harsha-iiiv · naji247 · Oct 2, 2025 · Oct 2, 2025 · coderabbitai · Oct 2, 2025
diff --git a/README.md b/README.md
@@ -20,6 +20,7 @@ This CLI tool automates the generation of MCP-compatible servers that proxy requ
 - 🔌 **Multiple Transports**: Communicate over stdio, SSE via Hono, or StreamableHTTP.
 - 🧰 **Project Scaffold**: Generates a complete Node.js project with `tsconfig.json`, `package.json`, and entry point.
 - 🧪 **Built-in HTML Test Clients**: Test API interactions visually in your browser (for web-based transports).
+- 📊 **Analytics & Telemetry**: Optional MCPcat analytics and OpenTelemetry support for monitoring and debugging.
 
 ---
 
@@ -44,6 +45,15 @@ openapi-mcp-generator --input path/to/openapi.json --output path/to/output/dir -
 
 # Generate an MCP StreamableHTTP server
 openapi-mcp-generator --input path/to/openapi.json --output path/to/output/dir --transport=streamable-http --port=3000
+
+# Generate with MCPcat analytics enabled
+openapi-mcp-generator --input path/to/openapi.json --output path/to/output/dir --with-mcpcat
+
+# Generate with OpenTelemetry tracing enabled
+openapi-mcp-generator --input path/to/openapi.json --output path/to/output/dir --with-otel
+
+# Generate with both MCPcat analytics and OpenTelemetry
+openapi-mcp-generator --input path/to/openapi.json --output path/to/output/dir --with-mcpcat --with-otel
 ```
 
 ### CLI Options
@@ -58,6 +68,8 @@ openapi-mcp-generator --input path/to/openapi.json --output path/to/output/dir -
 | `--transport`       | `-t`  | Transport mode: `"stdio"` (default), `"web"`, or `"streamable-http"`                                                                           | `"stdio"`                         |
 | `--port`            | `-p`  | Port for web-based transports                                                                                                                  | `3000`                            |
 | `--default-include` |       | Default behavior for x-mcp filtering. Accepts `true` or `false` (case-insensitive). `true` = include by default, `false` = exclude by default. | `true`                            |
+| `--with-mcpcat`     |       | Enable MCPcat product analytics for usage insights and debugging                                                                               | `false`                           |
+| `--with-otel`       |       | Enable OpenTelemetry (OTLP) exporters for distributed tracing and logging                                                                      | `false`                           |
 | `--force`           |       | Overwrite existing files in the output directory without confirmation                                                                          | `false`                           |
 
 ## 📦 Programmatic API
@@ -168,6 +180,43 @@ Configure auth credentials in your environment:
 
 ---
 
+## 📊 Analytics & Telemetry
+
+### MCPcat Analytics
+[MCPcat](https://mcpcat.io) provides product analytics and live debugging tools specifically designed for MCP servers. When enabled with `--with-mcpcat`, your generated server will include:
+
+- Usage tracking and analytics
+- Tool call monitoring
+- Error detection and reporting
+- Performance insights
+
+To use MCPcat:
+1. Sign up for free at [mcpcat.io](https://mcpcat.io)
+2. Get your project ID
+3. Set the `MCPCAT_PROJECT_ID` environment variable
+
+### OpenTelemetry Support
+Enable distributed tracing and logging with `--with-otel` to integrate with your existing observability stack:
+
+- OTLP trace exporters
+- Distributed request tracing
+- Performance metrics
+- Integration with popular observability platforms (Datadog, New Relic, Grafana, etc.)
+
+Configure the OTLP endpoint with the `OTLP_ENDPOINT` environment variable.
+
+### Combined Usage
+Use both flags together (`--with-mcpcat --with-otel`) to get the benefits of both MCPcat's MCP-specific analytics and OpenTelemetry's broader observability ecosystem.
+
+#### Environment Variables
+Configure analytics and telemetry:
+
+| Variable             | Description                                              | Required When      |
+| -------------------- | -------------------------------------------------------- | ------------------ |
+| `MCPCAT_PROJECT_ID`  | Your MCPcat project ID from [mcpcat.io](https://mcpcat.io) | `--with-mcpcat`    |
+| `OTLP_ENDPOINT`      | OpenTelemetry collector endpoint URL                    | `--with-otel`      |
+
+
 ## 🔎 Filtering Endpoints with OpenAPI Extensions
 
 You can control which operations are exposed as MCP tools using a vendor extension flag `x-mcp`. This extension is supported at the root, path, and operation levels. By default, endpoints are included unless explicitly excluded.

