Headless API · email playbookPer-client brand kits with locked guardrails
A per-client brand kits with locked guardrails playbook for Agencies & Freelancers, built headless api. Starting from a client brief lands, Mailable designs every on-brand email in the flow and ships it through client esps and the tools you already use - inbox-ready in every client.
Headless APIBuild mode: Built via the headless API + MCPTrigger
A client brief lands
Agencies & Freelancers
Design engine
Mailable
prompt → on-brand email
Brand kit
colors · fonts · voice
Who runs it
Build mode
Built via the headless API + MCP
Account & strategy
team
Designers
team
Agency owners
team
Integrations
Synced via API & MCP
Sends to
Client ESPs
Client brand kits
Project tools
How the flow works
Trigger: A client brief lands
- 1
Switch to the client’s brand kit in a click
- 2
Mailable designs the campaign on-brand, same day
- 3
Refine to the client’s notes by chatting or nudging blocks
- 4
Deliver white-labeled, or export clean HTML
Who runs it
- Account & strategy
- Designers
- Agency owners
Integrations
Synced from your stack; designs stay on-brand by default.
Build mode & destinations
Built via the headless API + MCP
Client ESPs
Client brand kits
Project tools
What keeps it on-brand & on-track
- Per-client brand kits with locked guardrails
- Same-day turnaround without the design grind
- Nothing off-brand ever ships
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 Agencies & Freelancers playbooks
Describe it. Ship beautiful email.
Start free, or talk to us about designing email at scale through the editor and the headless API.