Gemini CLI Parallax Protocol estimate_gas

How to: Gemini CLI Parallax Protocol estimate_gas

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

Add Parallax Protocol to Gemini CLI

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

{
  "mcpServers": {
    "parallax-mcp": {
      "httpUrl": "https://mcp.parallaxprotocol.org/mcp"
    }
  }
}

02
Save the file and restart Gemini CLI.
03
Ask for something estimate_gas does. Gemini CLI lists the server's tools on connect and calls estimate_gas itself — you do not invoke it by name.
04
If nothing happens, check the server is running and that Parallax Protocol'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

Parallax Protocol will not start until these are set, so estimate_gas never becomes available.

PARALLAX_MCP_RPC_URL
PARALLAX_MCP_GROUPS

Same tool, other clients

This list was read from the server itself, by connecting to it and calling tools/list on 13 October 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.

Parallax Protocol MCP server