API Portal Integration with Claude Desktop MCP

You can integrate Apinizer API Portal with Claude Desktop through Model Context Protocol (MCP). With this integration, you can perform API discovery, application management, testing, and analytics operations using all MCP tools of API Portal through Claude Desktop. Provides step-by-step installation and configuration instructions for Windows, macOS, and Linux operating systems.

Prerequisites

Claude Desktop

Must be downloaded and installed from the official Anthropic website.

Download Link

Node.js

MCP servers run on Node.js. v16.0.0 or higher is required.

Download Link

MCP SDK

Can be installed globally for advanced usage (optional).

Node.js Installation Check

After installation, you can check the version with the following command in terminal/command prompt:

node --version
npm --version

Minimum Requirements:

• Node.js v16.0.0 or higher
• npm v8.0.0 or higher

MCP SDK Installation (Optional)

You can install MCP SDK globally for advanced usage:

npm install -g @modelcontextprotocol/sdk

Model Context Protocol (MCP) is an open standard that enables AI assistants to securely communicate with external tools and data sources. Claude Desktop can work integrated with Apinizer API Portal thanks to this protocol.

More information: https://modelcontextprotocol.io/quickstart/user

Getting Apinizer MCP Token

1. Enabling MCP Usage from Apinizer Management Console

Go to Portal settings page in Apinizer interface and enable MCP.

2. Logging into API Portal and Creating Token for MCP Connection

1. Log into API Portal

   Log into Apinizer API Portal

2. Go to Profile Page

   Go to My Profile page

3. Go to Token Section

   Scroll down to API Access Tokens section at the bottom of the page

4. Create Token

   Click the Create Token button

5. Enter Token Information

   Give the token a name, determine the token’s lifetime, and create it

6. Save Token

   Store the created token in a secure location

Claude Desktop MCP Configuration

1. Accessing Configuration File

1. Go to Settings

   Go to Settings > Developer > Local MCP Servers page in Claude Desktop

2. Edit Config File

   Click the Edit Config button

This operation will create a configuration file in the following locations:

macOS

~/Library/Application Support/Claude/claude_desktop_config.json

Windows

%APPDATA%\Claude\claude_desktop_config.json

Linux

~/.config/claude/claude_desktop_config.json

2. Preparing Proxy Files

First, you need to save MCP proxy files to a folder on your system. Save the files with the following content. Confirm that you do not need Administration permissions when accessing the files, change the location where you save them if necessary.

The recommended directory structure is as follows. Different directory paths are used for Windows, macOS, and Linux.

Windows

C:\Users\[kullanıcı_adı]\AppData\Local\Claude\mcp\
├── apinizer_http_proxy.js
└── apinizer_ws_proxy.js

macOS/Linux

~/.claude/mcp/
├── apinizer_http_proxy.js
└── apinizer_ws_proxy.js

HTTP Connection Settings (apinizer_http_proxy.js)

If you are on Unix/Linux/macOS systems, you must add the following expression at the beginning of this file you will create.

#!/usr/bin/env node

const http = require('http');
const https = require('https');
const readline = require('readline');

//// Get configuration from environment variables
const MCP_TOKEN = process.env.APINIZER_TOKEN;
const HTTP_HOSTNAME = process.env.HTTP_HOSTNAME;

// Use default values if values are not entered in config file for those other than APINIZER_TOKEN and HTTP_HOSTNAME
const HTTP_PORT = parseInt(process.env.HTTP_PORT || '443');
const HTTP_PATH = process.env.HTTP_PATH || '/apiportal/management/mcp/api';
const TOKEN_HEADER = process.env.TOKEN_HEADER || 'APINIZER-TOKEN';
const TIMEOUT = parseInt(process.env.TIMEOUT_AS_MS) || 30000;

// HTTPS configuration
const USE_HTTPS = process.env.USE_HTTPS || true;
const VERIFY_CERTIFICATE = process.env.VERIFY_CERTIFICATE !== 'false'; // Default: true

// Protocol selection
const PROTOCOL = USE_HTTPS ? 'https' : 'http';
const httpModule = USE_HTTPS ? https : http;

console.error('HTTP/HTTPS Proxy Configuration:');
console.error(`- Endpoint: ${PROTOCOL}://${HTTP_HOSTNAME}:${HTTP_PORT}${HTTP_PATH}`);
console.error(`- Protocol: ${PROTOCOL.toUpperCase()}`);
console.error(`- Method: POST`);
console.error(`- Token Header: ${TOKEN_HEADER}`);
console.error(`- Token: ${MCP_TOKEN.substring(0, 8)}...`);
console.error(`- Certificate Verification: ${USE_HTTPS ? VERIFY_CERTIFICATE : 'N/A'}`);

async function sendHttpRequest(data) {
    return new Promise((resolve, reject) => {
        const postData = JSON.stringify(data);
        const options = {
            hostname: HTTP_HOSTNAME,
            port: HTTP_PORT,
            path: HTTP_PATH,
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
                'Accept': 'application/json',
                [TOKEN_HEADER]: MCP_TOKEN
            }
        };

