01
Add or register domains
Group every client under its own workspace, then import domains or register new campaign domains.
Cold email infrastructure for outbound agencies
Scale client campaigns without duct-taping inbox ops together.
GTM Inboxes gives agencies an API-first control plane for domains, DNS, inboxes, SMTP credentials, readiness checks, deliverability monitoring, and sequencer exports.
New to the API? Start with the agency quickstart or point automation at llms.txt.
Clients
workspace-isolated
Inboxes
readiness-gated
Exports
sequencer-ready
agency-launch.json
{
"workspace": "acme-client",
"domain": "tryacme-mail.com",
"dns": "verified",
"inboxes": 25,
"smtpReadiness": "pass",
"exportTarget": "Smartlead",
"blockedRows": 0
}API-first workflows for teams, scripts, and AI agents
Workspace isolation for agencies managing many clients
SMTP credentials and readiness surfaced before sequencer export
Monitoring hooks for DNS, blacklist, warmup, and infrastructure health
02
Provision DNS and inboxes
Configure Cloudflare DNS, DKIM, SPF, DMARC, inbox records, and SMTP credentials from one control plane.
03
Prove readiness before export
Use SMTP readiness, smoke-test history, and deliverability monitoring before pushing inboxes to sequencers.
04
Operate at agency scale
Track alerts, credentials, integrations, warmup status, and client-isolated infrastructure without spreadsheet ops.
Why agencies switch
One control plane for the work that usually gets split across vendors, spreadsheets, and Slack threads.
Available now
- Workspace, domain, inbox, and API-key management
- SMTP package and capacity calculator
- Cloudflare DNS setup and validation workflows
- Redacted SMTP credential metadata with readiness signals
- Smartlead, Instantly, and EmailBison integration surfaces
- Public provider comparisons and safe battlecards
- Agent-readable docs and llms.txt for automation
Coming soon
- Operator playbooks for replacement and escalation
- CLI workflows for agency inbox operations
- Expanded automation around support and remediation
Build your next client launch on infrastructure you can operate by API.
Start in the dashboard, then automate the repeatable work through the public API as your agency scales.