A: Yes, Mailcheck.co can absolutely be used to serve your customers — whether you’re running an agency, SaaS platform, or internal tool. Our service is flexible and supports both organizational use and customer-facing use cases.

You can generate unique API keys for different projects or customers, allowing you to easily track usage separately. This makes it simple to monitor usage, apply rate limits, or segment billing internally if needed.

Additionally, our system supports integrations and webhook-based workflows so you can plug Mailcheck into your own infrastructure seamlessly.

If you have a specific implementation in mind, feel free to reach out — we’re happy to help you set it up!