Securing Your AI API Integration: A Developer's Checklist

Introduction

Integrating an AI API introduces new security considerations. API keys need protection, inputs need validation, and webhook payloads need verification. This checklist covers the essentials.

1. API Key Management

Never commit keys to source control. Use environment variables:

// GOOD
const apiKey = process.env.INSTANTAPI_KEY;

// BAD
const apiKey = "ia_live_abc123...";

Best practices:

• Store keys in environment variables or a secrets manager
• Add .env to .gitignore
• Rotate keys periodically from your dashboard
• Use separate keys for dev and production
• Revoke compromised keys immediately

2. Server-Side Only

Never expose your API key in client-side JavaScript:

app.post("/api/summarize", async (req, res) => {
  if (!req.user) return res.status(401).json({ error: "Unauthorized" });

  const response = await fetch("https://instantapis.net/api/v1/generate", {
    method: "POST",
    headers: {
      "Authorization": "Bearer " + process.env.INSTANTAPI_KEY,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({ task: "summarize", input: req.body.text }),
  });
  res.json(await response.json());
});

3. Input Validation

Validate and sanitize all user inputs before sending them to any API:

function validateInput(text) {
  if (typeof text !== "string") throw new Error("Input must be a string");
  if (text.trim().length === 0) throw new Error("Input cannot be empty");
  if (text.length > 100000) throw new Error("Input exceeds 100KB limit");
  return text.trim();
}

4. Webhook Signature Verification

Always verify webhook signatures before processing:

const crypto = require("crypto");

function verifySignature(payload, signature, secret) {
  const expected = crypto
    .createHmac("sha256", secret)
    .update(JSON.stringify(payload))
    .digest("hex");
  return crypto.timingSafeEqual(
    Buffer.from(signature),
    Buffer.from(expected)
  );
}

app.post("/webhooks/instantapi", (req, res) => {
  const sig = req.headers["x-instantapi-signature"];
  if (!verifySignature(req.body, sig, WEBHOOK_SECRET)) {
    return res.status(401).json({ error: "Invalid signature" });
  }
  res.json({ received: true });
});

5. Rate Limit Your Endpoints

Even though InstantAPI has rate limits, also limit your client-facing endpoints:

const rateLimit = require("express-rate-limit");
const aiLimiter = rateLimit({
  windowMs: 60 * 1000,
  max: 20,
  message: { error: "Too many requests" },
});
app.use("/api/ai/*", aiLimiter);

6. Monitor for Anomalies

Set up alerts for unusual patterns: sudden call spikes (compromised key), high error rates, calls from unexpected IPs. InstantAPI provides usage spike alerts and webhook notifications for credits.low and credits.depleted events.

Security Checklist

• API keys in environment variables
• .env in .gitignore
• API calls server-side only
• Input validation before API calls
• Webhook signatures verified
• Client endpoints rate limited
• Usage monitoring active
• HTTPS enforced
• Separate dev/prod keys
• Key rotation schedule set

Get started with InstantAPI on solid security foundations. Related:

• Webhook Tutorial
• Rate Limiting Best Practices