POPCORN Witness Verifier for Gemini CLI

io.github.violetclaire/popcorn-tain-verifier

MCP server for verifying receipts: POPCORN-WITNESS/2.0 signature, digest, and time. Free, read only.

client:Gemini CLI transport:streamable-http tools:1

Install POPCORN Witness Verifier in Gemini CLI

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

{
  "mcpServers": {
    "popcorn-tain-verifier": {
      "httpUrl": "https://popcorn-tain-verify-mcp-v2.violetherod.workers.dev/mcp"
    }
  }
}

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