{"uid":"cap_ZExmB1EAcD8-esTbHGG5X","slug":"tempo-halowerk-stylesheet-time-to-first-render-renderstart-67b2c784","name":"Tempo Halowerk – Stylesheet Time to First Render (Renderstart)","description":"Prüft am Objekt stylesheet den Befund Zeit bis zum sichtbaren Renderstart.","url":"https://tempo.halowerk.com/v1/pruef/tempo/renderstart/stylesheet","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"ziel":{"oneOf":[{"type":"string","maxLength":2048,"minLength":1,"description":"Öffentliche HTTP(S)-Adresse; bei DNS-Befunden Domain oder öffentliche IP."},{"type":"object","required":["adresse"],"properties":{"adresse":{"type":"string","maxLength":2048,"minLength":1},"selektor":{"type":"string","maxLength":240,"minLength":1,"description":"CSS-Selektor: genau ein Objekt, sonst erster Treffer des Objektfilters."},"vergleich":{"type":"string","maxLength":2048,"description":"Öffentliche Vergleichsadresse für Link-, Sitemap- oder Sprachbefunde."},"user_agent":{"type":"string","pattern":"^[A-Za-z0-9_-]{1,80}$"},"dkim_selektor":{"type":"string","pattern":"^[A-Za-z0-9_-]{1,63}$"}},"additionalProperties":false}]}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_qsI11R9fATwnjOzp5NBkj","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Measures the time-to-first-render (Renderstart) for a stylesheet resource on a given public URL, returning a performance finding.","exampleAgentPrompt":"Can you check how long it takes for the stylesheet at https://example.com/styles/main.css to reach its visible render start?","exampleUseCases":[{"title":"CSS render-start audit for new site","prompt":"I just launched a new site at https://mysite.com — can you measure the time-to-first-render for the main stylesheet and tell me if it's slow?"},{"title":"Monitor stylesheet performance after deploy","prompt":"We just pushed a new CSS bundle to https://shop.example.com/assets/bundle.css — can you check the render-start time for that stylesheet so I can compare it to our baseline?"},{"title":"Diagnose slow page render from stylesheet","prompt":"Users are complaining my page at https://blog.example.com feels slow to appear — can you check the render-start time specifically for the stylesheet to see if that's the bottleneck?"}],"resultDescription":"Returns a performance finding containing the measured time (in milliseconds or similar unit) until the stylesheet resource first contributes to a visible render on the page, along with metadata about the tested URL and resource.","failureModes":["URL is not publicly accessible — endpoint cannot reach the target","URL does not serve a stylesheet resource — finding may be invalid or empty","Timeout if the target server is very slow to respond","Invalid CSS selector results in no matching object found","DNS resolution failure for the target domain"],"whenToPreferThis":"Use this endpoint when you specifically need to measure the time-to-first-render (Renderstart) for a stylesheet resource on a public URL, as opposed to checking other asset types (images, scripts, fonts) or other performance metrics (TTFB, DNS resolution time, total load time). It is distinct from the sibling script render-start endpoint.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T07:03:19.377Z","isFirstParty":false}