Postscript

Follow Postscript subscriber growth, opt-in sources and the texts you send.

Built by Postscript · connected through Trackian

Type: Agent only (Beta)
Setup: API key
AI agent: Read only
Category: Email and SMS marketing
Added: Sep 2026 · Beta

Overview

What is Postscript?

Postscript is an SMS marketing platform built for Shopify stores. Brands use it to grow a list of shoppers who opted in to texts, and to send them campaigns and automated messages.

What does it do?

Grows the list
Popups and keywords that collect opt-ins, with the source of every subscriber.
Sends texts
One-off campaigns and automated flows, with delays, splits and A/B tests.
Talks back
Two-way conversations with subscribers from a shared inbox.
Reports revenue
Revenue, list growth and message performance in its own dashboards.

Dashboard: revenue, subscribers and LTV
Flow builder: welcome series
App integrations

What Postscript adds to Trackian

Connecting Postscript lets your AI agent read your subscribers, keywords and sent messages through Trackian's MCP. It can see how your SMS list grows, where subscribers come from, and what you sent them, next to the store and ad data Trackian tracks.

What you get

List growth
New subscribers and opt-outs over time, with filters by date and subscription type.
Opt-in sources
Which keywords and popups bring subscribers in.
What was sent
The messages sent to subscribers, for checking a campaign against a sales spike.

Good to know

Postscript is an external connector in beta. Your AI agent reads it on demand through Trackian's MCP; its data does not appear in Trackian's own dashboards or Sentinel yet, and Trackian never writes to Postscript. Postscript's revenue and campaign reports live only in its own dashboard; its API does not expose them.

Before you connect

In Postscript, open Account → API, click Create Security Key Pair if you have none, and paste the Private key (it starts with sk_).

Related apps

Connect Postscript to Trackian

Your AI assistant reads it through Trackian's MCP, next to everything else you connect.

Connect Postscript

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