# Grades & Study Calc – Reading Planner

> Grades & Study Calc – Reading 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 pages per day, daily minutes, and a day-by-day page schedule to finish a reading assignment by its due date.

## Facts

- Endpoint: GET https://grades-calc.x402tookit.com/reading-planner?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-reading-planner-9b63038d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tfeB_yh0gUQOXYDjCUX9L

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-reading-planner-9b63038d
```

Example prompt: I have a 320-page textbook assignment due in 14 days, I've already read 40 pages, and I plan to take 2 rest days. My reading speed is about 20 pages per hour — give me a day-by-day reading schedule showing how many pages to read each day and how many minutes that'll take.

## When to prefer this

Choose this endpoint when a user needs to break a reading assignment into a structured daily plan with concrete page targets and time estimates. It is specifically suited for academic reading assignments with a fixed deadline, optional rest days, and a known or estimated reading speed. Prefer it over generic task planners when page-level scheduling and per-day minute estimates are needed.

## Known failure modes

- Missing required totalPages or days parameters returns an error
- days value outside 1–120 range rejected
- totalPages outside 1–5000 range rejected
- pagesAlreadyRead equal to or exceeding totalPages may produce zero or invalid schedule
- Non-integer values for integer fields may cause validation errors

## How this service works

Pages per day to finish a reading assignment by the due date, daily minutes at your pace, and a day-by-day page schedule.

## Output

Returns pages per day (and rounded-up variant), minutes per day, total hours remaining, percent already done, number of active reading days, rest days, and a full day-by-day schedule array where each entry shows the day number, pages to read that session, and the from/to page range.

## 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": [
      "totalPages",
      "days"
     ],
     "properties": {
      "days": {
       "type": "integer",
       "description": "Days you have left to read, 1 to 120"
      },
      "restDays": {
       "type": "integer",
       "description": "Days among those you will not read (default 0)"
      },
      "totalPages": {
       "type": "integer",
       "description": "Total pages in the assignment, 1 to 5000"
      },
      "pagesPerHour": {
       "type": "number",
       "description": "Your reading speed in pages per hour (default 30; novels 40 to 60, textbooks 15 to 25)"
      },
      "pagesAlreadyRead": {
       "type": "integer",
       "description": "Pages already done (default 0)"
      }
     }
    }
   },
   "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"
       ]
      },
      "restDays": {
       "type": [
        "null",
        "number"
       ]
      },
      "schedule": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "object",
        "properties": {
         "day": {
          "type": [
           "null",
           "number"
          ]
         },
         "pages": {
          "type": [
           "null",
           "number"
          ]
         },
         "toPage": {
          "type": [
           "null",
           "number"
          ]
    
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/grades-study-calc-reading-planner-9b63038d/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)