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mcp/harbor
VS Code

POPCORN MCP for VS Code

io.github.violetclaire/popcorn-mcp

Signed time and SHA-256 witness receipts for agents, with offline verification and x402 payment.

client:VS Code transport:stdio runtime:npm

Install POPCORN MCP in VS Code

.vscode/mcp.json 

{
  "inputs": [
    {
      "type": "promptString",
      "id": "evm-private-key",
      "description": "EVM_PRIVATE_KEY",
      "password": true
    }
  ],
  "servers": {
    "popcorn-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@violetclaire/popcorn-mcp"
      ],
      "env": {
        "EVM_PRIVATE_KEY": "${input:evm-private-key}"
      }
    }
  }
}

VS Code prompts for each input the first time the server starts, so no secret is written to the file. VS Code docs

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