Color Contrast Checker

x402

Color Contrast Checker is a paid API for AI agents from x402-toolbox.shablony-pro.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-29).

Checks the contrast ratio between two colors and returns WCAG accessibility compliance results

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.

Output

Returns a JSON object with ok and paid flags, and likely includes the computed contrast ratio value and WCAG compliance levels (AA, AAA) for normal and large text sizes based on the provided color inputs.

Example use cases

Accessibility audit for button styling

“Does black text (#000000) on a yellow background (#FFD700) pass WCAG AA contrast requirements for normal-sized text?”

Brand color accessibility check

“I'm using #E63946 as my primary brand red for text on a white (#FFFFFF) background — does it meet WCAG accessibility standards?”

Dark mode UI validation

“Check the contrast ratio between my dark mode text color #D1D5DB and my background color #1F2937 — does it pass WCAG AA or AAA?”

Technical details

Endpoint

GEThttps://x402-toolbox.shablony-pro.workers.dev/util/color-contrast-checker?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a fast, deterministic, no-signup color contrast check payable per-call with USDC over Base. Ideal for AI agents doing automated accessibility audits or design validation workflows where spinning up an API key is impractical.

Side effects

Invalid or malformed color values in the schema parameter may return an error
Missing required color parameters may result in a failed computation
Non-hex color formats may not be supported
Payment failure via x402 will block access to the result

Input

Schema · Request body

Field	Type	Description
schema	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "paid": true
  }
}

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