Clay Security Basics

Overview

Security best practices for Clay integrations covering API key management, webhook endpoint security, provider credential isolation, and lead data protection. Clay handles sensitive PII (emails, phone numbers, LinkedIn profiles) at scale, making security critical.

Prerequisites

Clay account with admin access
Understanding of environment variables and secrets management
Access to deployment platform's secrets manager

Instructions

Step 1: Secure API Key Storage

# .env (NEVER commit to git)
CLAY_API_KEY=clay_ent_your_api_key_here
CLAY_WEBHOOK_URL=https://app.clay.com/api/v1/webhooks/your-id

# .gitignore — add these patterns
.env
.env.local
.env.*.local
*.key

For production, use your platform's secrets manager:

# GitHub Actions
gh secret set CLAY_API_KEY --body "clay_ent_your_key"

# Google Cloud Secret Manager
echo -n "clay_ent_your_key" | gcloud secrets create clay-api-key --data-file=-

# AWS Secrets Manager
aws secretsmanager create-secret \
  --name clay/api-key \
  --secret-string "clay_ent_your_key"

Step 2: Authenticate Incoming Webhook Callbacks

When Clay's HTTP API columns call your endpoint, validate the request origin:

// src/middleware/clay-auth.ts
import crypto from 'crypto';

const CLAY_WEBHOOK_SECRET = process.env.CLAY_WEBHOOK_SECRET!;

function verifyClayCallback(
  payload: string,
  signature: string | undefined
): boolean {
  if (!signature || !CLAY_WEBHOOK_SECRET) return false;

  const expected = crypto
    .createHmac('sha256', CLAY_WEBHOOK_SECRET)
    .update(payload)
    .digest('hex');

  return crypto.timingSafeEqual(
    Buffer.from(signature, 'hex'),
    Buffer.from(expected, 'hex')
  );
}

// Express middleware
function clayAuthMiddleware(req: any, res: any, next: any) {
  const signature = req.headers['x-clay-signature'] as string;
  const rawBody = JSON.stringify(req.body);

  if (!verifyClayCallback(rawBody, signature)) {
    console.warn('Rejected unauthorized Clay callback from', req.ip);
    return res.status(401).json({ error: 'Invalid signature' });
  }
  next();
}

Step 3: Isolate Provider API Keys

Connect provider keys directly in Clay (Settings > Connections) rather than passing them through your application. This keeps provider credentials out of your codebase:

Provider	Where to Store Key	Why
Apollo	Clay Settings > Connections	0 credits when using own key
Clearbit	Clay Settings > Connections	0 credits when using own key
Hunter.io	Clay Settings > Connections	0 credits when using own key
HubSpot	Clay Settings > Connections	CRM sync uses Clay's OAuth
Salesforce	Clay Settings > Connections	CRM sync uses Clay's OAuth

Step 4: API Key Rotation Procedure

# 1. Generate new key in Clay Settings > API
# 2. Update all integrations with new key
# 3. Test connectivity
curl -s -X POST "https://api.clay.com/v1/people/enrich" \
  -H "Authorization: Bearer $NEW_CLAY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"email": "test@example.com"}' | jq .status

# 4. Once confirmed working, revoke old key in Clay dashboard
# 5. Update deployment secrets
gh secret set CLAY_API_KEY --body "$NEW_CLAY_API_KEY"

Step 5: Protect Enriched Lead Data

// src/clay/data-protection.ts
const PII_FIELDS = ['email', 'phone', 'personal_email', 'home_address', 'linkedin_url'];

/** Strip PII from enriched data before logging or analytics */
function redactPII(row: Record<string, unknown>): Record<string, unknown> {
  const redacted = { ...row };
  for (const field of PII_FIELDS) {
    if (field in redacted) {
      redacted[field] = '[REDACTED]';
    }
  }
  return redacted;
}

/** Hash email for deduplication without storing plaintext */
function hashEmail(email: string): string {
  return crypto.createHash('sha256').update(email.toLowerCase().trim()).digest('hex');
}

// Usage: log enriched data safely
console.log('Enriched:', redactPII(enrichedRow));

Step 6: Security Checklist

Error Handling

Security Issue	Detection	Mitigation
API key in git history	`git log -p --all -S 'clay_ent_'`	Rotate key immediately, use BFG to scrub
Unauthorized webhook calls	Missing signature validation	Add HMAC verification middleware
Over-permissioned users	Viewers running enrichments	Audit roles in Settings > Members
PII in application logs	grep logs for email patterns	Add PII redaction to log pipeline

Resources

Next Steps

For production deployment, see clay-prod-checklist.