OPA MCP Server

What the code does

We read the source, 1 d ago · rules 995398eba69f

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

    ((await exists('/.dockerenv')) || (await exists('/run/.containerenv')))

    const child = spawn(binary, opts.args, {

      const isPresent = model.eval(presence, true).toString() === 'true';

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Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add opa-mcp -- npx -y @orygn/opa-mcp

{
  "mcpServers": {
    "opa-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@orygn/opa-mcp"
      ]
    }
  }
}

[mcp_servers.opa-mcp]
command = "npx"
args = ["-y", "@orygn/opa-mcp"]

{
  "mcpServers": {
    "opa-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@orygn/opa-mcp"
      ]
    }
  }
}

{
  "servers": {
    "opa-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@orygn/opa-mcp"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: OPA_URL (Base URL of a running OPA server. Required only for opa_* runtime tools, not for rego_* language tools), OPA_TOKEN (Bearer token for OPA running with --authentication=token), OPA_BINARY (Path to the opa binary. Defaults to 'opa' on PATH), REGAL_BINARY (Path to the regal binary (optional; used by rego_lint, rego_security_audit and rego_fix). Defaults to 'regal' on PATH), CONFTEST_BINARY (Path to the conftest binary (optional, used by conftest_* tools). Defaults to 'conftest' on PATH), OPA_MCP_ALLOWED_PATHS (Comma-separated list of root directories tools may read/write. When unset, file-based tools refuse to access the disk), GITHUB_TOKEN (GitHub personal access token with the "gist" scope. Required only for rego_playground_share).