Gemini CLI epa mcp server epa_echo_get_facility

How to: Gemini CLI epa mcp server epa_echo_get_facility

client:Gemini CLI transport:streamable-http tool:epa_echo_get_facility

Add epa mcp server to Gemini CLI

01
Open ~/.gemini/settings.json and merge this in. Keep any servers already there.

{
  "mcpServers": {
    "epa-mcp-server": {
      "httpUrl": "https://epa.caseyjhand.com/mcp"
    }
  }
}

02
Save the file and restart Gemini CLI.
03
Ask for something epa_echo_get_facility does. Gemini CLI lists the server's tools on connect and calls epa_echo_get_facility itself — you do not invoke it by name.
04
If nothing happens, check the server is running and that epa mcp server's identifier in your config matches the one above exactly.

Gemini expands $VAR and ${VAR} inside env values, so a secret can live in your shell rather than this file. Gemini CLI docs

Set these first

epa mcp server will not start until these are set, so epa_echo_get_facility never becomes available.

AIRNOW_API_KEY
EJSCREEN_API_BASE_URL
MCP_LOG_LEVEL

Same tool, other clients

This list was read from the server itself, by connecting to it and calling tools/list on 14 November 2026. It is what the server actually exposes, not what its listing claims.

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.

epa mcp server MCP server