Developer API
ChanduSEOTool API Documentation
Use your API key to run SEO, image, PDF, and document tools from your own website, app, or automation workflow. Billing is applied only on successful tool requests. Account, usage, and catalog checks are free.
1. Copy API Key
Open your profile page, copy the API Key shown under API Access, and keep it private.
2. Send Bearer Token
Pass the key in the Authorization header with every API request.
3. Track Usage
Use the usage endpoint to check remaining credits and monthly request limits without spending credits.
Base URL and Authentication
Base URL: https://api.chanduseotool.com/api
cURL
curl -H "Authorization: Bearer YOUR_API_KEY" \
https://api.chanduseotool.com/api/v1/me/usageFree Account Endpoints
| Method | Endpoint | Purpose |
|---|---|---|
| GET | /v1/me/usage |
Check plan, quota, credits used, and remaining credits. This endpoint is non-billable. |
| GET | /v1/tools |
List available tools and their slugs. This endpoint is non-billable. |
| GET | /v1/jobs/{job} |
Check async job status. This endpoint is non-billable. |
Run a Tool
Tool requests use this endpoint format. Successful tool requests spend credits.
Endpoint
POST https://api.chanduseotool.com/api/v1/tools/{tool_slug}
cURL
curl -X POST "https://api.chanduseotool.com/api/v1/tools/word-counter" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"text":"ChanduSEOTool API is ready."}'Common Tool Examples
| Tool | Slug | Example Payload |
|---|---|---|
| Word Counter | word-counter |
{"text":"Your text here"} |
| Domain Authority Checker | domain-authority-checker |
{"url":"https://example.com"} |
| Background Remover | background-remover |
{"image_url":"https://example.com/photo.jpg"} |
| PDF to Word | pdf-to-word |
{"pdf_url":"https://example.com/file.pdf"} |
| Word to PDF | word-to-pdf |
{"file_url":"https://example.com/file.docx"} |
| PDF Compressor | pdf-compressor |
{"pdf_url":"https://example.com/file.pdf"} |
For file tools, you can usually send a public file URL or base64 content, depending on the tool. Use /v1/tools to confirm exact available slugs.
PHP Example
PHP cURL
<?php
$apiKey = 'YOUR_API_KEY';
$payload = ['text' => 'Your text here'];
$ch = curl_init('https://api.chanduseotool.com/api/v1/tools/word-counter');
curl_setopt_array($ch, [
CURLOPT_RETURNTRANSFER => true,
CURLOPT_POST => true,
CURLOPT_HTTPHEADER => [
'Authorization: Bearer ' . $apiKey,
'Content-Type: application/json',
],
CURLOPT_POSTFIELDS => json_encode($payload),
]);
$response = curl_exec($ch);
curl_close($ch);
$data = json_decode($response, true);
print_r($data);Laravel Example
Use this inside a Laravel controller, job, or service class.
Laravel HTTP Client
use Illuminate\Support\Facades\Http;
$apiKey = env('CHANDUSEOTOOL_API_KEY');
$response = Http::withToken($apiKey)
->acceptJson()
->post('https://api.chanduseotool.com/api/v1/tools/word-counter', [
'text' => 'Your text here',
]);
if ($response->successful()) {
$data = $response->json();
}
Add CHANDUSEOTOOL_API_KEY=your_key_here in your Laravel .env file and never expose it in frontend JavaScript.
JavaScript Example
Node.js / Server JavaScript
const response = await fetch('https://api.chanduseotool.com/api/v1/tools/word-counter', {
method: 'POST',
headers: {
'Authorization': 'Bearer YOUR_API_KEY',
'Content-Type': 'application/json'
},
body: JSON.stringify({ text: 'Your text here' })
});
const data = await response.json();
console.log(data);
Use this from your server, not directly in browser code, because browser code exposes your private API key.
WordPress Example
Add this as a small plugin or inside a private theme helper. It creates a shortcode: [cst_word_count text="Your text here"]
WordPress Shortcode
<?php
/*
Plugin Name: ChanduSEOTool API Example
*/
add_shortcode('cst_word_count', function ($atts) {
$atts = shortcode_atts([
'text' => 'Your text here',
], $atts);
$response = wp_remote_post('https://api.chanduseotool.com/api/v1/tools/word-counter', [
'headers' => [
'Authorization' => 'Bearer YOUR_API_KEY',
'Content-Type' => 'application/json',
],
'body' => wp_json_encode([
'text' => $atts['text'],
]),
'timeout' => 30,
]);
if (is_wp_error($response)) {
return 'API request failed.';
}
$data = json_decode(wp_remote_retrieve_body($response), true);
if (!($data['success'] ?? false)) {
return $data['error']['message'] ?? 'API error.';
}
return 'Words: ' . esc_html($data['data']['words'] ?? 0);
});Async Jobs
Large file tools may return a queued job. Save the request_id or status_url and check the job endpoint until it is completed.
cURL
curl -H "Authorization: Bearer YOUR_API_KEY" \
https://api.chanduseotool.com/api/v1/jobs/JOB_REQUEST_IDError Codes
| HTTP | Code | Meaning |
|---|---|---|
| 401 | invalid_api_key |
API key is missing, wrong, inactive, or regenerated. |
| 403 | tool_not_allowed |
Your plan does not include this tool. |
| 404 | tool_not_found |
Tool slug is not available. |
| 422 | validation_failed |
Required input is missing or invalid. |
| 429 | quota_exceeded |
Monthly API quota has been used. |
| 500 | processing_failed |
The tool request could not be processed. |
Credit Rules
- Profile refresh, usage checks, tools catalog, and job status checks do not spend credits.
- Successful tool requests spend credits according to the tool cost unit.
- Failed validation or unauthorized requests do not spend credits.
- If you regenerate your API key, update the new key in your website or application.
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