diff --git a/src/generator/env-file.ts b/src/generator/env-file.ts
@@ -3,15 +3,18 @@
  */
 import { OpenAPIV3 } from 'openapi-types';
 import { getEnvVarName } from '../utils/security.js';
+import { CliOptions } from '../types/index.js';
 
 /**
  * Generates the content of .env.example file for the MCP server
  *
  * @param securitySchemes Security schemes from the OpenAPI spec
+ * @param options CLI options
  * @returns Content for .env.example file
  */
 export function generateEnvExample(
-  securitySchemes?: OpenAPIV3.ComponentsObject['securitySchemes']
+  securitySchemes?: OpenAPIV3.ComponentsObject['securitySchemes'],
+  options?: CliOptions
 ): string {
   let content = `# MCP Server Environment Variables
 # Copy this file to .env and fill in the values
@@ -57,6 +60,19 @@ LOG_LEVEL=info
     content += `# No API authentication required\n`;
   }
 
+  // Add MCPcat environment variables if enabled
+  if (options?.withMcpcat) {
+    content += `\n# MCPcat -- MCP product analytics and live debugging tools`;
+    content += `\n# Sign up and get your project ID for free at https://mcpcat.io\n`;
+    content += `MCPCAT_PROJECT_ID=proj_0000000  # Replace with your MCPcat project ID\n`;
+  }
+
+  // Add OpenTelemetry environment variables if enabled
+  if (options?.withOtel) {
+    content += `\n# OpenTelemetry Configuration for logging and traces\n`;
+    content += `OTLP_ENDPOINT=http://localhost:4318/v1/traces  # OTLP collector endpoint\n`;
+  }
+
   content += `\n# Add any other environment variables your API might need\n`;
 
   return content;

diff --git a/src/generator/package-json.ts b/src/generator/package-json.ts
@@ -1,17 +1,21 @@
+import { CliOptions } from '../types/index.js';
+
 /**
  * Generates the content of package.json for the MCP server
  *
  * @param serverName Server name
  * @param serverVersion Server version
- * @param transportType Type of transport to use (stdio, web, or streamable-http)
+ * @param options CLI options
  * @returns JSON string for package.json
  */
 export function generatePackageJson(
   serverName: string,
   serverVersion: string,
-  transportType: string = 'stdio'
+  options: CliOptions
 ): string {
+  const transportType = options.transport || 'stdio';
   const includeWebDeps = transportType === 'web' || transportType === 'streamable-http';
+  const includeMcpcat = options.withMcpcat || options.withOtel;
 
-export function generatePackageJson(
-  serverName: string,
-  serverVersion: string,
-  transportType: string = 'stdio'
-  options: CliOptions
-): string {
-  const transportType = options.transport || 'stdio';
-  const includeWebDeps = transportType === 'web' || transportType === 'streamable-http';
-  const includeMcpcat = options.withMcpcat || options.withOtel;
+export function generatePackageJson(
+  serverName: string,
+  serverVersion: string,
+  options: Pick<CliOptions, 'transport' | 'withMcpcat' | 'withOtel'> = {}
+): string {
+  const transportType = options.transport ?? 'stdio';
+  const includeWebDeps = transportType === 'web' || transportType === 'streamable-http';
+  const includeMcpcat = Boolean(options.withMcpcat || options.withOtel);
-export function generatePackageJson(
-  serverName: string,
-  serverVersion: string,
-  transportType: string = 'stdio'
-  options: CliOptions
-): string {
-  const transportType = options.transport || 'stdio';
-  const includeWebDeps = transportType === 'web' || transportType === 'streamable-http';
-  const includeMcpcat = options.withMcpcat || options.withOtel;
+export function generatePackageJson(
+  serverName: string,
+  serverVersion: string,
+  options: Pick<CliOptions, 'transport' | 'withMcpcat' | 'withOtel'> = {}
+): string {
+  const transportType = options.transport ?? 'stdio';
+  const includeWebDeps = transportType === 'web' || transportType === 'streamable-http';
+  const includeMcpcat = Boolean(options.withMcpcat || options.withOtel);
   const packageData: any = {
     name: serverName,
@@ -36,6 +40,7 @@ export function generatePackageJson(
       dotenv: '^16.4.5',
       zod: '^3.24.3',
       'json-schema-to-zod': '^2.6.1',
+      ...(includeMcpcat ? { mcpcat: '^0.1.5' } : {}),
     },
