Headless API · email playbookOnboarding and activation sequences
A onboarding and activation sequences playbook for SaaS & Startups, built headless api. Starting from a user signs up or starts a trial, Mailable designs every on-brand email in the flow and ships it through product events and the tools you already use - inbox-ready in every client.
Headless APIBuild mode: Built via the headless API + MCPTrigger
A user signs up or starts a trial
SaaS & Startups
Design engine
Mailable
prompt → on-brand email
Brand kit
colors · fonts · voice
Who runs it
Build mode
Built via the headless API + MCP
Growth & lifecycle
team
Product teams
team
Founders
team
Integrations
Synced via API & MCP
Sends to
Product events
CRM
Data warehouse
How the flow works
Trigger: A user signs up or starts a trial
- 1
Mailable designs a welcome email and a multi-step activation sequence
- 2
Each step nudges toward the next milestone toward the aha moment
- 3
It skips anyone who has already activated
- 4
Triggered straight from your product via the API
Who runs it
- Growth & lifecycle
- Product teams
- Founders
Integrations
Synced from your stack; designs stay on-brand by default.
Build mode & destinations
Built via the headless API + MCP
Product events
CRM
Data warehouse
What keeps it on-brand & on-track
- Triggered from product events, on your schedule
- On-brand, not plain-text transactional
- Designed and sent via the headless API
Headless API
Your product or an LLM agent calls the Mailable API (or MCP server) to design and send this flow programmatically - on-brand, inbox-ready HTML, no browser required.
More SaaS & Startups playbooks
Describe it. Ship beautiful email.
Start free, or talk to us about designing email at scale through the editor and the headless API.