# Grades & Study Calc – Weekly Study Hours Planner

> Grades & Study Calc – Weekly Study Hours Planner is a paid API for AI agents from grades-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).

Calculates weekly study hours from credit hours using the 2–3 hours per credit rule, returning total weekly workload and a daily study plan

## Facts

- Endpoint: GET https://grades-calc.x402tookit.com/study-time?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/grades-study-calc-weekly-study-hours-planner-54e9ec86
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tXwq7Qkui-7Af61cDvTVU

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability grades-study-calc-weekly-study-hours-planner-54e9ec86
```

Example prompt: I'm taking 16 credit hours this semester, all pretty tough courses, and I work 15 hours a week — can you calculate how many hours I should be studying each week and give me a daily study plan spread across 5 days?

## When to prefer this

Choose this endpoint when a student or academic planner needs a quick, rule-based estimate of weekly study time derived from credit hours, especially when also factoring in paid work hours and distributing the load across specific study days. It is more useful than a generic calculator when you need the structured daily breakdown and total workload context (including sleep headroom).

## Known failure modes

- Missing required creditHours parameter returns an error
- Non-numeric creditHours value causes a validation failure
- Extremely high credit hours (e.g. >30) may return a degraded or flagged result
- Network or service unavailability returns a non-200 response

## How this service works

Weekly study hours from credit hours using the 2 to 3 hours per credit rule, with total weekly workload and a daily plan.

## Output

Returns studyHoursPerWeek (weekly recommended study time), totalHoursPerWeek (study + job + approximate class time), studyHoursPerStudyDay (daily study target), classHoursPerWeekApprox, remainingHoursAfterSleep8h, along with a summary, disclaimer, and the hoursPerCredit multiplier used.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "creditHours"
     ],
     "properties": {
      "creditHours": {
       "type": "number",
       "description": "Credit hours you are taking this term (for example 15)"
      },
      "hoursPerCredit": {
       "type": "number",
       "description": "Study hours per credit hour per week: 2 (default), 3 for hard courses"
      },
      "jobHoursPerWeek": {
       "type": "number",
       "description": "Paid work hours a week, to show the total load"
      },
      "classDaysStudied": {
       "type": "integer",
       "description": "Days a week you will study (default 5)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "hoursPerCredit": {
       "type": [
        "null",
        "number"
       ]
      },
      "jobHoursPerWeek": {
       "type": [
        "null",
        "number"
       ]
      },
      "studyHoursPerWeek": {
       "type": [
        "null",
        "number"
       ]
      },
      "totalHoursPerWeek": {
       "type": [
        "null",
        "number"
       ]
      },
      "studyHoursPerStudyDay": {
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/grades-study-calc-weekly-study-hours-planner-54e9ec86/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from grades-calc.x402tookit.com](https://www.zero.xyz/host/grades-calc.x402tookit.com/llms.txt)