FastBill MCP by usefulapi for Gemini CLI

io.usefulapi/fastbill

Read FastBill customers, invoices, estimates, expenses; create customers, invoices, projects.

client:Gemini CLI transport:streamable-http tools:22

Install FastBill MCP by usefulapi in Gemini CLI

~/.gemini/settings.json · windows: %USERPROFILE%\.gemini\settings.json

{
  "mcpServers": {
    "fastbill": {
      "httpUrl": "https://fastbill.usefulapi.io/mcp"
    }
  }
}

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