MotionSpec — web animation accessibility MCP

Measured conclusion: Alive, not deep-tested. L2 outcome: not_attempted.

Web animation accessibility MCP: GSAP, static CSS checks, prefers-reduced-motion, WCAG 2.2.2/2.3.3.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "MotionSpec — web animation accessibility MCP": {
      "url": "https://api.motionspec.dev/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (5)

• motion_catalog read-only

  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.

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world no

• motion_validate read-only

  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.

  Parameters:

  • spec (required) — object — The MotionSpec JSON object

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world no

• motion_compile read-only

  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).

  Parameters:

  • spec — object — The MotionSpec JSON object
  • specName — string — Optional name used in the artifact header

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world no

• motion_audit read-only

  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).

  Parameters:

  • url — string — The page URL to audit (http/https).

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world no

• motion_stats read-only

  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.

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world no

Publisher website Repository

Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.