     devDependencies: {
       '@types/node': '^22.15.2',

diff --git a/src/generator/server-code.ts b/src/generator/server-code.ts
@@ -9,6 +9,46 @@ import {
 } from '../utils/code-gen.js';
 import { generateExecuteApiToolFunction } from '../utils/security.js';
 
+/**
+ * Generates MCPcat tracking code based on options
+ */
+function generateMcpcatTracking(options: CliOptions): string {
+  if (!options.withMcpcat && !options.withOtel) {
+    return '';
+  }
+
+  let trackingCode = '\n// MCPcat Product analytics and OpenTelemetry exporters\n';
+
+  if (options.withMcpcat && options.withOtel) {
+    // Both flags enabled
+    trackingCode += `mcpcat.track(server, process.env.MCPCAT_PROJECT_ID || null, {
+  exporters: {
+    otlp: {
+      type: "otlp",
+      endpoint: process.env.OTLP_ENDPOINT || "http://localhost:4318/v1/traces"
+    }
+  }
+});`;
+  } else if (options.withMcpcat) {
+    // Only MCPcat enabled
+    trackingCode += `mcpcat.track(server, process.env.MCPCAT_PROJECT_ID || null);`;
+  } else if (options.withOtel) {
+    // Only OTEL enabled
+    trackingCode += `mcpcat.track(server, null, {
+  enableToolCallContext: false,
+  enableReportMissing: false,
+  exporters: {
+    otlp: {
+      type: "otlp",
+      endpoint: process.env.OTLP_ENDPOINT || "http://localhost:4318/v1/traces"
+    }
+  }
+});`;
+  }
+
+  return trackingCode + '\n';
+}
+
 /**
  * Generates the TypeScript code for the MCP server
  *
@@ -80,6 +120,10 @@ export function generateMcpServerCode(
   }`;
       break;
   }
+  let mcpcatImport = '';
+  if (options.withMcpcat || options.withOtel) {
+    mcpcatImport = `import * as mcpcat from "mcpcat";`;
+  }
 
   // Generate the full server code
   return `#!/usr/bin/env node
@@ -101,6 +145,7 @@ import {
   type CallToolResult,
   type CallToolRequest
 } from "@modelcontextprotocol/sdk/types.js";${transportImport}
+ ${mcpcatImport}
 
 import { z, ZodError } from 'zod';
 import { jsonSchemaToZod } from 'json-schema-to-zod';
@@ -156,6 +201,7 @@ ${listToolsHandlerCode}
 ${callToolHandlerCode}
 ${executeApiToolFunctionCode}
 
+${generateMcpcatTracking(options)}
 /**
  * Main function to start the server
  */

diff --git a/src/index.ts b/src/index.ts
@@ -34,7 +34,8 @@ import { normalizeBoolean } from './utils/helpers.js';
 import pkg from '../package.json' with { type: 'json' };
 
 // Export programmatic API
-export { getToolsFromOpenApi, McpToolDefinition, GetToolsOptions } from './api.js';
+export { getToolsFromOpenApi } from './api.js';
+export type { McpToolDefinition, GetToolsOptions } from './api.js';
 
 // Configure CLI
 const program = new Command();
@@ -87,6 +88,8 @@ program
     true
   )
   .option('--force', 'Overwrite existing files without prompting')
+  .option('--with-mcpcat', 'Enable MCPcat MCP product analytics')
+  .option('--with-otel', 'Enable OpenTelemetry (OTLP) logging')
   .version(pkg.version) // Match package.json version
   .action((options) => {
     runGenerator(options).catch((error) => {
@@ -161,7 +164,7 @@ async function runGenerator(options: CliOptions & { force?: boolean }) {
     const packageJsonContent = generatePackageJson(
       serverName,
       serverVersion,
-      options.transport as TransportType
+      options
     );
 
     console.error('Generating tsconfig.json...');
@@ -180,7 +183,7 @@ async function runGenerator(options: CliOptions & { force?: boolean }) {
     const jestConfigContent = generateJestConfig();
 
     console.error('Generating .env.example file...');
-    const envExampleContent = generateEnvExample(api.components?.securitySchemes);
+    const envExampleContent = generateEnvExample(api.components?.securitySchemes, options);
 
     console.error('Generating OAuth2 documentation...');
     const oauth2DocsContent = generateOAuth2Docs(api.components?.securitySchemes);

diff --git a/src/types/index.ts b/src/types/index.ts
@@ -35,6 +35,10 @@ export interface CliOptions {
    * false = exclude by default unless x-mcp explicitly enables.
    */
   defaultInclude?: boolean;
+  /** Enable MCPcat analytics tracking */
+  withMcpcat?: boolean;
+  /** Enable OpenTelemetry (OTLP) exporters */
+  withOtel?: boolean;
 }
 
 /**