        // Certificate verification setting for HTTPS
        if (USE_HTTPS && !VERIFY_CERTIFICATE) {
            options.rejectUnauthorized = false;
            options.requestCert = false;
            console.error('WARNING: Certificate verification is disabled!');
        }

        const req = httpModule.request(options, (res) => {
            let responseData = '';
            res.on('data', (chunk) => {
                responseData += chunk;
            });
            res.on('end', () => {
                console.error(`Status: ${res.statusCode}`);
                console.error(`Raw Response: ${responseData}`);
                
                // 401 Unauthorized check
                if (res.statusCode === 401) {
                    reject(new Error('Unauthorized: Invalid MCP token'));
                    return;
                }
                
                // 403 Forbidden check
                if (res.statusCode === 403) {
                    reject(new Error('Forbidden: Access denied'));
                    return;
                }
                
                // 404 Not Found check
                if (res.statusCode === 404) {
                    reject(new Error(`Not Found: ${HTTP_PATH}`));
                    return;
                }
                
                // 500+ Server Error check
                if (res.statusCode >= 500) {
                    reject(new Error(`Server Error: ${res.statusCode}`));
                    return;
                }
                
                try {
                    const response = JSON.parse(responseData);
                    
                    // Ultra secure cleanup for Claude Desktop
                    const cleanResponse = {
                        jsonrpc: response.jsonrpc || "2.0"
                    };
                    
                    // ID check - null, undefined, or notification status
                    if (response.id !== null && response.id !== undefined) {
                        cleanResponse.id = response.id;
                    } else if (data.method && data.method.startsWith('notifications/')) {
                        console.error('Notification detected - skipping ID');
                    } else {
                        cleanResponse.id = data.id || "unknown";
                    }
                    
                    // Add if result exists
                    if (response.result !== null && response.result !== undefined) {
                        cleanResponse.result = response.result;
                    }
                    
                    // Add if error exists
                    if (response.error !== null && response.error !== undefined) {
                        cleanResponse.error = response.error;
                    }
                    
                    // Special handling for notifications
                    if (data.method && data.method.startsWith('notifications/')) {
                        console.error('Notification acknowledged - no response sent');
                        return;
                    }
                    
                    console.error(`Cleaned Response: ${JSON.stringify(cleanResponse)}`);
                    resolve(cleanResponse);
                } catch (error) {
                    console.error(`Parse Error: ${error.message}`);
                    reject(new Error(`Invalid JSON: ${responseData.substring(0, 100)}`));
                }
            });
        });

        req.on('error', (error) => {
            console.error(`Request Error: ${error.message}`);
            // Certificate error check
            if (error.code === 'UNABLE_TO_VERIFY_LEAF_SIGNATURE' || 
                error.code === 'CERT_HAS_EXPIRED' || 
                error.code === 'DEPTH_ZERO_SELF_SIGNED_CERT' || 
                error.code === 'SELF_SIGNED_CERT_IN_CHAIN') {
                console.error('Certificate Error detected. You can disable verification with VERIFY_CERTIFICATE=false');
            }
            reject(error);
        });

        // Add timeout
        req.setTimeout(TIMEOUT, () => {
            req.destroy();
            reject(new Error('Request timeout after ' + TIMEOUT + ' seconds'));
        });

        req.write(postData);
        req.end();
    });
}

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    terminal: false
});

rl.on('line', async (line) => {
    try {
        console.error(`Input: ${line}`);
        const request = JSON.parse(line);
        
        // Special handling for notifications
        if (request.method && request.method.startsWith('notifications/')) {
            console.error('Processing notification...');
            await sendHttpRequest(request);
            return;
        }
        
        const response = await sendHttpRequest(request);
        if (response) {
            console.log(JSON.stringify(response));
        }
    } catch (error) {
        console.error('Error:', error.message);
        let errorCode = -32603;
        
        // Determine error code
        if (error.message.includes('Unauthorized')) {
            errorCode = -32001;
        } else if (error.message.includes('Forbidden')) {
            errorCode = -32002;
        } else if (error.message.includes('Not Found')) {
            errorCode = -32003;
        } else if (error.message.includes('timeout')) {
            errorCode = -32004;
        } else if (error.message.includes('Invalid JSON')) {
            errorCode = -32700;
        } else if (error.code && error.code.includes('CERT')) {
            errorCode = -32005;
            error.message = `Certificate Error: ${error.code}. Set VERIFY_CERTIFICATE=false to bypass`;
        }
        
        const errorResponse = {
            jsonrpc: "2.0",
            id: "error",
            error: {
                code: errorCode,
                message: error.message
            }
        };
        console.log(JSON.stringify(errorResponse));
    }
});

