60,63,67,70,72,75,78,80,83,85,88,92,95 — I got a 78. What percentile am I in, and what's the average and z-score?”
Teacher analyzing a student's performance
“I have a class of 10 students with scores 55,60,65,70,70,75,80,85,90,95 and one student scored 65. Can you calculate their percentile rank and tell me how many scored above and below them?”
Competitive student benchmarking grade
“My physics class scores were 40,50,55,60,65,70,75,78,80,82,85,88,91,93,97 and I scored 91. What percentile rank is that using the mean-rank method, and what's the class median?”
Technical details
Endpoint
GEThttps://grades-calc.x402tookit.com/percentile-rank?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a statistically grounded percentile rank using the mean-rank method alongside descriptive statistics (mean, median, z-score) for a single score within a known class list. It is ideal for academic grading contexts where the full class score distribution is available and you want more than just a raw rank — particularly when z-score and surrounding counts add context.
Side effects
- Fewer than 2 scores in the comma-separated list returns an error
- Non-numeric values in the scores string cause a parse failure
- More than 500 scores exceeds the class size limit
- yourScore not provided returns a validation error
- Network timeout or x402 payment failure prevents a result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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