Character Counter API

Count characters (grapheme clusters), characters without spaces, UTF-8 bytes, words and lines, plus X post weighted length, SMS encoding and segments, and common platform limits.

POST /api/v1/tools/character-counterMCP character_counterText & Writing

Count characters, bytes, words and lines, and check limits for X posts, Instagram captions and bios, LinkedIn, meta tags and SMS segments in GSM-7 or UCS-2.

Input

Send these as a JSON object. Unknown fields are rejected.

input: The text to count. (string, required)

Try it in the browser JSON Schema Get an API key

curl https://pithlab.com/api/v1/tools/character-counter \n  -H "Authorization: Bearer $PITHLAB_KEY" \n  -H "Content-Type: application/json" \n  -d '{"input":"Hello, world! 👋"}'

Example response

{
  "ok": true,
  "result": {
    "characters": 15,
    "withoutSpaces": 13,
    "bytes": 18,
    "words": 2,
    "lines": 1,
    "x": {
      "length": 16,
      "urls": 0,
      "limit": 280
    },
    "sms": {
      "encoding": "UCS-2",
      "units": 16,
      "segments": 1,
      "perSegment": 70,
      "remaining": 54,
      "nonGsm": [
        "👋"
      ]
    },
    "limits": [
      {
        "id": "x",
        "name": "X post",
        "limit": 280,
        "count": 16,
        "over": false
      },
      {
        "id": "instagram-caption",
        "name": "Instagram caption",
        "limit": 2200,
        "count": 15,
        "over": false
      },
      {
        "id": "instagram-bio",
        "name": "Instagram bio",
        "limit": 150,
        "count": 15,
        "over": false
      },
      {
        "id": "linkedin-post",
        "name": "LinkedIn post",
        "limit": 3000,
        "count": 15,
        "over": false
      },
      {
        "id": "meta-title",
        "name": "Meta title",
        "limit": 60,
        "count": 15,
        "over": false
      },
      {
        "id": "meta-description",
        "name": "Meta description",
        "limit": 160,
        "count": 15,
        "over": false
      }
    ]
  }
}