What does the Character Counter API do?

Count characters, letters, digits, whitespace, and punctuation. Use it when you need exact JSON instead of asking an LLM to recreate well-defined utility logic.

How much does one call to Character Counter cost?

1 credit per successful call. Failed calls (validation errors, 5xx) don't bill.

What parameters does the Character Counter API require?

Required fields: text. Full schema at /v1/openapi.json.

Is the Character Counter API deterministic?

Yes — same input, same output, forever. Tool version 2026-04-22; output shape is stable within a major version.

Can an AI agent call the Character Counter API?

Yes. Connect to https://api.miniwebtool.com/v1/mcp over the Model Context Protocol. The agent discovers `character-counter` with its JSON Schema automatically, so the model can plan while MiniWebtool handles the exact tool result.

What format does the API return?

JSON with a stable envelope: `{request_id, tool, tool_version, credits_used, result}`. Errors are RFC 7807 `application/problem+json`.

Character Counter API — MiniWebtool

Endpoint

POST https://api.miniwebtool.com/v1/tools/character-counter/run

Request body

Field	Type	Req.
`text`	`str`	✓

Cost & access

1 credit per successful call.
Max payload: 65536 bytes.
Privacy mode: hash_only
Available on: free, starter, pro, business, scale

Response envelope

{
  "request_id": "01K...",
  "tool": "character-counter",
  "tool_version": "2026-04-22",
  "credits_used": 1,
  "result": { ... }
}

Try it

Response

Response headers

Code examples

curl -X POST https://api.miniwebtool.com/v1/tools/character-counter/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"text":"Hello, World! \u4f60\u597d"}'

import requests

resp = requests.post(
    'https://api.miniwebtool.com/v1/tools/character-counter/run',
    headers={'Authorization': 'Bearer mwt_live_YOUR_KEY'},
    json={'text': 'Hello, World! 你好'},
)
resp.raise_for_status()
print(resp.json())

const resp = await fetch(
  'https://api.miniwebtool.com/v1/tools/character-counter/run',
  {
    method: 'POST',
    headers: {
      'Authorization': 'Bearer mwt_live_YOUR_KEY',
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({"text":"Hello, World! \u4f60\u597d"}),
  }
);
const data = await resp.json();
console.log(data);

<?php
$ch = curl_init('https://api.miniwebtool.com/v1/tools/character-counter/run');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => [
        'Authorization: Bearer mwt_live_YOUR_KEY',
        'Content-Type: application/json',
    ],
    CURLOPT_POSTFIELDS => json_encode([
    'text' => 'Hello, World! 你好'
]),
]);
$resp = curl_exec($ch);
curl_close($ch);
print_r(json_decode($resp, true));

require 'net/http'
require 'json'
require 'uri'

uri = URI('https://api.miniwebtool.com/v1/tools/character-counter/run')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = (uri.scheme == 'https')

req = Net::HTTP::Post.new(uri)
req['Authorization'] = 'Bearer mwt_live_YOUR_KEY'
req['Content-Type'] = 'application/json'
req.body = {
  'text' => 'Hello, World! 你好'
}.to_json

resp = http.request(req)
puts JSON.parse(resp.body).inspect

package main

import (
  "bytes"
  "encoding/json"
  "fmt"
  "io"
  "net/http"
)

func main() {
  body, _ := json.Marshal(map[string]interface{}{
    "text": "Hello, World! 你好",
  })
  req, _ := http.NewRequest("POST", "https://api.miniwebtool.com/v1/tools/character-counter/run", bytes.NewReader(body))
  req.Header.Set("Authorization", "Bearer mwt_live_YOUR_KEY")
  req.Header.Set("Content-Type", "application/json")

  resp, err := http.DefaultClient.Do(req)
  if err != nil { panic(err) }
  defer resp.Body.Close()
  out, _ := io.ReadAll(resp.Body)
  fmt.Println(string(out))
}

import java.net.URI;
import java.net.http.*;

var client = HttpClient.newHttpClient();
var req = HttpRequest.newBuilder()
    .uri(URI.create("https://api.miniwebtool.com/v1/tools/character-counter/run"))
    .header("Authorization", "Bearer mwt_live_YOUR_KEY")
    .header("Content-Type", "application/json")
    .POST(HttpRequest.BodyPublishers.ofString("{\"text\":\"Hello, World! \\u4f60\\u597d\"}"))
    .build();

var resp = client.send(req, HttpResponse.BodyHandlers.ofString());
System.out.println(resp.body());

Character Counter

Endpoint

Request body

Cost & access

Response envelope

Try it

Code examples

How to call Character Counter

Frequently asked

Use from an AI agent

Related text tools