VAP3-932: CLI launch (#558)

* feat: cli launch

* fix: cli URLs

Author: goosewin

fern/cli/authentication.mdx

@@ -0,0 +1,394 @@
+---
+title: MCP integration
+description: Turn your IDE into a Vapi expert with Model Context Protocol
+slug: cli/mcp
+---
+
+## Overview
+
+The Model Context Protocol (MCP) integration transforms your IDE's AI assistant into a Vapi expert. Once configured, your IDE gains complete, accurate knowledge of Vapi's APIs, features, and best practices - eliminating AI hallucinations and outdated information.
+
+**In this guide, you'll learn to:**
+- Set up MCP in supported IDEs
+- Understand what knowledge is provided
+- Use your enhanced IDE effectively
+- Troubleshoot common issues
+
+## Quick start
+
+Run the setup command to auto-configure all supported IDEs:
+
+```bash
+vapi mcp setup
+```
+
+Or configure a specific IDE:
+
+```bash
+vapi mcp setup cursor   # For Cursor
+vapi mcp setup windsurf # For Windsurf  
+vapi mcp setup vscode   # For VSCode with Copilot
+```
+
+## What is MCP?
+
+Model Context Protocol is a standard that allows AI assistants to access structured knowledge and tools. When you set up MCP for Vapi:
+
+- Your IDE's AI gains access to complete Vapi documentation
+- Code suggestions become accurate and up-to-date
+- Examples use real, working Vapi patterns
+- API hallucinations are eliminated
+
+## Supported IDEs
+
+<CardGroup cols={3}>
+  <Card title="Cursor" icon="code" href="https://cursor.sh">
+    AI-first code editor with deep MCP integration
+    
+    **Setup:** Creates `.cursor/mcp.json`
+  </Card>
+  <Card title="Windsurf" icon="wind" href="https://codeium.com/windsurf">
+    Codeium's AI-powered IDE
+    
+    **Setup:** Creates `.windsurf/mcp.json`
+  </Card>
+  <Card title="VSCode" icon="brands microsoft" href="https://code.visualstudio.com">
+    With GitHub Copilot extension
+    
+    **Setup:** Configures Copilot settings
+  </Card>
+</CardGroup>
+
+## How it works
+
+### What gets configured
+
+The MCP setup creates configuration files that connect your IDE to the Vapi MCP server:
+
+<Tabs>
+  <Tab title="Cursor">
+    **File:** `.cursor/mcp.json`
+    ```json
+    {
+      "servers": {
+        "vapi-docs": {
+          "command": "npx",
+          "args": ["@vapi-ai/mcp-server"]
+        }
+      }
+    }
+    ```
+  </Tab>
+  <Tab title="Windsurf">
+    **File:** `.windsurf/mcp.json`
+    ```json
+    {
+      "servers": {
+        "vapi-docs": {
+          "command": "npx",
+          "args": ["@vapi-ai/mcp-server"]
+        }
+      }
+    }
+    ```
+  </Tab>
+  <Tab title="VSCode">
+    **Settings:** Updates workspace settings
+    ```json
+    {
+      "github.copilot.advanced": {
+        "mcp.servers": {
+          "vapi-docs": {
+            "command": "npx",
+            "args": ["@vapi-ai/mcp-server"]
+          }
+        }
+      }
+    }
+    ```
+  </Tab>
+</Tabs>
+
+### What knowledge is provided
+
+Your IDE gains access to:
+
+- **Complete API Reference** - Every endpoint, parameter, and response
+- **Code Examples** - Working samples for all features
+- **Integration Guides** - Step-by-step implementation patterns
+- **Best Practices** - Recommended approaches and patterns
+- **Latest Features** - Always up-to-date with new releases
+- **Troubleshooting** - Common issues and solutions
+
+## Using your enhanced IDE
+
+### Example prompts
+
+Once MCP is configured, try these prompts in your IDE:
+
+<AccordionGroup>
+  <Accordion title="Creating assistants">
+    **Prompt:** "How do I create a voice assistant with Vapi?"
+    
+    Your IDE will provide accurate code like:
+    ```typescript
+    import { VapiClient } from "@vapi-ai/server-sdk";
+    
+    const client = new VapiClient({ token: process.env.VAPI_API_KEY });
+    
+    const assistant = await client.assistants.create({
+      name: "Customer Support",
+      model: {
+        provider: "openai",
+        model: "gpt-4",
+        systemPrompt: "You are a helpful customer support agent..."
+      },
+      voice: {
+        provider: "11labs",
+        voiceId: "rachel"
+      }
+    });
+    ```
+  </Accordion>
+  
+  <Accordion title="Webhook handling">
+    **Prompt:** "Show me how to handle Vapi webhooks"
+    
+    Get complete webhook examples:
+    ```typescript
+    app.post('/webhook', async (req, res) => {
+      const { type, call, assistant } = req.body;
+      
+      switch (type) {
+        case 'call-started':
+          console.log(`Call ${call.id} started`);
+          break;
+        case 'speech-update':
+          console.log(`User said: ${req.body.transcript}`);
+          break;
+        case 'function-call':
+          // Handle tool calls
+          const { functionName, parameters } = req.body.functionCall;
+          const result = await handleFunction(functionName, parameters);
+          res.json({ result });
+          return;
+      }
+      
+      res.status(200).send();
+    });
+    ```
+  </Accordion>
+  
+  <Accordion title="Advanced features">
+    **Prompt:** "How do I set up call recording with custom storage?"
