Everything a developer needs to integrate GO MAILBOX in an afternoon.
Authenticate with a header, POST JSON, get JSON back. No SDK required — anything that can make an HTTP request can use it.
Send X-Api-Key with every request. Generate keys in your dashboard.
Add a contact to a list, including custom fields.
Send a one-off email from your verified domain.
Retrieve your lists with live subscriber counts.
Free 14-day trial on managed or self-hosted plans. No credit card required.
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