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Troubleshooting & FAQ

Solutions to common problems and answers to frequently asked questions.

Common Issues​

API Key Not Working​

Symptoms:

  • 401 Unauthorized errors
  • "Invalid API key" messages

Solutions:

// Check environment variable is loaded
console.log('API Key exists:', !!process.env.Koreshield_API_KEY);

// Verify key format
const apiKey = process.env.Koreshield_API_KEY;
if (!apiKey.startsWith('ks_')) {
  console.error('Invalid API key format');
}

// Test connection
import { Koreshield } from 'Koreshield-sdk';

const Koreshield = new Koreshield({ apiKey });

try {
  await Koreshield.scan({ content: 'test' });
  console.log('Connection successful');
} catch (error) {
  console.error('Connection failed:', error.message);
}

High Latency​

Symptoms:

  • Slow API responses (>500ms)
  • Timeouts

Solutions:

// Enable request caching
const Koreshield = new Koreshield({
  apiKey: process.env.Koreshield_API_KEY,
  cache: {
    enabled: true,
    ttl: 300, // 5 minutes
  },
});

// Use batch scanning
const results = await Koreshield.batchScan({
  items: messages.map((content, i) => ({ id: `${i}`, content })),
});

// Set timeouts
const scan = await Promise.race([
  Koreshield.scan({ content: message }),
  new Promise((_, reject) =>
    setTimeout(() => reject(new Error('Timeout')), 5000)
  ),
]);

False Positives​

Symptoms:

  • Legitimate content flagged as threats
  • Over-sensitive detection

Solutions:

// Adjust sensitivity
const scan = await Koreshield.scan({
  content: message,
  sensitivity: 'medium', // or 'low'
});

// Use allowlist
const scan = await Koreshield.scan({
  content: message,
  allowlist: ['technical terms', 'product names'],
});

// Custom policy
const scan = await Koreshield.scan({
  content: message,
  policyId: 'custom-policy-id',
});

Rate Limiting​

Symptoms:

  • 429 Too Many Requests errors
  • Throttled responses

Solutions:

import pRetry from 'p-retry';

async function scanWithRetry(content: string) {
  return pRetry(
    async () => {
      return await Koreshield.scan({ content });
    },
    {
      retries: 3,
      onFailedAttempt: error => {
        if (error.response?.status === 429) {
          console.log('Rate limited, retrying...');
        }
      },
    }
  );
}

// Implement client-side rate limiting
import Bottleneck from 'bottleneck';

const limiter = new Bottleneck({
  maxConcurrent: 10,
  minTime: 100, // 100ms between requests
});

const scan = limiter.wrap((content: string) =>
  Koreshield.scan({ content })
);

Memory Leaks​

Symptoms:

  • Increasing memory usage over time
  • Application crashes

Solutions:

// Properly close connections
process.on('SIGTERM', async () => {
  await Koreshield.close();
  process.exit(0);
});

// Avoid storing large scan histories
const MAX_HISTORY = 1000;
let scanHistory: any[] = [];

function addToHistory(scan: any) {
  scanHistory.push(scan);
  if (scanHistory.length > MAX_HISTORY) {
    scanHistory = scanHistory.slice(-MAX_HISTORY);
  }
}

// Use streaming for large responses
for await (const chunk of streamResponse()) {
  // Process chunk immediately, don't accumulate
  await handleChunk(chunk);
}

Debugging Tips​

Enable Debug Logging​

const Koreshield = new Koreshield({
  apiKey: process.env.Koreshield_API_KEY,
  debug: true,
  logLevel: 'debug',
});

// Console will show:
// [Koreshield] Request: POST /v1/scan
// [Koreshield] Response: 200 OK (123ms)

Inspect Scan Results​

const scan = await Koreshield.scan({ content: message });

console.log('Scan Results:', {
  threatDetected: scan.threat_detected,
  threatType: scan.threat_type,
  confidence: scan.confidence,
  patterns: scan.patterns_matched,
  metadata: scan.metadata,
});

