Print book spine width in inches and mm from page count and paper type (white, c
Print book spine width in inches and mm from page count and paper type (white, cream, color) or your own thickness.
Answers HTTP 429 without x402 payment termsour last check, 2026-10-21
0 of 1checks answered this week
n/amedian answer time
$0.02listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://publishing-calc.x402tookit.com/spine-width
| Category | Everything else |
|---|---|
| Provider host | publishing-calc.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | no x402 terms | 429 | 710 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"pages": 300,
"paper": "white"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"pageThicknessIn": {
"description": "Override: inches of spine per page (use your printer's figure)",
"type": "number"
},
"pages": {
"description": "Total printed page count",
"type": "integer"
},
"paper": {
"description": "white (default), cream or color; per-page factors are common POD figures that vary by printer",
"type": "string"
}
},
"required": [
"pages"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"inchesPerPage": {
"type": [
"null",
"number"
]
},
"knownPapers": {
"properties": {
"color": {
"type": [
"null",
"number"
]
},
"cream": {
"type": [
"null",
"number"
]
},
"white": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"pages": {
"type": [
"null",
"number"
]
},
"paperUsed": {
"type": [
"null",
"string"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"spineWidthIn": {
"type": [
"null",
"number"
]
},
"spineWidthMm": {
"type": [
"null",
"number"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}