+    
+    Get detailed implementation:
+    ```typescript
+    const assistant = await client.assistants.create({
+      name: "Recorded Assistant",
+      recordingEnabled: true,
+      artifactPlan: {
+        recordingEnabled: true,
+        videoRecordingEnabled: false,
+        recordingPath: "s3://my-bucket/recordings/{call_id}"
+      },
+      credentialIds: ["aws-s3-credential-id"]
+    });
+    ```
+  </Accordion>
+</AccordionGroup>
+
+### Best practices
+
+<Steps>
+  <Step title="Be specific">
+    Ask detailed questions about Vapi features:
+    - ✅ "How do I transfer calls to a human agent in Vapi?"
+    - ❌ "How do I transfer calls?"
+  </Step>
+  
+  <Step title="Request examples">
+    Ask for working code samples:
+    - "Show me a complete example of..."
+    - "Generate a working implementation of..."
+  </Step>
+  
+  <Step title="Check versions">
+    Specify SDK versions when needed:
+    - "Using @vapi-ai/web v2.0, how do I..."
+    - "What's the latest way to..."
+  </Step>
+</Steps>
+
+## Configuration options
+
+### Check status
+
+View current MCP configuration:
+
+```bash
+vapi mcp status
+```
+
+Output:
+```
+MCP Configuration Status:
+✓ Cursor: Configured (.cursor/mcp.json)
+✗ Windsurf: Not configured
+✓ VSCode: Configured (workspace settings)
+
+Vapi MCP Server: v1.2.3 (latest)
+```
+
+### Update server
+
+Keep the MCP server updated:
+
+```bash
+# Update to latest version
+npm update -g @vapi-ai/mcp-server
+
+# Or reinstall
+npm install -g @vapi-ai/mcp-server@latest
+```
+
+### Remove configuration
+
+Remove MCP configuration:
+
+```bash
+# Remove from all IDEs
+vapi mcp remove
+
+# Remove from specific IDE
+vapi mcp remove cursor
+```
+
+## How MCP tools work
+
+The Vapi MCP server provides these tools to your IDE:
+
+<CardGroup cols={2}>
+  <Card title="Search Documentation" icon="magnifying-glass">
+    Semantic search across all Vapi docs
+    
+    **Example:** "How to handle voicemail detection"
+  </Card>
+  <Card title="Get Examples" icon="code">
+    Retrieve code samples for any feature
+    
+    **Example:** "WebSocket connection example"
+  </Card>
+  <Card title="API Reference" icon="book">
+    Get detailed API endpoint information
+    
+    **Example:** "POST /assistant parameters"
+  </Card>
+  <Card title="Implementation Guides" icon="map">
+    Step-by-step guides for complex features
+    
+    **Example:** "Workflow implementation guide"
+  </Card>
+</CardGroup>
+
+## Troubleshooting
+
+<AccordionGroup>
+  <Accordion title="MCP not working in IDE">
+    If your IDE isn't using the MCP knowledge:
+    
+    1. **Restart your IDE** after configuration
+    2. **Check the logs** in your IDE's output panel
+    3. **Verify npm is accessible** from your IDE
+    4. **Ensure MCP server is installed** globally
+    
+    ```bash
+    # Verify installation
+    npm list -g @vapi-ai/mcp-server
+    ```
+  </Accordion>
+  
+  <Accordion title="Permission errors">
+    For permission issues:
+    
+    ```bash
+    # Install with proper permissions
+    sudo npm install -g @vapi-ai/mcp-server
+    
+    # Or use a Node version manager
+    nvm use 18
+    npm install -g @vapi-ai/mcp-server
+    ```
+  </Accordion>
+  
+  <Accordion title="Outdated information">
+    If you're getting old API information:
+    
+    1. Update the MCP server:
+    ```bash
+    npm update -g @vapi-ai/mcp-server
+    ```
+    
+    2. Clear your IDE's cache
+    3. Restart the IDE
+  </Accordion>
+  
+  <Accordion title="Multiple workspaces">
+    For different projects needing different configs:
+    
+    - MCP configuration is per-workspace
+    - Run `vapi mcp setup` in each project
+    - Configuration won't conflict between projects
+  </Accordion>
+</AccordionGroup>
+
+## Advanced usage
+
+### Custom MCP configuration
+
+Modify the generated MCP configuration for advanced needs:
+
+```json
+{
+  "servers": {
+    "vapi-docs": {
+      "command": "npx",
+      "args": ["@vapi-ai/mcp-server"],
+      "env": {
+        "VAPI_MCP_LOG_LEVEL": "debug"
+      }
+    }
+  }
+}
+```
+
+### Using with teams
+
+Share MCP configuration with your team:
+
+1. **Commit the config files** (`.cursor/mcp.json`, etc.)
+2. **Document the setup** in your README
+3. **Include in onboarding** for new developers
+
+Example README section:
+```markdown
+## Development Setup
+
+This project uses Vapi MCP for enhanced IDE support:
+
+1. Install Vapi CLI: `curl -sSL https://vapi.ai/install.sh | bash`
+2. Set up MCP: `vapi mcp setup`
+3. Restart your IDE
+```
+
+## Next steps
+
+With MCP configured:
+
+- **[Initialize a project](/cli/init):** Add Vapi to your codebase
+- **[Test webhooks locally](/cli/webhook):** Debug without external tunnels
+- **[Explore API Reference](/api-reference):** See what your IDE now knows
+
+---
+
+**Pro tip:** After setting up MCP, try asking your IDE to "Create a complete Vapi voice assistant with error handling and logging" - watch it generate production-ready code with all the right patterns!