// Security warning
if (USE_HTTPS && !VERIFY_CERTIFICATE) {
    console.error('\nWARNING: Running in INSECURE mode with certificate verification disabled!');
    console.error('This should only be used for development/testing purposes.\n');
}

console.error(`Secure MCP ${PROTOCOL.toUpperCase()} proxy started`);
console.error(`Using token: ${MCP_TOKEN.substring(0, 8)}...`);

WebSocket Connection Settings (apinizer_ws_proxy.js)

#!/usr/bin/env node

const connection = require('wss');
const readline = require('readline');

// Get token from environment variable
const APINIZER_TOKEN = process.env.APINIZER_TOKEN;
const HTTP_HOSTNAME = process.env.HTTP_HOSTNAME;
const APINIZER_PORT = process.env.APINIZER_PORT;
const WS_URL = 'wss://' + HTTP_HOSTNAME + ':' + APINIZER_PORT + '/apiportal/management/mcp/ws';

let ws;

function cleanMcpResponse(jsonStr) {
    try {
        const response = JSON.parse(jsonStr);
        
        // Create clean format for Claude Desktop
        const cleanResponse = {
            jsonrpc: response.jsonrpc || "2.0",
            id: response.id
        };
        
        // Add if result exists
        if (response.result !== null && response.result !== undefined) {
            cleanResponse.result = response.result;
        }
        
        // Add if error exists
        if (response.error !== null && response.error !== undefined) {
            cleanResponse.error = response.error;
        }
        
        return JSON.stringify(cleanResponse);
    } catch (error) {
        console.error('Clean response error:', error.message);
        return jsonStr;
    }
}

function connect() {
    console.error('Connecting to WebSocket server with token...');
    
    // WebSocket connection options with headers
    const wsOptions = {
        headers: {
            'APINIZER-TOKEN': APINIZER_TOKEN
        }
    };
    
    ws = new connection(WS_URL, wsOptions);
    
    ws.on('open', () => {
        console.error(`Connected to MCP WebSocket server with token: ${APINIZER_TOKEN.substring(0, 8)}...`);
        
        const rl = readline.createInterface({
            input: process.stdin,
            output: process.stdout,
            terminal: false
        });
        
        rl.on('line', (line) => {
            if (ws.readyState === connection.OPEN) {
                console.error('Sending to WebSocket:', line);
                ws.send(line);
            }
        });
        
        process.stdin.on('end', () => {
            console.error('Stdin ended, closing connection');
            ws.close();
        });
    });
    
    ws.on('message', (data) => {
        const message = data.toString().trim();
        console.error('Received from WebSocket:', message);
        
        try {
            // Validate JSON
            const parsed = JSON.parse(message);
            
            // Clean response
            const cleanedMessage = cleanMcpResponse(message);
            console.error('Cleaned response:', cleanedMessage);
            
            // Send to Claude Desktop
            console.log(cleanedMessage);
        } catch (error) {
            console.error('JSON Parse Error:', error.message);
            console.error('Raw message:', message);
            
            // Send error response
            const errorResponse = {
                jsonrpc: "2.0",
                id: "error",
                error: {
                    code: -32603,
                    message: `WebSocket JSON parse error: ${error.message}`
                }
            };
            console.log(JSON.stringify(errorResponse));
        }
    });
    
    ws.on('close', (code, reason) => {
        console.error(`WebSocket closed: ${code} ${reason}`);
        if (code === 1002) {
            console.error('WebSocket closed due to protocol error - possibly authentication failed');
        }
        process.exit(0);
    });
    
    ws.on('error', (error) => {
        console.error('WebSocket error:', error.message);
        if (error.message.includes('401') || error.message.includes('403')) {
            console.error('Authentication failed: Check your MCP token');
        }
        process.exit(1);
    });
}

// Handle process termination
process.on('SIGINT', () => {
    console.error('Received SIGINT, closing connection');
    if (ws) {
        ws.close();
    }
    process.exit(0);
});

process.on('SIGTERM', () => {
    console.error('Received SIGTERM, closing connection');
    if (ws) {
        ws.close();
    }
    process.exit(0);
});

connect();

For Setting File Permissions (Unix/Linux/macOS):

chmod +x ~/.claude/mcp/apinizer_http_proxy.js
chmod +x ~/.claude/mcp/apinizer_ws_proxy.js

3. Editing Configuration File

Edit the claude_desktop_config.json file as follows.

