example-remote-server/examples

MCP Server Examples

These examples demonstrate interaction with the MCP server, covering OAuth authentication, session management, and MCP operations (tools, resources, prompts).

Authentication is the most complex part of using an MCP server with OAuth. The examples demonstrate authentication interactions using two different step-by-step approaches:

• client.js: runs the server's end-to-end auth flow in the browser
• curl-examples.sh: uses raw HTTP interactions (requires obtaining an access token separately)

See below for details.

Prerequisites

Before running any examples, ensure:

1. Redis is running: docker compose up -d
2. Both servers are running: npm run dev
3. Servers are accessible at:
   • Auth Server: http://localhost:3001
   • MCP Server: http://localhost:3232

Available Examples

client.js

Node.js client showing programmatic interaction with the MCP server.

Features:

• Complete OAuth flow demonstration
• Automatic client registration
• MCP session management
• Tool and resource operations

Usage:

# Run the example
node client.js

# Or make it executable
chmod +x client.js
./client.js

Note: When you complete the OAuth flow in your browser, you'll be redirected to http://localhost:8080/callback which will show "site can't be reached". This is expected! Simply copy the authorization code from the URL in your browser's address bar (the long string after code=). The script will exchange this for an access token and display it for use with other tools.

curl-examples.sh

Shell script demonstrating API interactions using curl.

Features:

• OAuth client registration
• MCP session initialization
• Tool calls (echo, add)
• Resource listing and reading
• Prompt operations

Three-step workflow:

# Make executable
chmod +x curl-examples.sh

# Step 1: Setup - Register OAuth client and get instructions
./curl-examples.sh

# Step 2: Create session - Get an access token (via Inspector or client.js), then:
./curl-examples.sh YOUR_ACCESS_TOKEN
# → Initializes MCP session and displays session ID

# Step 3: Run examples - Use both access token and session ID:
./curl-examples.sh YOUR_ACCESS_TOKEN YOUR_SESSION_ID
# → Demonstrates all MCP features (tools, resources, prompts)

Quick reference:

• Run ./curl-examples.sh --help for detailed usage
• Requires an access token (get from MCP Inspector or node client.js)
• Each step explains what to do next

Troubleshooting

"401 Unauthorized"

• Token may be expired (7-day TTL)
• Token may be invalid
• Get a new token via OAuth flow

"Session not found"

• Session expired (5-minute TTL)
• Re-initialize with the same token

"Cannot connect"

• Ensure servers are running: npm run dev
• Check Redis is running: docker compose ps
• Verify URLs are correct

Additional Resources

• MCP Protocol Documentation
• OAuth Flow Documentation
• API Endpoints Reference
• Main README