For the complete documentation index, see llms.txt.

Find Longest Line API

text 1 credit / call v2026-04-22

Rank text lines by character, word, or byte length and return the longest lines.

One POST adds Find Longest Line to your app, site, workflow, or agent — formula, validation, edge cases, and docs already handled.

prefer a UI? Open the Find Longest Line on miniwebtool.com →

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

Endpoint

POST · 1cr
POST https://api.miniwebtool.com/v1/tools/find-longest-line/run

Request body

Field Type Req.
text str
count_mode
characters | characters_no_space | words | bytes
str
show_top
1 | 3 | 5 | 10 | all
str

Cost & access

  • 1 credit per successful call — failed calls refund.
  • Starts on: Free.
  • Max payload: 65536 bytes.
  • Privacy mode: no_body_logs
  • Available on: free, starter, pro, business, scale

Response envelope

{
  "request_id": "01K...",
  "tool": "find-longest-line",
  "tool_version": "2026-04-22",
  "credits_used": 1,
  "result": { ... }
}

Try it

Stored only in this browser tab. Playground test key is prefilled and only works on this page. Get a live key →
characters | characters_no_space | words | bytes
1 | 3 | 5 | 10 | all

Code examples

curl -X POST https://api.miniwebtool.com/v1/tools/find-longest-line/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"text":"short\nmuch longer line\nmid","count_mode":"characters","show_top":"3"}'
import requests

resp = requests.post(
    'https://api.miniwebtool.com/v1/tools/find-longest-line/run',
    headers={'Authorization': 'Bearer mwt_live_YOUR_KEY'},
    json={'text': 'short\nmuch longer line\nmid', 'count_mode': 'characters', 'show_top': '3'},
)
resp.raise_for_status()
print(resp.json())
const resp = await fetch(
  'https://api.miniwebtool.com/v1/tools/find-longest-line/run',
  {
    method: 'POST',
    headers: {
      'Authorization': 'Bearer mwt_live_YOUR_KEY',
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({"text":"short\nmuch longer line\nmid","count_mode":"characters","show_top":"3"}),
  }
);
const data = await resp.json();
console.log(data);
<?php
$ch = curl_init('https://api.miniwebtool.com/v1/tools/find-longest-line/run');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => [
        'Authorization: Bearer mwt_live_YOUR_KEY',
        'Content-Type: application/json',
    ],
    CURLOPT_POSTFIELDS => json_encode([
    'text' => 'short
much longer line
mid',
    'count_mode' => 'characters',
    'show_top' => '3'
]),
]);
$resp = curl_exec($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/find-longest-line/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' => 'short
much longer line
mid',
  'count_mode' => 'characters',
  'show_top' => '3'
}.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": "short
much longer line
mid",
    "count_mode": "characters",
    "show_top": "3",
  })
  req, _ := http.NewRequest("POST", "https://api.miniwebtool.com/v1/tools/find-longest-line/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/find-longest-line/run"))
    .header("Authorization", "Bearer mwt_live_YOUR_KEY")
    .header("Content-Type", "application/json")
    .POST(HttpRequest.BodyPublishers.ofString("{\"text\":\"short\\nmuch longer line\\nmid\",\"count_mode\":\"characters\",\"show_top\":\"3\"}"))
    .build();

var resp = client.send(req, HttpResponse.BodyHandlers.ofString());
System.out.println(resp.body());
how-to call find-longest-line
  1. Get an API key
    Get an API key. Sign up free for a bearer token. 1,000 credits/month, no card.
  2. Assemble the JSON body
    Required fields: text, . See the Request body table above for the full schema.
  3. POST to https://api.miniwebtool.com/v1/tools/find-longest-line/run
    Headers: Authorization: Bearer <key> and Content-Type: application/json. Copy-paste snippets in 7 languages are under Code examples.
  4. Parse the response
    Envelope: {request_id, tool, tool_version, credits_used, result}. The typed output lives in result.
faq frequently asked
What does the Find Longest Line API do?+

Rank text lines by character, word, or byte length and return the longest lines. Use it to add this utility without rebuilding formulas, validation, examples, and documentation.

How much does one call to Find Longest Line cost?+

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

What parameters does the Find Longest Line API require?+

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

Is the Find Longest Line 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 Find Longest Line API?+

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

mcp 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 (find-longest-line) 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=="find-longest-line")'
see-also related text tools