Replace the following placeholder values with your own information:

• <API_PORTAL_HTTP_ACCESS_CONFIGURATION_FILE>: Full path of HTTP proxy file
• <API_PORTAL_WS_ACCESS_CONFIGURATION_FILE>: Full path of WebSocket proxy file
• <API_PORTAL_ACCESS_TOKEN>: Your Apinizer API Portal token starting with “mcp_”
• <API_PORTAL_MCP_ADDRESS>: Your Apinizer API Portal access address (e.g., “apiportal.apinizer.com”)

File Path Examples:

Windows

• "C:\\Users\\[kullanıcı_adı]\\AppData\\Local\\Claude\\mcp\\apinizer_http_proxy.js"
• "C:\\Users\\[kullanıcı_adı]\\AppData\\Local\\Claude\\mcp\\apinizer_ws_proxy.js"

macOS/Linux

• "/Users/[kullanıcı_adı]/.claude/mcp/apinizer_http_proxy.js"
• "/Users/[kullanıcı_adı]/.claude/mcp/apinizer_ws_proxy.js"

Claude Desktop MCP Connection Settings (claude_desktop_config.json)

{
  "mcpServers": {
    "apinizer-portal-mcp-http": {
      "command": "node",
      "args": [
        "<API_PORTAL_HTTP_ACCESS_CONFIGURATION_FILE>"
      ],
      "env": {
        "APINIZER_TOKEN": "<API_PORTAL_ACCESS_TOKEN>",
        "HTTP_HOSTNAME": "<API_PORTAL_MCP_ADDRESS>",
        "TIMEOUT_AS_MS": "30000"
      }
    },
    "apinizer-portal-mcp-websocket": {
      "command": "node",
      "args": [
        "<API_PORTAL_WS_ACCESS_CONFIGURATION_FILE>"
      ],
      "env": {
        "APINIZER_TOKEN": "<API_PORTAL_ACCESS_TOKEN>",
        "HTTP_HOSTNAME": "<API_PORTAL_MCP_ADDRESS>",
        "TIMEOUT_AS_MS": "30000"
      }
    }
  }
}

Restarting Claude Desktop

For configuration changes to take effect, you need to completely close and reopen Claude Desktop:

1. Close Claude Desktop

   Completely close Claude Desktop

2. Exit from System Tray

   Windows: Also exit from system tray (bottom right corner)

   macOS: Right-click on Dock and select “Quit”

3. Reopen

   Reopen the application

Connection Check

1. Settings Check

After reopening Claude Desktop:

1. Go to Settings

   Go to Settings > Developer > Local MCP Servers page

2. Check Servers

   Verify that Apinizer MCP servers appear in the list

3. Verify Connection Status

   Verify that connection statuses are displayed as Connected

2. Connection Test

To test whether the connection is successful, you can ask Claude questions like:

-How many APIs are in my Apinizer API portal?
-Can you connect to Apinizer API portal with mcp_xxx token?
-Is my connection to Apinizer API portal working?

Troubleshooting

Server not connected Error

Possible Causes:

• Token is invalid or incorrect
• Network connection issue
• Incorrect host/port information

Solution Steps:

• Check token from Apinizer Portal
• Test network connection (ping apiportal.apinizer.com)
• Verify host/port information in configuration
• Create a new token and try

Command not found Error

Cause: Node.js is not installed or not defined in PATH

Solution:

# Check Node.js installation
node --version
npm --version

# If not installed, install again
# Windows: Download from nodejs.org
# macOS: brew install node
# Linux: sudo apt-get install nodejs npm

File not found Error

Cause: Proxy file paths are incorrect

Solution:

• Check file paths
• Verify that files are actually in that location
• Use absolute path (instead of relative path)

Permission denied Error

Cause: File permissions issue

macOS/Linux Solution:

chmod +x ~/.claude/mcp/apinizer_http_proxy.js
chmod +x ~/.claude/mcp/apinizer_ws_proxy.js

Windows Solution:

• Right-click files
• Check permissions in Properties → Security
• If necessary, open Claude Desktop with “Run as Administrator”

SSL/TLS Connection Errors

Cause: Corporate firewall or proxy

Solution:

Add this part to the Json file:

{
  "env": {
    "NODE_TLS_REJECT_UNAUTHORIZED": "0",
    "HTTPS_PROXY": "http://your-proxy:port"
  }
}

Reviewing Log Files

For more detailed check, review log files:

Windows

%APPDATA%\Claude\logs\

macOS

~/Library/Logs/Claude/

Linux

~/.config/claude/logs/

Support

If you encounter problems during installation:

• Review the steps in this document again
• Check log files
• Contact Apinizer support team

Security Notes

Token Security

• Create tokens with minimal validity period (30-90 days)
• Store tokens in secure password manager
• Never store tokens in code repository
• Immediately revoke unused tokens
• Regularly perform token rotation

System Security

• Store proxy files in secure directory
• Keep file permissions at minimum required level
• Backup configuration file
• Monitor network traffic

Monitoring

• Regularly check connection logs
• Track abnormal API usage