FastX402 Lab

Calculates relative luminance and contrast ratio for two supplied colors, then reports WCAG AA and AAA pass or fail results. Use it to check text and background color combinations.

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://fastx402.tools/wcag-contrast", { method: "GET" });
console.log(await res.json());

https://fastx402.tools/wcag-contrast