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Update readme with example stdio config
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Chiran Fernando
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280
README.md
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README.md
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# Open MCP Auth Proxy
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# Open MCP Auth Proxy
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The Open MCP Auth Proxy is a lightweight proxy designed to sit in front of MCP servers and enforce authorization in compliance with the [Model Context Protocol authorization](https://spec.modelcontextprotocol.io/specification/2025-03-26/basic/authorization/) requirements. It intercepts incoming requests, validates tokens, and offloads authentication and authorization to an OAuth-compliant Identity Provider.
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A lightweight authorization proxy for Model Context Protocol (MCP) servers that enforces authorization according to the [MCP authorization specification](https://spec.modelcontextprotocol.io/specification/2025-03-26/basic/authorization/).
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## **Setup and Installation**
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## What it Does
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### **Prerequisites**
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Open MCP Auth Proxy sits between MCP clients and your MCP server to:
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* Go 1.20 or higher
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- Intercept incoming requests
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* A running MCP server (SSE transport supported)
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- Validate authorization tokens
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* An MCP client that supports MCP authorization
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- Offload authentication and authorization to OAuth-compliant Identity Providers
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- Support the MCP authorization protocol
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### **Installation**
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## Quick Start
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### Prerequisites
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* Go 1.20 or higher
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* A running MCP server
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* An MCP client that supports MCP authorization
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### Installation
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```bash
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```bash
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git clone https://github.com/wso2/open-mcp-auth-proxy
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git clone https://github.com/wso2/open-mcp-auth-proxy
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cd open-mcp-auth-proxy
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cd open-mcp-auth-proxy
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go get github.com/golang-jwt/jwt/v4 gopkg.in/yaml.v2
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go get github.com/golang-jwt/jwt/v4
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go get gopkg.in/yaml.v2
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go build -o openmcpauthproxy ./cmd/proxy
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go build -o openmcpauthproxy ./cmd/proxy
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```
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```
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## Using Open MCP Auth Proxy
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### Basic Usage
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### Transport Modes
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1. The repository comes with a default `config.yaml` file that contains the basic configuration:
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The Open MCP Auth Proxy supports two transport modes:
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1. **SSE Mode (Default)**: For MCP servers that use Server-Sent Events transport
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2. **stdio Mode**: For MCP servers that use stdio transport, which requires starting a subprocess
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You can specify the transport mode in the `config.yaml` file:
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```yaml
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```yaml
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transport_mode: "sse" # Options: "sse" or "stdio"
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```
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Or use the `--stdio` flag to override the configuration:
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```bash
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./openmcpauthproxy --stdio
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```
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### Configuration
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The configuration uses a unified structure with common settings and transport-specific options:
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```yaml
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# Common configuration
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listen_port: 8080
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listen_port: 8080
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base_url: "http://localhost:8000" # Base URL for the MCP server
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base_url: "http://localhost:8000" # Your MCP server URL
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port: 8000 # Port for the MCP server
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# Path configuration
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paths:
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paths:
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sse: "/sse" # SSE endpoint path
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sse: "/sse"
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messages: "/messages" # Messages endpoint path
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messages: "/messages/"
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# Transport mode configuration
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transport_mode: "sse" # Options: "sse" or "stdio"
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# stdio-specific configuration (used only when transport_mode is "stdio")
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stdio:
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enabled: true
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user_command: "npx -y @modelcontextprotocol/server-github"
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work_dir: "" # Working directory (optional)
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```
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```
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**Notes:**
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2. Start the proxy in demo mode (uses pre-configured authentication with Asgardeo sandbox):
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- In SSE mode, the proxy connects to an external MCP server at the specified `base_url`
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- In stdio mode, the proxy starts a subprocess using the `stdio.user_command` configuration
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- Common settings like `base_url`, `port`, and `paths` are used for both transport modes
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### Quick Start
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If you don't have an MCP server, follow the instructions given here to start your own MCP server for testing purposes.
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1. Navigate to `resources` directory.
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2. Initialize a virtual environment.
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```bash
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python3 -m venv .venv
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```
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3. Activate virtual environment.
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```bash
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source .venv/bin/activate
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```
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4. Install dependencies.
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```
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pip3 install -r requirements.txt
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```
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5. Start the server.
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```bash
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python3 echo_server.py
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```
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#### Configure the Auth Proxy
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Update the necessary parameters in `config.yaml` as shown in the examples above.
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#### Start the Auth Proxy
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For the demo mode with pre-configured authentication:
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```bash
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```bash
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./openmcpauthproxy --demo
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./openmcpauthproxy --demo
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```
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```
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For standard mode:
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3. Connect using an MCP client like [MCP Inspector](https://github.com/shashimalcse/inspector)(This is a temporary fork with fixes for authentication [issues](https://github.com/modelcontextprotocol/typescript-sdk/issues/257) in the original implementation)
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## Identity Provider Integration
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### Demo Mode
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For quick testing, use the `--demo` flag which includes pre-configured authentication and authorization with an Asgardeo sandbox.
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```bash
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```bash
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./openmcpauthproxy
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./openmcpauthproxy --demo
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```
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```
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For stdio mode:
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### Asgardeo Integration
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```bash
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To enable authorization through your own Asgardeo organization:
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./openmcpauthproxy --stdio
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```
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The `--demo` flag enables a demonstration mode with pre-configured authentication and authorization with a sandbox powered by [Asgardeo](https://asgardeo.io/).
