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Documentation Index

Fetch the complete documentation index at: https://docs.codezero.io/llms.txt

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Model Context Protocol (MCP) servers can use cordon to make authenticated API calls without holding credentials directly.

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Node.js MCP servers

Node.js MCP servers can use cordon transparently by adding the bootstrap loader. In your MCP server config: 
{
  "mcpServers": {
    "my-server": {
      "command": "npx",
      "args": ["-y", "@some/mcp-server"],
      "env": {
        "NODE_OPTIONS": "--import @codezero-io/cordon/register"
      }
    }
  }
}
The @codezero-io/cordon/register import patches globalThis.fetch to inject a proxy dispatcher into all outbound requests, so Node’s fetch and fetch-based SDKs (Anthropic, OpenAI, etc.) respect the HTTPS_PROXY and HTTP_PROXY environment variables transparently.
The @codezero-io/cordon npm package must be installed in the project or globally for the register import to resolve.

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Python MCP servers

Python MCP servers using requests or httpx respect HTTPS_PROXY and HTTP_PROXY environment variables automatically. No additional configuration is needed — just ensure the env vars are set: 
{
  "mcpServers": {
    "my-python-server": {
      "command": "python",
      "args": ["-m", "my_mcp_server"],
      "env": {
        "HTTPS_PROXY": "http://127.0.0.1:6790",
        "HTTP_PROXY": "http://127.0.0.1:6790"
      }
    }
  }
}

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Other languages

Most HTTP clients in Go, Rust, and other languages respect the standard HTTPS_PROXY environment variable. Set it in the MCP server’s environment and ensure the CA certificate is trusted (via cordon trust).
Some languages require additional setup beyond setting environment variables. See the SDK Compatibility guide for a full compatibility matrix — notably Ruby’s net/http, Java’s java.net.http, and PHP’s curl_init() do not read proxy env vars by default.