Convert text to uppercase, lowercase, title, sentence, camel, snake, kebab, and related cases.
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 Text Case Converter on miniwebtool.com.
POST https://api.miniwebtool.com/v1/tools/lowercase-uppercase-letters/run
| Field | Type | Req. |
|---|---|---|
text
|
str |
✓ |
conversion
upper | lower | title | sentence | alternating | inverse | camel | pascal | snake | kebab | constant | dot
|
str |
— |
no_body_logs{
"request_id": "01K...",
"tool": "lowercase-uppercase-letters",
"tool_version": "2026-04-22",
"credits_used": 1,
"result": { ... }
}
curl -X POST https://api.miniwebtool.com/v1/tools/lowercase-uppercase-letters/run \
-H 'Authorization: Bearer mwt_live_YOUR_KEY' \
-H 'Content-Type: application/json' \
-d '{"text":"hello world from MiniWebtool","conversion":"kebab"}'
import requests
resp = requests.post(
'https://api.miniwebtool.com/v1/tools/lowercase-uppercase-letters/run',
headers={'Authorization': 'Bearer mwt_live_YOUR_KEY'},
json={'text': 'hello world from MiniWebtool', 'conversion': 'kebab'},
)
resp.raise_for_status()
print(resp.json())
const resp = await fetch(
'https://api.miniwebtool.com/v1/tools/lowercase-uppercase-letters/run',
{
method: 'POST',
headers: {
'Authorization': 'Bearer mwt_live_YOUR_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({"text":"hello world from MiniWebtool","conversion":"kebab"}),
}
);
const data = await resp.json();
console.log(data);
<?php
$ch = curl_init('https://api.miniwebtool.com/v1/tools/lowercase-uppercase-letters/run');
curl_setopt_array($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 from MiniWebtool',
'conversion' => 'kebab'
]),
]);
$resp = curl_exec($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/lowercase-uppercase-letters/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 from MiniWebtool',
'conversion' => 'kebab'
}.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 from MiniWebtool",
"conversion": "kebab",
})
req, _ := http.NewRequest("POST", "https://api.miniwebtool.com/v1/tools/lowercase-uppercase-letters/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/lowercase-uppercase-letters/run"))
.header("Authorization", "Bearer mwt_live_YOUR_KEY")
.header("Content-Type", "application/json")
.POST(HttpRequest.BodyPublishers.ofString("{\"text\":\"hello world from MiniWebtool\",\"conversion\":\"kebab\"}"))
.build();
var resp = client.send(req, HttpResponse.BodyHandlers.ofString());
System.out.println(resp.body());
text, . See the Request body table below for the full schema.
https://api.miniwebtool.com/v1/tools/lowercase-uppercase-letters/run
Authorization: Bearer <key> and Content-Type: application/json. Copy-paste snippets in 7 languages are under Code examples.
{request_id, tool, tool_version, credits_used, result}. The typed output lives in result.
Convert text to uppercase, lowercase, title, sentence, camel, snake, kebab, and related cases. Use it when you need exact JSON instead of asking an LLM to recreate well-defined utility logic.
1 credit per successful call. Failed calls (validation errors, 5xx) don't bill.
Required fields: text. Full schema at /v1/openapi.json.
Yes — same input, same output, forever. Tool version 2026-04-22; output shape is stable within a major version.
Yes. Connect to https://api.miniwebtool.com/v1/mcp over the Model Context Protocol. The agent discovers `lowercase-uppercase-letters` with its JSON Schema automatically, so the model can plan while MiniWebtool handles the exact tool result.
JSON with a stable envelope: `{request_id, tool, tool_version, credits_used, result}`. Errors are RFC 7807 `application/problem+json`.
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
(lowercase-uppercase-letters)
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=="lowercase-uppercase-letters")'