motionspec

The official MotionSpec server.

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What it can do

  • Motion Catalog: Returns the catalog of verified motion primitives (names, purpose, parameter schemas, defaults) plus the authoring rules for writing a MotionSpec. Call this FIRST, then write the spec
  • Motion Validate: Checks a MotionSpec against the schema, the primitive allow-list, parameter bounds and injection rules. Fail-closed: returns ok=false with precise errors. Use to pre-check a spec befo

What data it sees

Do you need an account

No: the server works without sign-in

The official MotionSpec server. Verifies and compiles the UI animation inside AI-generated web apps.

Two keyless tools. motion_catalog returns the 40 verified motion primitives with their parameter schemas, defaults and authoring rules — call it first, then write the spec. motion_validate checks a spec fail-closed against the schema, the primitive allow-list, parameter bounds and injection rules; it returns ok=false with precise errors instead of guessing. Nothing you submit is stored.

Every primitive ships a mandatory prefers-reduced-motion fallback, and the continuous ones carry a WCAG 2.2.2 (Pause, Stop, Hide) pause path. A validated spec compiles deterministically to on-budget GSAP or dependency-free WAAPI/CSS — same input, same bytes. MIT core on npm (motionspec). Docs and a free motion check for any URL: https://motionspec.dev

Not Motion.dev / Framer Motion, not the Android or iOS MotionSpec classes, not the usemotion.com calendar app, not a video generator.

Server tool list (2)

Raw names from tools/list. Only developers need these.

motion_catalogReturns the catalog of verified motion primitives (names, purpose, parameter schemas, defaults) plus the authoring rules for writing a MotionSpec. Call this FIRST, then write the spec yourself and pass it to motion_compile.
motion_validateChecks a MotionSpec against the schema, the primitive allow-list, parameter bounds and injection rules. Fail-closed: returns ok=false with precise errors. Use to pre-check a spec before compiling.