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Learn How to Deploy Claude Code on Ubuntu VPS! This article demonstrates how to deploy Claude Code on Ubuntu VPS. What is Claude Code? Claude Code refers to using Claude (Anthropic’s AI model family) as a development assistant for writing, reviewing, refactoring, and reasoning about code — typically through an API-driven backend, CLI tool, IDE integration, or internal tooling layer. It is powered by models developed by Anthropic. What Claude Code Can Do When integrated into a VPS, IDE, or internal system, it can: Generate production-ready code Refactor legacy codebases Explain complex scripts or logs Create infrastructure configs (Docker, systemd, Nginx, etc.) Write tests and documentation Debug stack traces Assist with DevOps automation Convert code between languages How It’s Typically Used Claude Code isn’t a standalone product by default. It is usually deployed as: API-backed internal assistant A Node/Python backend that sends prompts to Claude and returns responses. CLI tool A terminal-based assistant for server-side development. IDE integration Similar in workflow to tools like: GitHub Copilot Cursor Secure self-hosted relay A VPS-hosted gateway that protects API keys and manages usage. Models Commonly Used for Code Examples include: Claude 3 Opus (advanced reasoning) Claude 3.5 Sonnet (balanced performance) Claude 3 Haiku (fast + lightweight) All accessible via Anthropic’s API. In Simple Terms Claude CodeA programmable AI coding assistant you can deploy inside your own infrastructure. How to Deploy Claude Code on Ubuntu VPS Warning! Giving AI agents access to your server increases security risks. Follow all security hardening best-practices on your VPS environment to reduce these risks. To deploy Claude Code on Ubuntu VPS, follow the steps provided below: Overview This guide walks through deploying Claude Code on a fresh Ubuntu VPS in a secure, production-ready manner, including: OS preparation Node.js installation Claude API configuration Systemd service setup Nginx reverse proxy SSL via Let’s Encrypt Basic hardening Recommended VPS Specifications Minimum: 2 vCPU 4GB RAM 40GB SSD Ubuntu 22.04 LTS (recommended) or Ubuntu 24.04 LTS If you expect heavy concurrent usage (e.g., internal dev team or API relay), scale to 4 vCPU / 8GB RAM. Initial Server Setup Update System apt update && apt upgrade -y Create a Non-Root User adduser claude usermod -aG sudo claude Switch to that user: su - claude Install Required Dependencies Install Node.js (LTS) Use NodeSource: curl -fsSL https://deb.nodesource.com/setup_lts.x | sudo -E bash - sudo apt install -y nodejs Verify: node -v npm -v Obtain Claude API Access You will need: API key from Anthropic Model name (e.g., claude-3-7-sonnet-latest) Register and manage keys via: Anthropic Store your API key securely. Create Claude Code Application Create Project Directory mkdir ~/claude-app cd ~/claude-app Initialize Project npm init -y npm install express axios dotenv Create Application Server Create server.js: import express from "express"; import axios from "axios"; import dotenv from "dotenv"; dotenv.config(); const app express(); app.use(express.json()); app.post("/ask", async (req, res) > { try { const response await axios.post( "https://api.anthropic.com/v1/messages", { model: "claude-3-7-sonnet-latest", max_tokens: 1000, messages: [ { role: "user", content: req.body.prompt } ] }, { headers: { "x-api-key": process.env.CLAUDE_API_KEY, "anthropic-version": "2023-06-01", "content-type": "application/json" } } ); res.json(response.data); } catch (err) { res.status(500).json({ error: err.message }); } }); app.listen(3000, () > { console.log("Claude app running on port 3000"); }); Environment Configuration Create .env file: CLAUDE_API_KEYyour_api_key_here Restrict permissions: chmod 600 .env Enable ES Modules Edit package.json and add: "type": "module" Test Application node server.js Test locally: curl -X POST http://localhost:3000/ask \ -H "Content-Type: application/json" \ -d '{"prompt":"Explain zero-trust architecture"}' Install Nginx Reverse Proxy sudo apt install nginx -y Create config: sudo nano /etc/nginx/sites-available/claude Example config: server { listen 80; server_name yourdomain.com; location / { proxy_pass http://localhost:3000; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection 'upgrade'; proxy_set_header Host $host; } } Enable site: sudo ln -s /etc/nginx/sites-available/claude /etc/nginx/sites-enabled/ sudo nginx -t sudo systemctl restart nginx Secure with SSL (Let’s Encrypt) Install Certbot: sudo apt install certbot python3-certbot-nginx -y Run: sudo certbot --nginx -d yourdomain.com Certificates issued via: Let's Encrypt Auto-renewal is installed automatically. Create Systemd Service Create: sudo nano /etc/systemd/system/claude.service DescriptionClaude Code App Afternetwork.target Userclaude WorkingDirectory/home/claude/claude-app ExecStart/usr/bin/node server.js Restartalways EnvironmentNODE_ENVproduction WantedBymulti-user.target Enable service: sudo systemctl daemon-reload sudo systemctl enable claude sudo systemctl start claude Check status: sudo systemctl status claude Firewall Configuration Enable UFW: sudo ufw allow OpenSSH sudo ufw allow 'Nginx Full' sudo ufw enable Optional Production Enhancements Add Rate Limiting Install: npm install express-rate-limit Add Logging npm install morgan Run with PM2 (Alternative to Systemd) sudo npm install -g pm2 pm2 start server.js pm2 startup pm2 save Scaling Considerations For heavier production workloads: Deploy behind Cloudflare Use Redis caching layer Use horizontal scaling via load balancer Implement request queue to prevent API exhaustion Security Best Practices Never expose API key client-side Use environment variables only Restrict IP access if internal tool Enable automatic OS security updates Monitor logs via journalctl -u claude Deployment Complete You now have: Ubuntu VPS Node-based Claude backend Reverse proxy SSL encryption Persistent service Firewall enabled Conclusion You now know how to deploy Claude Code on Ubuntu VPS.

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