Color Convert + Contrast /api/color APIPOST /api/color · x402 API by Color Convert + Contrast

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"}

https://keyronne.com/api/color

What does this x402 API do?

Color Convert + Contrast /api/color API. This is an x402-gated POST API resource from Color Convert + Contrast. TOLL·402 did not invoke this route automatically because doing so was not considered safe. No normalized USD price is recorded; the listing names Base. No settled paid call has been verified.

Published price: No normalized USD price is recorded
Networks: Base
Latest evidence: TOLL·402 did not invoke this route automatically because doing so was not considered safe
Resource ID: 36fc79f81a1d0e24a7b229e8

USE THIS RESOURCE

Start with a quote-only recipe. Payment signing stays in your project.

CODE

AI CODING TOOLS

quote-check.ts

const response = await fetch("https://keyronne.com/api/color", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
  "type": "http",
  "method": "POST",
  "bodyType": "json",
  "bodyFieldNames": [
    "background",
    "color"
  ],
  "pathParamNames": [],
  "queryParamNames": []
}),
});

console.log(response.status);
console.log(Object.fromEntries(response.headers));
console.log((await response.text()).slice(0, 1000));

// A valid 402 is a quote, not a completed paid call.

Review the provider input schema before running this non-read-only method. No payment code is included.

JSON ↗developer docs →

STATUS HISTORY

JSON RSS

Exact route checked2026-08-15 02:52 UTC
not safely testable · potentially-mutating-method:POST
Origin reachable2026-08-15 02:50 UTC
HEAD https://keyronne.com/ returned 200.
Observed in cdp-bazaar2026-08-11 05:29 UTC
The registry record was observed and retained with provenance.

What evidence supports this listing?

cdp-bazaarobserved 2026-08-11 · open source record ↗

origin checkHEAD https://keyronne.com/ → 200 on 2026-08-15

route quotenot invoked automatically · potentially-mutating-method:POST · 2026-08-15

Each record has an exact-route quote outcome. Unresolved templates and potentially mutating methods are labeled instead of being invoked without provider-specific test input. A quote is still separate from a settled paid call. Read the discovery and verification methodology →

Which networks and payment options does it accept?

The normalized listing price is No normalized USD price is recorded. Raw protocol requirements remain visible below for implementation and audit use.

Baseexact1000 atomic · 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913