OPA MCP Server

What the code does

We read the source, 21 h ago · rules 3dff92dd89df

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.

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

  const result = await opa.eval(evalInput, signal);

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

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

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

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

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

This one needs environment variables set before it will start: 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.). The author declared them in the registry entry; get the values from the project itself.