Border Radius Generator API
Visually craft CSS border-radius with per-corner sliders, live preview, unit toggle (px/em/rem/%), and shorthand collapsing.
Fast & Accurate
Get precise results instantly.
Easy Integration
Simple REST API with JSON response.
Developer Friendly
Clear docs and SDK examples.
Free to Start
5,000 free requests/month.
Endpoint
All requests should be made to the following endpoint:
POST https://api.tools.town/v1/design/border-radius Authentication
This endpoint requires an API Key. Include your API key in the request header.
Request Parameters
Send a POST request with JSON body.
| Parameter | Type | Required | Description | Example |
|---|---|---|---|---|
tl | number | ✕ | The tl parameter. | 100 |
tr | number | ✕ | The tr parameter. | 100 |
br | number | ✕ | The br parameter. | 100 |
bl | number | ✕ | The bl parameter. | 100 |
unit | enum | ✕ | The unit parameter. | px |
Example Request
curl -X POST "https://api.tools.town/v1/design/border-radius" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"tl": 100,
"tr": 100,
"br": 100,
"bl": 100,
"unit": "px"
}' Example Response 200 OK
{
"success": true,
"data": {
"longhand": "string",
"shorthand": "string",
"cssRule": "string"
}
} Error Codes
| Code | Meaning |
|---|---|
| 400 | Bad Request — missing or invalid parameter |
| 401 | Unauthorized — API key missing or invalid |
| 429 | Rate limit exceeded — free tier: 5,000 requests/month |
| 500 | Internal Server Error — try again or contact support |