AI API Security: Best Practices for Production

Security Matters

AI APIs handle sensitive data — user prompts, business logic, and sometimes personal information. A leaked API key or an unprotected endpoint can lead to unexpected bills, data exposure, or abuse.

Here are the practices every team should follow.

1. Never Expose API Keys in Client Code

This is the most common mistake. Never include your XVAPI key in frontend JavaScript, mobile apps, or public repositories.

// WRONG — key exposed to anyone who opens DevTools
const response = await fetch('https://api.xvapi.com/v1/chat/completions', {
  headers: { 'Authorization': 'Bearer sk-live-abc123...' }
});

// RIGHT — proxy through your backend
const response = await fetch('/api/ai/chat', {
  method: 'POST',
  body: JSON.stringify({ message: userInput })
});

Always route AI requests through your own backend, where the API key stays server-side.

2. Implement Rate Limiting

Protect your budget and your backend:

• Per-user limits — Prevent any single user from making excessive requests
• Per-minute caps — Guard against automated abuse
• Budget alerts — Set spending thresholds in your XVAPI dashboard

3. Validate and Sanitize Input

User prompts should be treated like any other user input:

• Set maximum prompt length
• Strip or escape special characters if embedding user input into system prompts
• Use a system prompt to define model behavior boundaries

MAX_PROMPT_LENGTH = 4000

def sanitize_prompt(user_input: str) -> str:
    return user_input[:MAX_PROMPT_LENGTH].strip()

4. Use Separate Keys for Environments

Maintain separate API keys for:

• Development — Low rate limits, test models
• Staging — Production-like settings, moderate limits
• Production — Full limits, monitoring enabled

This way, a compromised dev key doesn't affect production.

5. Monitor Usage Anomalies

Watch for sudden spikes in:

• Request volume
• Token consumption
• Error rates
• New model usage (someone testing unauthorized models)

XVAPI's dashboard provides real-time usage analytics to help catch anomalies early.

6. Rotate Keys Regularly

Set a rotation schedule — quarterly at minimum. When rotating:

1. Generate a new key
2. Update your deployment
3. Verify the new key works
4. Revoke the old key

Summary

Security isn't optional for production AI systems. Start with these fundamentals, and you'll avoid the most common pitfalls.