# ManyLives Book Cover Size Calculator

> ManyLives Book Cover Size Calculator is a paid API for AI agents from api.manylives.me, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-19).

Calculates exact pixel dimensions and physical measurements for a print-on-demand book cover, including full wrap, spine width, and bleed zones, given trim size, page count, and paper type.

## Facts

- Endpoint: POST https://api.manylives.me/paid/text/book-cover-size?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/manylives-book-cover-size-calculator-621082be
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DGTlQmxBdgH9UlLNVwZHF

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 manylives-book-cover-size-calculator-621082be -d '<json body>'
```

Example prompt: Calculate the full-wrap cover dimensions for a paperback that's 6x9 inches, 240 pages, printed on standard color paper at 300 DPI — I need the pixel size, spine width in both inches and millimeters, and any bleed info.

## When to prefer this

Use this endpoint when you need precise, print-ready book cover dimensions — especially full wrap pixel sizes, spine widths, and bleed zones — for a given trim size, page count, and paper stock. It's ideal for AI agents helping authors or designers prepare artwork for print-on-demand platforms like KDP or IngramSpark. Prefer this over generic calculators when you need structured JSON output suitable for downstream automation or template generation.

## Known failure modes

- Invalid trim format (must be 'WxH' string or {width, height} object) returns an error
- Unrealistic page counts may produce warnings or problems in the response arrays
- Missing required fields (pages, trim) may result in errors or incorrect defaults
- DPI values outside typical print ranges may yield unexpected pixel dimensions

## How this service works

Pay-per-call tools for people building AI agents: live web search and page contents, point-in-time crypto market data and news for backtests (no lookahead), verifiable track records of 1,000 crypto strategies locked on the Base network, company profiles, quick AI and batch prices. Ask us to turn a public website into a JSON endpoint. Pay per call, no account, free trial.

## Output

Returns a JSON object with full wrap dimensions in pixels, inches, and millimeters; spine width in inches and millimeters; text-safe zone guidance for spine text; page-with-bleed dimensions; inside gutter margin minimums; and arrays of any detected problems or warnings based on the inputs.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "dpi": {
   "type": "string",
   "description": "optional, default 300"
  },
  "trim": {
   "type": "string",
   "examples": [
    "8.5x8.5"
   ],
   "description": "width x height in inches, e.g. \"8.5x8.5\" or {width, height}"
  },
  "pages": {
   "type": "string",
   "examples": [
    24
   ],
   "description": "interior page count"
  },
  "paper": {
   "type": "string",
   "examples": [
    "premium_color"
   ],
   "description": "bw_white (default), bw_cream, standard_color or premium_color"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "cover": {
   "full_wrap": {
    "px": {
     "width": 5192,
     "height": 2625
    },
    "width": {
     "in": 17.306,
     "mm": 439.6
    },
    "height": {
     "in": 8.75,
     "mm": 222.3
    }
   },
   "text_safe": {
    "spine": "not allowed; keep spine text at least 0.0625\" (1.6 mm) from each spine edge"
   },
   "spine_width": {
    "in": 0.056,
    "mm": 1.4
   }
  },
  "interior": {
   "page_with_bleed": {
    "width": {
     "in": 8.625,
     "mm": 219.1
    },
    "height": {
     "in": 8.75,
     "mm": 222.3
    }
   },
   "inside_gutter_margin_min": {
    "in": 0.375,
    "mm": 9.5
   }
  },
  "problems": [],
  "warnings": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/manylives-book-cover-size-calculator-621082be/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.manylives.me](https://www.zero.xyz/host/api.manylives.me/llms.txt)