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Extract Motion Characteristics from Web Element
Extract Motion Characteristics from Web Element is a paid API for AI agents from compilation-pixel-riders-subaru.trycloudflare.com, paid per call via x402, $0.2/call, status down (last checked 2026-09-14).
Visits a public URL in headless Chromium, scopes to a specified element, and extracts CSS animations, WAAPI entries, scroll-timeline params, GSAP/ScrollTrigger config, hover-state diffs, and motion tokens as a working reference with a drop-in code snippet.
Price / call$0.2
Success—
StatusDown
How this service works
Visits a URL in headless Chromium (multi-cohort optional), scopes to the requested element, and returns the captured MOTION CHARACTERISTICS: CSS @keyframes, WAAPI runtime entries, IntersectionObserver-driven reveals, scroll-timeline params, GSAP/ScrollTrigger config, cursor-tracking patterns, hover-state diffs, and the recurring duration/easing tokens that define the site's motion system. Includes scoped DOM HTML and computed CSS for structural reference. The drop-in `replicaHtml` snippet uses NEUTRAL PLACEHOLDER COPY — agents should substitute their own copy, brand, and visual identity. Verbatim timing/easing values are reproduced (functional properties); copy, logos, and proprietary imagery are NOT.
Output
Returns a structured object containing: captured motion data (ranked animations, duration/easing tokens, detected libraries, hover diffs, scroll-timeline params), scoped element outerHTML, computed styles, stylesheet sources, font metadata, asset list, and a drop-in code snippet in the requested framework using neutral placeholder copy. Optionally includes an interactive clone URL.
Example use cases
Example prompt
“Can you inspect the hero section on stripe.com — scoped to the `.hero-cta` button — and extract the motion characteristics like keyframes, easing values, and hover-state diffs, then give me a drop-in React TSX snippet I can adapt with my own copy?”
Technical details
Endpoint
POSThttps://compilation-pixel-riders-subaru.trycloudflare.com/v1/inspect-elementWhen to prefer
Use this endpoint when you need to extract specific motion characteristics (keyframes, easings, GSAP config, scroll triggers, hover diffs) from a scoped element on a public webpage and want a ready-to-adapt code snippet. Prefer this over the clone-site endpoint when you only need motion data for a single element rather than a full offline page bundle, and when you want framework-specific drop-in code output.
Side effects
- URL is behind authentication or a paywall — headless browser cannot access content, returns empty or partial capture
- CSS selector does not match any element — scope falls back to hero region or returns an error
- Site uses heavy obfuscation or anti-bot measures blocking headless Chromium
- JavaScript-heavy SPAs may not fully hydrate within the capture window, yielding incomplete animation data
- Cross-origin font or asset restrictions may prevent full asset inlining
- Very large pages may be truncated or time out
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| urlrequired | string | Public URL to inspect. |
| context | string | Free-form natural-language description of WHAT the user wants extracted ("just the dot-globe", "the nav with the dropdown hover", "the CTA button"). Used to refine the snippet output. |
| selector | string | Optional CSS selector to scope to a single element ("main > section:first-of-type", ".cta", "#hero"). Omit to inspect the whole hero region. |
| framework | string | Target framework for the drop-in snippet. |
| colorScheme | string | Force prefers-color-scheme during capture (sites often serve different designs by theme). |
| detectCohorts | boolean | Run a multi-fingerprint pass to surface A/B variants. |
| referenceScreenshot | string | Optional base64 PNG or https URL. Overrides probe-captured pixels — use when you know which cohort/state you want replicated. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| url | string | |
| fonts | array | |
| scope | string | The selector that was scoped to. |
| assets | array | |
| motion | object | Probe-captured motion data: rankedanimations, motion tokens, detected libraries, hover diffs. |
| caveats | array | |
| snippet | object | |
| capturedAt | string | |
| elementHtml | string | outerHTML of the scoped element after hydration. |
| stylesheets | array | |
| computedStyles | array | |
| interactiveCloneUrl | string | Optional URL to a hosted offline-running clone (when call also generated a clone bundle). |
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