# Paper & Print Calc – US Paper Sizes

> Paper & Print Calc – US Paper Sizes is a paid API for AI agents from paper-print-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).

Returns dimensions (inches, mm, points) and closest ISO equivalent for US and ANSI paper sizes like Letter, Legal, Tabloid, and Architectural sheets.

## Facts

- Endpoint: GET https://paper-print-calc.x402tookit.com/us-paper?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/paper-print-calc-us-paper-sizes-a5599e7f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_At5aEmEbgbGWvdvDu70RD

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 paper-print-calc-us-paper-sizes-a5599e7f
```

Example prompt: What are the dimensions of US Tabloid paper in inches, millimeters, and points, and what's the closest ISO size to it?

## When to prefer this

Use this endpoint when you need authoritative dimension data for US-standard paper sizes (Letter, Legal, Tabloid, ANSI A-E, Architectural A-E) in multiple unit systems simultaneously, especially when you also need the closest ISO equivalent for cross-standard compatibility. Prefer this over general search or ISO size endpoints when the input is a named US paper format.

## Known failure modes

- Missing or invalid 'name' query parameter returns an error
- Unrecognized paper size name outside the accepted enum list causes a failure
- Network or upstream service timeout

## How this service works

Letter, Legal, Tabloid, ANSI A-E and Architectural A-E paper sizes in inches, mm and points, with the closest ISO size.

## Output

Returns an object with the paper size name, width and height in inches, mm, and points, aspect ratio, area in square inches, and the closest matching ISO 216 size with its dimensions and mismatch in mm.

## 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": [
      "name"
     ],
     "properties": {
      "name": {
       "type": "string",
       "description": "One of: letter, legal, junior-legal, tabloid, ledger, executive, statement, government-letter, ansi-a, ansi-b, ansi-c, ansi-d, ansi-e, arch-a, arch-b, arch-c, arch-d, arch-e, arch-e1"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "name": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "widthMm": {
       "type": [
        "null",
        "number"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "heightMm": {
       "type": [
        "null",
        "number"
       ]
      },
      "closestIso": {
       "type": [
        "null",
        "object"
       ],
       "properties": {
        "name": {
         "type": [
          "null",
          "string"
         ]
        },
        "widthMm": {
         "type": [
          "null",
          "number"
         ]
        },
        "heightMm": {
         "type": [
          "null",
          "number"
         ]
        },
        "mismatchMm": {
         "type": [
          "null",
          "number"
         ]
        }
       }
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
      
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/paper-print-calc-us-paper-sizes-a5599e7f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from paper-print-calc.x402tookit.com](https://www.zero.xyz/host/paper-print-calc.x402tookit.com/llms.txt)