OPA MCP

An open-source Model Context Protocol server that allows AI agents to author, validate, debug, and explain Open Policy Agent (OPA) Rego policies. It provides over 50 tools for policy evaluation, bundle operations, server management, and Conftest configuration testing, bundling the OPA binary for ease of use.

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Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by Orygn

Vendor documentation

What you can do with it

Author and edit Rego policies
Validate and debug policy logic
Explain policy decisions and traces
Run Conftest configuration tests

Source and maintenance

Community listingRegistry 0.9.1

mcp-registry: io.github.OrygnsCode/opa-mcp@0.9.1 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@orygn/opa-mcp 0.9.1

npmnpx

@orygn/opa-mcp package definition

{
  "version": "0.9.1",
  "transport": "stdio",
  "identifier": "@orygn/opa-mcp",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "OPA_URL",
      "default": "http://localhost:8181",
      "description": "Base URL of a running OPA server. Required only for opa_* runtime tools, not for rego_* language tools."
    },
    {
      "name": "OPA_TOKEN",
      "description": "Bearer token for OPA running with --authentication=token."
    },
    {
      "name": "OPA_BINARY",
      "default": "opa",
      "description": "Path to the opa binary. Defaults to 'opa' on PATH."
    },
    {
      "name": "REGAL_BINARY",
      "default": "regal",
      "description": "Path to the regal binary (optional; used by rego_lint, rego_security_audit and rego_fix). Defaults to 'regal' on PATH."
    },
    {
      "name": "CONFTEST_BINARY",
      "default": "conftest",
      "description": "Path to the conftest binary (optional, used by conftest_* tools). Defaults to 'conftest' on PATH."
    },
    {
      "name": "OPA_MCP_ALLOWED_PATHS",
      "description": "Comma-separated list of root directories tools may read/write. When unset, file-based tools refuse to access the disk."
    },
    {
      "name": "GITHUB_TOKEN",
      "description": "GitHub personal access token with the \"gist\" scope. Required only for rego_playground_share."
    }
  ]
}

Tools

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No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "opa-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@orygn/opa-mcp@0.9.1"
      ],
      "env": {
        "OPA_URL": "<YOUR_OPA_URL>",
        "OPA_TOKEN": "<YOUR_OPA_TOKEN>",
        "OPA_BINARY": "<YOUR_OPA_BINARY>",
        "REGAL_BINARY": "<YOUR_REGAL_BINARY>",
        "CONFTEST_BINARY": "<YOUR_CONFTEST_BINARY>",
        "OPA_MCP_ALLOWED_PATHS": "<YOUR_OPA_MCP_ALLOWED_PATHS>",
        "GITHUB_TOKEN": "<YOUR_GITHUB_TOKEN>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "opa-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@orygn/opa-mcp@0.9.1"
      ],
      "env": {
        "OPA_URL": "<YOUR_OPA_URL>",
        "OPA_TOKEN": "<YOUR_OPA_TOKEN>",
        "OPA_BINARY": "<YOUR_OPA_BINARY>",
        "REGAL_BINARY": "<YOUR_REGAL_BINARY>",
        "CONFTEST_BINARY": "<YOUR_CONFTEST_BINARY>",
        "OPA_MCP_ALLOWED_PATHS": "<YOUR_OPA_MCP_ALLOWED_PATHS>",
        "GITHUB_TOKEN": "<YOUR_GITHUB_TOKEN>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "opa-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@orygn/opa-mcp@0.9.1"
      ],
      "env": {
        "OPA_URL": "<YOUR_OPA_URL>",
        "OPA_TOKEN": "<YOUR_OPA_TOKEN>",
        "OPA_BINARY": "<YOUR_OPA_BINARY>",
        "REGAL_BINARY": "<YOUR_REGAL_BINARY>",
        "CONFTEST_BINARY": "<YOUR_CONFTEST_BINARY>",
        "OPA_MCP_ALLOWED_PATHS": "<YOUR_OPA_MCP_ALLOWED_PATHS>",
        "GITHUB_TOKEN": "<YOUR_GITHUB_TOKEN>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "opa-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@orygn/opa-mcp@0.9.1"
      ],
      "env": {
        "OPA_URL": "<YOUR_OPA_URL>",
        "OPA_TOKEN": "<YOUR_OPA_TOKEN>",
        "OPA_BINARY": "<YOUR_OPA_BINARY>",
        "REGAL_BINARY": "<YOUR_REGAL_BINARY>",
        "CONFTEST_BINARY": "<YOUR_CONFTEST_BINARY>",
        "OPA_MCP_ALLOWED_PATHS": "<YOUR_OPA_MCP_ALLOWED_PATHS>",
        "GITHUB_TOKEN": "<YOUR_GITHUB_TOKEN>"
      }
    }
  }
}

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