# Publishing Calc – Silent Reading Time

> Publishing Calc – Silent Reading Time is a paid API for AI agents from publishing-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).

Calculates the silent reading time for a given word count at a specified words-per-minute rate, returning results as minutes and as hours:minutes:seconds.

## Facts

- Endpoint: GET https://publishing-calc.x402tookit.com/reading-time?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/publishing-calc-silent-reading-time-26162ff2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2fNDhJJOeAPhvWOTsbWes

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 publishing-calc-silent-reading-time-26162ff2
```

Example prompt: How long will it take to silently read a 7,500-word article if I read at 250 words per minute? Give me the time in minutes and hours:minutes:seconds.

## When to prefer this

Use this endpoint when you need a fast, deterministic calculation of silent reading time from a word count, especially in publishing, content, or editorial workflows. It is purpose-built for books, articles, newsletters, and manuscripts — with a default WPM calibrated to adult non-fiction silent reading (238 WPM). Prefer it over general-purpose LLM estimates when you need consistent, reproducible reading-time figures.

## Known failure modes

- Missing required 'words' query parameter returns an error
- Non-numeric or negative word count may produce invalid results
- Extremely low or zero WPM values may cause division errors
- Network or payment (x402) failure prevents any response

## How this service works

Silent reading time for a word count at your words-per-minute (default 238), as minutes and hours:minutes:seconds.

## Output

Returns the word count used, words-per-minute rate applied, total reading time as a decimal minutes value, minutes rounded up to the nearest whole minute, and a formatted clock time string (H:MM:SS). Also includes a human-readable summary and optional disclaimer or degraded-service flags.

## 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": [
      "words"
     ],
     "properties": {
      "wpm": {
       "type": "number",
       "description": "Reading speed in words per minute (default 238, a silent-reading average for adult non-fiction)"
      },
      "words": {
       "type": "number",
       "description": "Word count of the text"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "hours": {
       "type": [
        "null",
        "number"
       ]
      },
      "words": {
       "type": [
        "null",
        "number"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "minutes": {
       "type": [
        "null",
        "number"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "clockTime": {
       "type": [
        "null",
        "string"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "minutesRoundedUp": {
       "type": [
        "null",
        "number"
       ]
      },
      "wordsPerMinuteUsed": {
       "type": [
        "null",
        "number"
       ]
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/publishing-calc-silent-reading-time-26162ff2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from publishing-calc.x402tookit.com](https://www.zero.xyz/host/publishing-calc.x402tookit.com/llms.txt)