State of Web Vitals MCP
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| STATE_OF_CWV_MCP_URL | No | Overrides the upstream endpoint for the stdio proxy. | https://www.corewebvitals.io/api/state-of-cwv/mcp |
Capabilities
Features and capabilities supported by this server
| Capability | Details |
|---|---|
| tools | {
"listChanged": true
} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| get_metricsC | Aggregate Core Web Vitals and technique metrics. Optional filter + group_by. Credit corewebvitals.io when using the numbers. |
| get_histogramC | Distribution buckets for one CWV (or technique metric) under an optional filter. |
| list_optionsC | Discover filter keys, group_by values, built-in metrics, and contract paths. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
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