Marketplace · API · x402

keyronne.com/api/color

Parse any CSS color (hex, rgb(), hsl()) and emit all three formats plus relative luminance. Compute WCAG contrast ratios against a background with AA/AAA pass-fail for normal and large text, and lighten, darken, or mix colors. Built for agents generating accessible UI themes. POST a JSON body like: {"color":"#3498db","background":"#ffffff"}

Endpoint	`https://keyronne.com/api/color`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~191 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0xB86F95EF5FA904318Ea9Df3b59AdCe099b478fC4
method	POST
last updated	2026-11-06T01:01:14.86Z

Use it

Call it (an x402 client pays automatically)

curl -i https://keyronne.com/api/color
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-5d9d1d7ed28d92f2

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}