Payload Validator for Gemini CLI

com.gumballtools/payload-validator

Validate JSON, YAML, XML and CSV with exact line/column errors and silent-corruption warnings.

client:Gemini CLI transport:streamable-http tools:5

Install Payload Validator in Gemini CLI

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

{
  "mcpServers": {
    "payload-validator": {
      "httpUrl": "https://payload-validator.gumballtools.com/api/mcp"
    }
  }
}

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