{"uid":"cap_T4yBB8pyJUsjAd1l_hDD1","slug":"aiskills402-ui-worst-case-data-generator-1e545a81","name":"AISkills402: UI Worst-Case Data Generator","description":"UI Worst-Case Data — Turns the props of a UI component (a TypeScript type or a list of props) into strict JSON test data that stresses how it displays, and nothing else. Per prop it picks the worst values for the type, a string that is empty, one word of eighty characters with no space, on two lines, an emoji joined with a zero-width joiner, right-to-left letters or HTML-looking text, numbers at zero and at the large and decimal ends, lists that are empty, hold one item or hold a hundred, optio…","url":"https://api.aiskills402.com/v1/skills/ui-worst-case-data/file?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm__z0haw9F7OgN9M4EMt10b","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates stress-test JSON data for UI components by producing worst-case values for every prop in a given TypeScript type or prop list","exampleAgentPrompt":"Generate worst-case JSON test data for my React component that has these props: `label: string`, `items: string[]`, `count: number`, and `icon?: string` — I want to stress-test how it renders with empty strings, super-long words, RTL text, emoji, zero and huge numbers, and empty or hundred-item lists.","exampleUseCases":[{"title":"Stress-test a navigation menu component","prompt":"My nav component has a `title: string`, `links: Array<{label: string, href: string}>`, and `badgeCount?: number`. Can you generate worst-case JSON test data for it — I want to see how it handles a totally empty title, an 80-character word with no spaces, a hundred links, zero badge count, and an emoji in the label?"},{"title":"Edge-case data for a form input component","prompt":"I have a TypeScript type for a form field component: `{ placeholder: string; value: string; errorMessage?: string; maxLength: number }`. Generate all the worst-case JSON values for it — things like empty strings, really long single words, RTL characters, HTML-looking text, and the number extremes."},{"title":"QA fixture generation for a product card","prompt":"Can you create stress-test JSON fixtures for my product card UI component? It takes `{ title: string; description: string; tags: string[]; price: number; rating?: number }`. I need data that covers empty tags, one-hundred tags, a description with zero-width joiner emoji, right-to-left text in the title, and decimal/large price values."}],"resultDescription":"A JSON object containing worst-case test values for each prop in the provided UI component type. For string props: empty string, an 80-character word without spaces, a two-line string, an emoji with zero-width joiner, RTL text, and HTML-looking text. For number props: zero, a very large number, and a decimal. For array props: empty array, single-item array, and hundred-item array. For optional props: both present and absent variants. The output is structured to directly stress-test UI rendering edge cases.","failureModes":["Invalid or unparseable TypeScript type input may result in an error or incomplete output","Ambiguous prop types may produce generic rather than targeted worst-case values","Network or payment authorization failure returns HTTP 402 requiring x402 payment header","Very complex nested TypeScript generics may not be fully resolved"],"whenToPreferThis":"Use this endpoint when you need to systematically stress-test how a UI component renders under boundary and edge-case conditions — particularly for string overflow, bidirectional text, emoji rendering, empty states, and numeric extremes. Prefer it over manually crafting test fixtures when covering all prop types exhaustively. It is specifically designed for UI component props expressed as TypeScript types or prop lists, not for general data mocking or backend API testing.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:34:24.648Z","isFirstParty":false,"canonicalSlug":"aiskills402-ui-worst-case-data-generator-1e545a81"}