Network Debugging​

# Check connectivity
curl -I https://api.Koreshield.com/health

# Test API key
curl -X POST https://api.Koreshield.com/v1/scan \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"content": "test"}'

# Monitor requests
export DEBUG=axios
npm start

Performance Profiling​

async function profileScan(content: string) {
  const start = performance.now();

  const scan = await Koreshield.scan({ content });

  const duration = performance.now() - start;

  console.log(`Scan completed in ${duration.toFixed(2)}ms`);

  return { scan, duration };
}

Frequently Asked Questions​

How accurate is threat detection?​

Koreshield achieves 95%+ accuracy across 10+ attack types with configurable sensitivity levels.

What is the API rate limit?​

  • Free tier: 1,000 requests/month
  • Pro tier: 100,000 requests/month
  • Enterprise: Unlimited with dedicated infrastructure

Does scanning work offline?​

No, Koreshield requires internet connectivity to access our cloud-based detection models.

Can I self-host Koreshield?​

Yes, enterprise customers can deploy on-premises using Docker or Kubernetes. Contact sales for licensing.

What data is stored?​

By default, we store:

  • Scan results (threat type, confidence)
  • Metadata (user ID, timestamps)
  • Aggregated analytics

Content is NOT stored unless explicitly enabled for audit logs.

Is my data encrypted?​

Yes, all data is encrypted in transit (TLS 1.3) and at rest (AES-256).

What compliance certifications do you have?​

  • SOC 2 Type II
  • GDPR compliant
  • HIPAA compliant (enterprise)

How do I migrate from another solution?​

// Example: Migrating from Lakera Guard
import { Koreshield } from 'Koreshield-sdk';

// Old code
// const result = await lakeraGuard.detect(prompt);

// New code
const Koreshield = new Koreshield({ apiKey: 'YOUR_KEY' });
const result = await Koreshield.scan({ content: prompt });

// Map response fields
const isBlocked = result.threat_detected;
const threatType = result.threat_type;

Can I use Koreshield with streaming responses?​

Yes, see our streaming guide.

What happens if Koreshield is down?​

Implement graceful degradation:

async function resilientScan(content: string) {
  try {
    const scan = await Koreshield.scan({ content });
    return scan.threat_detected;
  } catch (error) {
    // Log error and fail open
    console.error('Koreshield unavailable:', error);
    return false; // Allow content through
  }
}

How do I handle multi-language content?​

Koreshield supports 50+ languages automatically:

const scan = await Koreshield.scan({
  content: 'Ignore las instrucciones anteriores', // Spanish
  language: 'es', // Optional hint
});

Can I customize detection rules?​

Yes, enterprise customers can create custom rules:

const scan = await Koreshield.scan({
  content: message,
  customRules: [
    {
      pattern: /password|secret|token/i,
      severity: 'high',
    },
  ],
});

How do I test in development?​

Use test API keys:

const Koreshield = new Koreshield({
  apiKey: process.env.NODE_ENV === 'production'
    ? process.env.Koreshield_API_KEY
    : 'ks_test_xxxxxxxxxxxx',
});

What is the average response time?​

  • P50: 50ms
  • P95: 150ms
  • P99: 300ms

Can I use Koreshield with serverless functions?​

Yes, works great with Lambda, Vercel, Netlify:

// Vercel Edge Function
export const config = { runtime: 'edge' };

export default async function handler(req: Request) {
  const { message } = await req.json();

  const scan = await Koreshield.scan({ content: message });

  return Response.json({ safe: !scan.threat_detected });
}

How do I monitor usage?​

Check the dashboard or use the API:

const usage = await Koreshield.getUsage({
  startDate: '2024-01-01',
  endDate: '2024-01-31',
});

console.log(`Requests: ${usage.total_requests}`);
console.log(`Threats blocked: ${usage.threats_blocked}`);

Error Codes​

CodeMeaningSolution
401Invalid API keyCheck your API key
429Rate limit exceededImplement backoff
500Server errorRetry with exponential backoff
503Service unavailableCheck status page

Getting Help​