
Cold email infrastructure with unlimited warmup and a real API.
Smartlead ships an official MCP server (hosted at mcp.smartlead.ai/sse and documented in its help center) so agents can create campaigns and read replies, backed by a comprehensive REST API and webhooks deep enough to run an entire outbound program headless.
The verdict: The developer's choice for cold email infrastructure.
What's good
- Unlimited warmup and unlimited sending accounts across all plans
- Strong, well-documented API plus webhooks, a favorite of GTM engineers
- Master inbox for managing all replies in one place
What's not
- UI is dense and takes time to learn
- API and webhooks need an add-on on the two cheapest tiers; bundled from Unlimited Smart up
Pricing
From $32.50/mo (billed annually)















