Infrabox

Infrabox provisions cold-email sending infrastructure on demand: real domains, Google Workspace and Microsoft mailboxes, DNS/DMARC/SPF setup, warmup, and ongoing deliverability monitoring (InfraGuard). Everything you can do from the dashboard — buy a domain, spin up mailboxes, connect them into a sending tool, monitor blacklists — is also available as a REST API, so you can automate provisioning at whatever scale your outbound program needs.

This site documents that API for developers. It does not cover internal, admin, or account-session-only endpoints — only the stable /v1/api/* surface meant for integrations.

What you can build

• Bulk mailbox provisioning — buy domains and mailboxes programmatically instead of clicking through the dashboard one at a time. See Orders and Mailboxes.
• Bulk-connect mailboxes into your sequencer — take mailboxes Infrabox has provisioned for you and import them in bulk into a cold-email sending tool (Smartlead, Instantly, Lemlist, and others) without copying SMTP/IMAP credentials by hand. See Sequencers.
• Deliverability automation — enable blacklist/DNS/bounce monitoring on your domains and react to alerts programmatically. See InfraGuard.
• Domain & DNS lifecycle — search, register, renew, and manage DNS/DMARC/forwarding for sending domains. See Domains and Cloudflare Domains.