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Headless API · email playbook

Multi-step outbound cadences with follow-ups written for you

A multi-step outbound cadences with follow-ups written for you playbook for Sales & Outbound, built headless api. Starting from a prospect goes quiet mid-sequence, Mailable designs every on-brand email in the flow and ships it through crm and the tools you already use - inbox-ready in every client.

Headless APIBuild mode: Built via the headless API + MCP

Trigger

A prospect goes quiet mid-sequence

Sales & Outbound

Design engine

Mailable

Mailable

prompt → on-brand email

Brand kit

colors · fonts · voice

Who runs it

Build mode

Built via the headless API + MCP

SDRs & AEs

team

RevOps

team

Founders

team

Integrations

Synced via API & MCP

salesforce
segment
zapier
webhook

Sends to

CRM

Sequencer

Calendar

How the flow works

Trigger: A prospect goes quiet mid-sequence

  1. 1

    Mailable writes and designs the next on-brand follow-up step

  2. 2

    It branches on opens and clicks to pick the right angle

  3. 3

    A final break-up email is generated to prompt a yes or no

  4. 4

    Replies route back to the rep in the CRM

Who runs it

  • SDRs & AEs
  • RevOps
  • Founders

Integrations

salesforce
segment
zapier
webhook

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

Build mode & destinations

Built via the headless API + MCP

CRM

Sequencer

Calendar

What keeps it on-brand & on-track

  • Cadence and timing you control, written for you
  • Branching on real engagement signals
  • On-brand, even on step five

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.