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1. [Register](https://asgardeo.io/signup) and create an organization in Asgardeo
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2. Create an [M2M application](https://wso2.com/asgardeo/docs/guides/applications/register-machine-to-machine-app/)
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#### Connect Using an MCP Client
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3. Authorize this application to invoke "Application Management API" with the `internal_application_mgt_create` scope
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4. Update the existing `config.yaml` with your Asgardeo details:
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You can use this fork of the [MCP Inspector](https://github.com/shashimalcse/inspector) to test the connection and try out the complete authorization flow. (This is a temporary fork with fixes for authentication [issues](https://github.com/modelcontextprotocol/typescript-sdk/issues/257) in the original implementation)
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### Use with Asgardeo
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Enable authorization for the MCP server through your own Asgardeo organization
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1. [Register]([url](https://asgardeo.io/signup)) and create an organization in Asgardeo
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2. Now, you need to authorize the OpenMCPAuthProxy to allow dynamically registering MCP Clients as applications in your organization. To do that,
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1. Create an [M2M application](https://wso2.com/asgardeo/docs/guides/applications/register-machine-to-machine-app/)
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1. [Authorize this application](https://wso2.com/asgardeo/docs/guides/applications/register-machine-to-machine-app/#authorize-the-api-resources-for-the-app) to invoke "Application Management API" with the `internal_application_mgt_create` scope.
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2. Note the **Client ID** and **Client secret** of this application. This is required by the auth proxy
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#### Configure the Auth Proxy
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Create a configuration file config.yaml with the following parameters:
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```yaml
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```yaml
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# Common configuration
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# Add to your config.yaml
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listen_port: 8080
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asgardeo:
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base_url: "http://localhost:8000" # Base URL for the MCP server
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org_name: "<your_org_name>"
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client_id: "<client_id>"
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# Path configuration
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client_secret: "<client_secret>"
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paths:
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sse: "/sse"
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messages: "/messages"
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# Transport mode
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transport_mode: "sse" # or "stdio"
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asgardeo:
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org_name: "<org_name>" # Your Asgardeo org name
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client_id: "<client_id>" # Client ID of the M2M app
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client_secret: "<client_secret>" # Client secret of the M2M app
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```
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```
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#### Start the Auth Proxy
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5. Start the proxy with Asgardeo integration:
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```bash
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```bash
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./openmcpauthproxy --asgardeo
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./openmcpauthproxy --asgardeo
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```
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```
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#### Integrating with existing OAuth Providers
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### Other OAuth Providers
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- [Auth0](docs/Auth0.md) - Enable authorization for the MCP server through your Auth0 organization.
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- [Auth0 Integration Guide](docs/Auth0.md)
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## Testing with an Example MCP Server
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If you don't have an MCP server, you can use the included example:
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1. Navigate to the `resources` directory
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2. Set up a Python environment:
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```bash
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python3 -m venv .venv
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source .venv/bin/activate
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pip3 install -r requirements.txt
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```
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3. Start the example server:
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```bash
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python3 echo_server.py
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```
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# Advanced Configuration
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### Transport Modes
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The proxy supports two transport modes:
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- **SSE Mode (Default)**: For Server-Sent Events transport
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- **stdio Mode**: For MCP servers that use stdio transport
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When using stdio mode, the proxy can:
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- Connect to an already running MCP server that uses stdio transport
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- Start an MCP server as a subprocess using the command specified in the configuration
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- **Note**: Any commands specified (like `npx` in the example below) must be installed on your system first
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To use stdio mode:
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```bash
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./openmcpauthproxy --stdio
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```
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#### Example: Running an MCP Server as a Subprocess
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1. Configure stdio mode in your `config.yaml`:
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```yaml
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listen_port: 8080
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base_url: "http://localhost:8000"
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stdio:
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enabled: true
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user_command: "npx -y @modelcontextprotocol/server-github" # Example using a GitHub MCP server
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env: # Environment variables (optional)
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- "GITHUB_PERSONAL_ACCESS_TOKEN=gitPAT"
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```
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2. Run the proxy with stdio mode:
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```bash
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./openmcpauthproxy --demo
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```
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The proxy will:
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- Start the MCP server as a subprocess using the specified command
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- Handle all authorization requirements
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- Forward messages between clients and the server
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### Complete Configuration Reference
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```yaml
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# Common configuration
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listen_port: 8080
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base_url: "http://localhost:8000"
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port: 8000
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# Path configuration
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paths:
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sse: "/sse"
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messages: "/messages/"
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# Transport mode
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transport_mode: "sse" # Options: "sse" or "stdio"
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# stdio-specific configuration (used only in stdio mode)
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stdio:
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enabled: true
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user_command: "npx -y @modelcontextprotocol/server-github" # Command to start the MCP server (requires npx to be installed)
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work_dir: "" # Optional working directory for the subprocess
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# Asgardeo configuration (used with --asgardeo flag)
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asgardeo:
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org_name: "<org_name>"
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client_id: "<client_id>"
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client_secret: "<client_secret>"
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```
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