{"uid":"cap_d0sk_N59BNOFsirmZKK2x","slug":"color-contrast-checker-4c466cc4","name":"Color Contrast Checker","description":"309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.","url":"https://x402-toolbox.shablony-pro.workers.dev/util/color-contrast-checker?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"schema":{"type":"string"}}},"responseSchema":{"type":"json","example":{"ok":true,"paid":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_DMlFjrLoXXgZIpC47eWZb","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks the contrast ratio between two colors and returns WCAG accessibility compliance results","exampleAgentPrompt":"Can you check if white text (#FFFFFF) on a dark blue background (#003087) passes WCAG contrast requirements?","exampleUseCases":[{"title":"Accessibility audit for button styling","prompt":"Does black text (#000000) on a yellow background (#FFD700) pass WCAG AA contrast requirements for normal-sized text?"},{"title":"Brand color accessibility check","prompt":"I'm using #E63946 as my primary brand red for text on a white (#FFFFFF) background — does it meet WCAG accessibility standards?"},{"title":"Dark mode UI validation","prompt":"Check the contrast ratio between my dark mode text color #D1D5DB and my background color #1F2937 — does it pass WCAG AA or AAA?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T00:32:11.158Z","isFirstParty":false,"canonicalSlug":"color-contrast-checker-4c466cc4"}