Retain So MCP

Name: Retain So MCP
Author: retain-so

by retain-soversion 0.1.2i★ –iRuns on your computer

Registry nameio.github.retain-so/mcp-server

Install

Overview

Description from the maker (original English)

Model Context Protocol server for Retain: let AI agents query churn risk and act on retention.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other
You need to fill in: RETAIN_API_KEY

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: RETAIN_API_KEY

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "retain-so": {
      "command": "npx",
      "args": [
        "-y",
        "@retain-so/mcp-server"
      ],
      "env": {
        "RETAIN_API_KEY": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add retain-so --env RETAIN_API_KEY=your-value -- npx -y @retain-so/mcp-server

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "retain-so": {
      "command": "npx",
      "args": [
        "-y",
        "@retain-so/mcp-server"
      ],
      "env": {
        "RETAIN_API_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "retain-so": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@retain-so/mcp-server"
      ],
      "env": {
        "RETAIN_API_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

RETAIN_API_KEY secret required env
Your API key from Retain

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account retain-so, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 18354 servers in this category
Published to the registry more recently than 10% of the other 18354 servers in this category
Basic checks equal to or better than 100% of the other 18354 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Retain So MCP safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: RETAIN_API_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.2) reached the registry 5 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Qemu MCP

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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Runs on your computer★ 440MITUpdated 14 months ago

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Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

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Boot and drive QEMU VMs from an AI agent: keys, screenshots, serial. No guest agent.

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Retain MCP Server

Let your AI agent see who is about to churn, and do something about it.

@retain-so/mcp-server connects Retain to any MCP client (Claude Code, Claude Desktop, Cursor, Windsurf, and friends). Ask in natural language which customers are at risk, pull a customer's full health profile, check MRR at risk, and log outreach, all without opening the dashboard.

Retain is an AI-first churn prevention and customer analytics platform. This server is the bridge between your agent and your Retain data.

What you can ask your agent to do

Read:

"Which customers are at critical risk this week?"
"Show me my high-risk customers ordered by MRR."
"What's my total MRR at risk, broken down by risk level?"
"Pull the full profile for Acme Inc."
"List the active alerts I haven't contacted yet."
"Summarize this month's churn metrics and net revenue retention."

Act (needs a read+write key):

"Mark the alert for Globex as contacted."
"Archive the resolved alert for Initech."

Setup (under 5 minutes)

In Retain, go to Settings → Agent keys and create a key. Pick read for query-only, or read & write to let the agent take actions. Copy it (it is shown once).
Add the snippet for your client below.
Restart the client and ask your first question.

Claude Code

claude mcp add retain --env RETAIN_API_KEY=rk_agent_xxx -- npx -y @retain-so/mcp-server

Claude Desktop (`claude_desktop_config.json`)

"mcpServers": { "retain": { "command": "npx", "args": ["-y", "@retain-so/mcp-server"], "env": { "RETAIN_API_KEY": "rk_agent_xxx" } } } }

Cursor / Windsurf (`.cursor/mcp.json` or `~/.codeium/windsurf/mcp_config.json`)

"mcpServers": { "retain": { "command": "npx", "args": ["-y", "@retain-so/mcp-server"], "env": { "RETAIN_API_KEY": "rk_agent_xxx" } } } }

Tools

Tool	Type	What it does
`get_at_risk_customers`	read	Customers by churn risk (`Critical`/`High`/`Stable`/`Healthy`), ordered by MRR. Defaults to Critical + High.
`get_customer_details`	read	Full profile for one customer by id or name.
`get_mrr_at_risk`	read	Total MRR at risk plus active-alert counts by risk level.
`get_active_alerts`	read	Active alerts by priority, with risk factors and outreach state.
`get_churn_metrics`	read	Churn rate, MRR churned, expansion/contraction, net revenue retention.
`mark_alert_contacted`	write	Mark an alert as contacted.
`archive_alert`	write	Archive a resolved alert.

Coming soon: send_retention_email (trigger a templated retention email).

Example conversation

You: Who's about to churn and how much money is on the line?

Agent: _(calls get_mrr_at_risk, then get_at_risk_customers)_ You have $4,200 MRR at risk across 7 active alerts. The two biggest are Acme Inc ($900, critical, 18 days inactive) and Globex ($650, high).

You: I emailed Acme today, mark their alert as contacted.

Agent: _(calls mark_alert_contacted)_ Done. Acme's alert is now marked as contacted.

Configuration

Variable	Required	Default	Description
`RETAIN_API_KEY`	yes	(none)	Agent key from Settings → Agent keys.
`RETAIN_API_URL`	no	`https://api.retain.so`	Override the API base URL (self-host / staging).

Development

npm install

npm run dev # run from source with tsx npm run build # bundle to dist/ npm run typecheck

The server holds no business logic and no database. It only translates MCP tool calls into HTTP requests against Retain's public /agent/* API. Contributions and new tools are welcome.

License

MIT

Retain So MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Qemu MCP

README from the maker

Retain MCP Server

What you can ask your agent to do

Setup (under 5 minutes)

Claude Code

Claude Desktop (claude_desktop_config.json)

Cursor / Windsurf (.cursor/mcp.json or ~/.codeium/windsurf/mcp_config.json)

Tools

Example conversation

Configuration

Development

License

Claude Desktop (`claude_desktop_config.json`)

Cursor / Windsurf (`.cursor/mcp.json` or `~/.codeium/windsurf/mcp_config.json`)