MotionLint runs on your own machine — the client starts it, so there is no endpoint to ping. 69 installs a week from npm. Last commit 27 Jul 2026.
Catch bad animations before they ship. Deterministic motion audit + vision-LLM design review.
We read the source, 5 d ago · rules 995398eba69f
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
postinstall: node -e "console.error('\n [motionlint] One more step: install Playwright Chromium so capture works:\n npx playwright install chromium\n')"
spawn(opener, [outPath], { detached: true, stdio: "ignore" }).unref();
const wrapped = new Function(`var __name = (f) => f; return (${src})();`) as () => DomSnapshot;
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add motionlint -- npx -y motionlint
{
"mcpServers": {
"motionlint": {
"command": "npx",
"args": [
"-y",
"motionlint"
]
}
}
}
[mcp_servers.motionlint]
command = "npx"
args = ["-y", "motionlint"]
{
"mcpServers": {
"motionlint": {
"command": "npx",
"args": [
"-y",
"motionlint"
]
}
}
}
{
"servers": {
"motionlint": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"motionlint"
]
}
}
}
Optional settings from the registry entry, left out of the block above:
ANTHROPIC_API_KEY (Anthropic API key for vision-LLM review. Optional — the deterministic audit needs no key, and Ollama, OpenAI or Google can be used instead), OPENAI_API_KEY (OpenAI API key for vision-LLM review. Optional), GOOGLE_API_KEY (Google API key for vision-LLM review. Optional), OPENAI_BASE_URL (Override the OpenAI base URL to target an OpenAI-compatible endpoint. Optional).
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Answers built from our own checks of this server.