For developers
Mailcore integrations
Contracts, examples, and secure integration guidance. Start with Email API or connect your business email.
HTTP API v1
Email API
Your first email, HTTP API, delivery statuses, and signed webhooks.
Read the documentation →MailcoreBusiness email
Connect a domain, configure DNS, manage mailboxes, and open webmail through your account.
Open account →OpenAPI / Postman
Import the contract into your development tools. Examples are plain code, not an official SDK.
OpenAPI 3.1Postman Collection