Line Counter

text 1 credits / call v2026-04-22

Count total / non-empty / empty lines and longest-line length.

Use this endpoint when your app or AI agent needs exact JSON instead of spending LLM tokens on well-defined utility work.

Prefer the browser version? Open the Line Counter on miniwebtool.com.

Start free — get a key → 1,000 credits · no card · 30 seconds

Endpoint

POST https://api.miniwebtool.com/v1/tools/line-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": "line-counter",
  "tool_version": "2026-04-22",
  "credits_used": 1,
  "result": { ... }
}

Try it

Stored only in this browser tab. Don't have one? Start free — get a key →

Code examples

curl -X POST https://api.miniwebtool.com/v1/tools/line-counter/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"text":"first line\nsecond line\n\nfourth"}'
import requests

resp = requests.post(
    'https://api.miniwebtool.com/v1/tools/line-counter/run',
    headers={'Authorization': 'Bearer mwt_live_YOUR_KEY'},
    json={'text': 'first line\nsecond line\n\nfourth'},
)
resp.raise_for_status()
print(resp.json())
const resp = await fetch(
  'https://api.miniwebtool.com/v1/tools/line-counter/run',
  {
    method: 'POST',
    headers: {
      'Authorization': 'Bearer mwt_live_YOUR_KEY',
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({"text":"first line\nsecond line\n\nfourth"}),
  }
);
const data = await resp.json();
console.log(data);
<?php
$ch = curl_init('https://api.miniwebtool.com/v1/tools/line-counter/run');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => [
        'Authorization: Bearer mwt_live_YOUR_KEY',
        'Content-Type: application/json',
    ],
    CURLOPT_POSTFIELDS => json_encode([
    'text' => 'first line
second line

fourth'
]),
]);
$resp = curl_exec($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/line-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' => 'first line
second line

fourth'
}.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": "first line
second line

fourth",
  })
  req, _ := http.NewRequest("POST", "https://api.miniwebtool.com/v1/tools/line-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/line-counter/run"))
    .header("Authorization", "Bearer mwt_live_YOUR_KEY")
    .header("Content-Type", "application/json")
    .POST(HttpRequest.BodyPublishers.ofString("{\"text\":\"first line\\nsecond line\\n\\nfourth\"}"))
    .build();

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

How to call Line Counter

  1. 1 Get an API key
    Get an API key. Sign up free for a bearer token. 1,000 credits/month, no card.
  2. 2 Assemble the JSON body
    Required fields: text. See the Request body table below for the full schema.
  3. 3 POST to https://api.miniwebtool.com/v1/tools/line-counter/run
    Headers: Authorization: Bearer <key> and Content-Type: application/json. Copy-paste snippets in 7 languages are under Code examples.
  4. 4 Parse the response
    Envelope: {request_id, tool, tool_version, credits_used, result}. The typed output lives in result.

Frequently asked

What does the Line Counter API do?

Count total / non-empty / empty lines and longest-line length. Use it when you need exact JSON instead of asking an LLM to recreate well-defined utility logic.

How much does one call to Line Counter cost?

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

What parameters does the Line Counter API require?

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

Is the Line 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 Line Counter API?

Yes. Connect to https://api.miniwebtool.com/v1/mcp over the Model Context Protocol. The agent discovers `line-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`.

Use from an AI agent

Every endpoint on this site is also exposed via the Model Context Protocol at https://api.miniwebtool.com/v1/mcp. Claude, Cursor, and any MCP-capable agent can discover this tool (line-counter) and its JSON Schema automatically — no client codegen.

# List tools the agent can call
curl -s https://api.miniwebtool.com/v1/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}' \
 | jq '.result.tools[] | select(.name=="line-counter")'

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