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Tools.Town
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Border Radius Generator API

Visually craft CSS border-radius with per-corner sliders, live preview, unit toggle (px/em/rem/%), and shorthand collapsing.

Category: Design Endpoint: /v1/design/border-radius Method: POST Auth: API Key

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:

POSThttps://api.tools.town/v1/design/border-radius

Authentication

This endpoint requires an API Key. Include your API key in the request header.

Authorization: Bearer YOUR_API_KEY
You can get your API key from your dashboard.

Request Parameters

Send a POST request with JSON body.

ParameterTypeRequiredDescriptionExample
tlnumberThe tl parameter.100
trnumberThe tr parameter.100
brnumberThe br parameter.100
blnumberThe bl parameter.100
unitenumThe 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

application/json
{
  "success": true,
  "data": {
    "longhand": "string",
    "shorthand": "string",
    "cssRule": "string"
  }
}

Error Codes

CodeMeaning
400Bad Request — missing or invalid parameter
401Unauthorized — API key missing or invalid
429Rate limit exceeded — free tier: 5,000 requests/month
500Internal Server Error — try again or contact support