state-of-cwv

endpoint

https://www.corewebvitals.io/api/state-of-cwv/mcp

protocol

streamable-http ·2025-03-26

authentication

none observed

public key

none — nobody has proven they own this listing · is it yours? claim it

karma

0 · newcomer

Is state-of-cwv live?

Yes — it answered the hub's last check (checked 12m ago). It answered 100% of checks over the last 30 days.

Is state-of-cwv free to use?

Yes — the hub reached it with no key and no payment.

What tools does state-of-cwv have?

3 tools: get_histogram, get_metrics, list_options.

Is state-of-cwv safe to connect?

The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

• get_metrics reads open 9h ago

  What are the numbers? Aggregate Core Web Vitals and/or technique metrics across sites, with optional filter and group_by. Responses include attribution — credit corewebvitals.io when you use the numbers. Metrics (comma-separated or array): - CWV: lcp, inp, cls, fcp, ttfb — good/needs_improvement/poor share + p50/p75 + sample n - good_all3 — share of sites that pass LCP+INP+CLS together - good_all3_plus_ttfb — pass all three plus TTFB - Contract paths: images.loading, stack.framework, scripts.origin, headers.has_etag, synthetic.tbt_ms, … Filter (optional AND): device, cms, framework, cdn, provider. Omit = all sites in the snapshot. Group_by (optional): cms | frameworks | cdn | analytics | tag_managers | … → one row per entity. Without group_by: one aggregate; set metrics return top categories.

  mcp-tool

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  {
    "type": "object",
    "properties": {
      "focus": {
        "enum": [
          "lcp",
          "inp",
          "cls",
          "fcp",
          "ttfb"
        ],
        "type": "string",
        "description": "CWV used when correlating technique metrics. Default: lcp."
      },
      "limit": {
        "type": "integer",
        "description": "Max groups or top categories. Default: 25, max: 100."
      },
      "filter": {
        "type": "object",
        "properties": {
          "cdn": {
            "type": "string",
            "description": "Only sites on this CDN key (cloudflare, origin, …)."
          },
          "cms": {
            "type": "string",
            "description": "Only sites on this CMS key (wordpress, shopify, wix, …)."
          },
          "device": {
            "enum": [
              "all",
              "phone",
              "desktop"
            ],
            "type": "string",
            "description": "CrUX device slice. Default: all."
          },
          "provider": {
            "type": "string",
            "description": "Only sites that load this third-party provider key (google_analytics_4, …)."
          },
          "framework": {
            "type": "string",
            "description": "Only sites that include this JS framework key (react, vue, jquery, …)."
          }
        },
        "description": "AND filters. Omit for all sites in the dataset. Keys: device (all|phone|desktop), cms, framework, cdn, provider (key), provider_category (e.g. analytics — use with provider or alone is not enough; prefer group_by for rankings).",
        "additionalProperties": false
      },
      "metrics": {
        "description": "Metrics to return. Default: lcp,inp,cls,ttfb,good_all3. String (comma-separated) or array of strings."
      },
      "group_by": {
        "type": "string",
        "description": "Break results down by this dimension: cms, frameworks, cdn, or a provider category (analytics, tag_managers, …). Omit for a single aggregate."
      },
      "min_sites": {
        "type": "integer",
        "description": "When group_by is set, drop groups with fewer sites. Default: 50."
      }
    }
  }

  arguments 63 lines copy
• list_options reads open 9h ago

  Discover what you can pass to get_metrics / get_histogram: filter keys, group_by values, built-in metrics, and contract metric paths (optional kind filter). Call this when unsure of a key or path.

  mcp-tool

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  {
    "type": "object",
    "properties": {
      "kind": {
        "type": "string",
        "description": "Optional contract kind: scalar, boolean, categorical, set, weighted_set, measures."
      },
      "include_paths": {
        "type": "boolean",
        "description": "Include full contract path list. Default true."
      }
    }
  }

  arguments 13 lines copy
• get_histogram reads unknown 9h ago

  What is the shape of one metric? Returns histogram buckets (count + share) plus summary stats. Metric: one of lcp, inp, cls, fcp, ttfb (field CWV), or a scalar technique path when available. Filter: same as get_metrics (device, cms, framework, cdn, provider). No group_by — call get_metrics with group_by to compare segments, then get_histogram per segment if needed.

  mcp-tool

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  {
    "type": "object",
    "required": [
      "metric"
    ],
    "properties": {
      "filter": {
        "type": "object",
        "properties": {
          "cdn": {
            "type": "string",
            "description": "Only sites on this CDN key (cloudflare, origin, …)."
          },
          "cms": {
            "type": "string",
            "description": "Only sites on this CMS key (wordpress, shopify, wix, …)."
          },
          "device": {
            "enum": [
              "all",
              "phone",
              "desktop"
            ],
            "type": "string",
            "description": "CrUX device slice. Default: all."
          },
          "provider": {
            "type": "string",
            "description": "Only sites that load this third-party provider key (google_analytics_4, …)."
          },
          "framework": {
            "type": "string",
            "description": "Only sites that include this JS framework key (react, vue, jquery, …)."
          }
        },
        "description": "AND filters. Omit for all sites in the dataset. Keys: device (all|phone|desktop), cms, framework, cdn, provider (key), provider_category (e.g. analytics — use with provider or alone is not enough; prefer group_by for rankings).",
        "additionalProperties": false
      },
      "metric": {
        "type": "string",
        "description": "lcp | inp | cls | fcp | ttfb, or a contract scalar path."
      }
    }
  }

  arguments 44 lines copy

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0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.