Secure credential management
API keys must be managed as high-security secrets: use only in environment variables, never hardcode in source code, rotate regularly (every 90 days).
Use a secrets manager for production credential management.
Customer data protection
Customer phone numbers are personal data subject to GDPR. Encrypt data at rest, use HTTPS for all API communications.
Implement a data retention policy.
Abuse protection
Implement application-level rate limiting to prevent accidental massive sending (code bugs). Add a maximum messages per user per period limit.
Compliance and auditing
Maintain a complete audit trail of all API operations: who sent what, when, to whom.
Perform periodic security reviews of your WhatsApp Business API implementation.
