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Headless API · email playbook

Campaigns and sequences delivered same-day

A campaigns and sequences delivered same-day playbook for Agencies & Freelancers, built headless api. Starting from a client needs an ongoing program, 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 + MCP

Trigger

A client needs an ongoing program

Agencies & Freelancers

Design engine

Mailable

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

mailchimp
klaviyo
segment
zapier

Sends to

Client ESPs

Client brand kits

Analytics

How the flow works

Trigger: A client needs an ongoing program

  1. 1

    Build reusable sequences once per client

  2. 2

    Mailable keeps every send on the client’s brand

  3. 3

    Schedule recurring issues and promos

  4. 4

    Branded, client-facing result summaries

Who runs it

  • Account & strategy
  • Designers
  • Agency owners

Integrations

mailchimp
klaviyo
segment
zapier

Synced from your stack; designs stay on-brand by default.

Build mode & destinations

Built via the headless API + MCP

Client ESPs

Client brand kits

Analytics

What keeps it on-brand & on-track

  • Take on more email work without more headcount
  • Consistent quality across the roster
  • Reusable flows per client

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.

Describe it. Ship beautiful email.

Start free, or talk to us about designing email at scale through the editor and the headless API.