POPCORN Witness Verifier for Cursor

io.github.violetclaire/popcorn-tain-verifier

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

client:Cursor transport:streamable-http tools:1

Install POPCORN Witness Verifier in Cursor

~/.cursor/mcp.json · windows: %USERPROFILE%\.cursor\mcp.json

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

Use .cursor/mcp.json in a project root instead to scope it to that project. Cursor merges both. Cursor docs