x402-catalog-history.ai-business-surface.workers.dev

Hex colour to RGB/HSL and WCAG contrast in one GET: pass a text colour and a background colour (3 or 6 hex digits) and get each as #rrggbb, RGB and HSL, the WCAG relative luminance, the contrast ratio and the four AA/AAA verdicts. curl: GET /color?hex=1a2b3c&against=ffffff (against defaults to ffffff). Response: {"foreground":{"hex":"#1a2b3c","rgb":{"r":26,"g":43,"b":60},"hsl":{"h":210,"s":39.5,"l

Open endpoint ↗

Price per call: $0.001
Chain: Base
Method: GET
Paid calls · 30 days: 0

Call it from code

This API is run by its own provider and paid directly through x402. We list it so you can find it; we don't route or hold the payment.

import { x402Client, wrapFetchWithPayment } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";

const client = new x402Client();
registerExactEvmScheme(client, { signer: agentAccount });

const pay = wrapFetchWithPayment(fetch, client);
const res = await pay("https://x402-catalog-history.ai-business-surface.workers.dev/color", { method: "GET" });
console.log(await res.json());

https://x402-catalog-history.ai-business-surface.workers.dev/color