MotionSpec — web animation accessibility MCP

Requires a Dev Key ($39/mo) or Agency plan ($249/mo) on the hosted endpoint (motionspec.dev/pricing?src=mcp). This unauthenticated call returns access information only; it does not compile code, fetch URLs, run an audit or read usage data. Arguments are optional and unused. Returns isError:true with structuredContent {ok:false, error:'PAYWALL', tool, upgrade} and text guidance. To use motion_audit on the hosted endpoint, connect with an x-motionspec-key header. Run the static URL audit locally for free with 'npx -p motionspec motion audit <url> --json' (MIT).

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 yourself and validate it with motion_validate (motion_compile runs in the CLI or with a key on the hosted endpoint). Free motion check: motionspec.dev/motion-check · keys for the hosted endpoint: motionspec.dev/pricing?src=mcp.

Requires a Dev Key ($39/mo) or Agency plan ($249/mo) on the hosted endpoint (motionspec.dev/pricing?src=mcp). This unauthenticated call returns access information only; it does not compile code, fetch URLs, run an audit or read usage data. Arguments are optional and unused. Returns isError:true with structuredContent {ok:false, error:'PAYWALL', tool, upgrade} and text guidance. To use motion_compile on the hosted endpoint, connect with an x-motionspec-key header. motion_compile runs locally for free with 'npx -p motionspec motion compile <spec.json>' (MIT).

Requires a Dev Key ($39/mo) or Agency plan ($249/mo) on the hosted endpoint (motionspec.dev/pricing?src=mcp). This unauthenticated call returns access information only; it does not compile code, fetch URLs, run an audit or read usage data. Arguments are optional and unused. Returns isError:true with structuredContent {ok:false, error:'PAYWALL', tool, upgrade} and text guidance. To use motion_stats on the hosted endpoint, connect with an x-motionspec-key header. Read local telemetry for free with 'npx -p motionspec motion stats' (MIT). This reads this machine's local activity, not hosted usage.

Checks a MotionSpec against the schema, the primitive allow-list, parameter bounds and injection rules. Fail-closed: returns ok=false with precise errors. Returns {ok, errors, warnings, deprecations, catalogVersion}. IMPORTANT: warnings[] carries the WCAG 2.2.2 / reduced-motion findings and can be non-empty while ok=true — a spec that compiles is not automatically accessible. Use to pre-check a spec before compiling.