The API for
Email Infrastructure
Send notifications, verification codes, and marketing campaigns with a simple JSON payload.
Metered Billing
Only pay for what you send. Our credit-based system ensures you never overpay for your email infrastructure.
1 Credit = 1 Email
Every recipient counts as one credit. No hidden fees or monthly minimums for the API.
Bulk Discounts
Credits start at $0.001 per email. Volume discounts apply automatically for high-scale users.
Core Endpoint Reference
Every request must include the X-API-Key header for authentication.
Send an email programmatically. Requires 1 credit per recipient.
List all mailboxes under your domain.
Generate a new API key.
Retrieve your API usage logs and credit balance.
Important: Webhook Security
Always verify the signature header when receiving webhooks from HiheMAX Mail to ensure the requests are authentic. Refer to the Webhook Guide for implementation details.