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webperf-snippets.net

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Website
Tested JavaScript snippets that measure and debug web performance. Your AI agent runs them for you, or you run them yourself in DevTools: the same code every time.
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    page: Every page

    list_snippetsAnswer

    List the web performance snippets of this site, with the page and Markdown documentation of each one. Returns no code.

    View tool JSON
    {
  "name": "list_snippets",
  "kind": "answer",
  "impl": "imperative",
  "description": "List the web performance snippets of this site, with the page and Markdown documentation of each one. Returns no code.",
  "inputSchema": {
    "type": "object",
    "properties": {}
  },
  "page": "/"
}
    search_snippetsAnswer

    Search the web performance snippets by category and/or keyword in their ID, title or description. Returns no code.

    View tool JSON
    {
  "name": "search_snippets",
  "kind": "answer",
  "impl": "imperative",
  "description": "Search the web performance snippets by category and/or keyword in their ID, title or description. Returns no code.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "category": {
        "type": "string",
        "description": "Filter by category. One of: CoreWebVitals, Loading, Interaction, Media, Resources, DevTools-Overrides."
      },
      "query": {
        "type": "string",
        "description": "Keyword to look for in the ID, title or description."
      }
    }
  },
  "page": "/"
}
    get_snippetAnswer

    Get a snippet with its JavaScript code and the documentation of its page in Markdown: what it measures, the thresholds and how to read the result. The code runs in the browser console of the page to measure.

    View tool JSON
    {
  "name": "get_snippet",
  "kind": "answer",
  "impl": "imperative",
  "description": "Get a snippet with its JavaScript code and the documentation of its page in Markdown: what it measures, the thresholds and how to read the result. The code runs in the browser console of the page to measure.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "id": {
        "type": "string",
        "description": "Snippet ID, such as \"LCP\", \"INP\" or \"TTFB-Sub-Parts\". Use list_snippets or search_snippets to discover them."
      }
    },
    "required": [
      "id"
    ]
  },
  "page": "/"
}
    get_snippet_promptAnswer

    Get the instructions to run a snippet on any URL with the webperf-snippets CLI, which loads the page in headless Chromium, and to report the result. Pass the URL to measure, or the prompt asks for it.

    View tool JSON
    {
  "name": "get_snippet_prompt",
  "kind": "answer",
  "impl": "imperative",
  "description": "Get the instructions to run a snippet on any URL with the webperf-snippets CLI, which loads the page in headless Chromium, and to report the result. Pass the URL to measure, or the prompt asks for it.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "id": {
        "type": "string",
        "description": "Snippet ID, such as \"LCP\", \"INP\" or \"TTFB-Sub-Parts\". Use list_snippets or search_snippets to discover them."
      },
      "url": {
        "type": "string",
        "description": "URL of the page to measure."
      }
    },
    "required": [
      "id"
    ]
  },
  "page": "/"
}