MCP server · API · official

One MCP server

by withoneai · official

Let your AI work with Gmail, Slack, Stripe, Notion, GitHub and hundreds more apps through one connection.

One MCP server is made by a company called One. It connects your AI assistant to over 700 apps like Gmail, Slack, Notion, Stripe and GitHub, so you can ask your AI to do things there for you. It is handy if you use several work apps and want one place where your AI can reach all of them.

What is an MCP server? The 30-second version

On its own, your AI can only chat with you. An MCP server is a small helper that gives your AI a new skill or a connection to an app. This one connects your AI to many work apps through One, so the AI can look things up or take actions there when you ask. You do not need to set up each app one by one; One handles the sign-ins for you.

What this MCP server does

You ask your AI something like "get my last 5 emails from Gmail". The AI uses this helper to find the right action in One and runs it. One talks to Gmail on your behalf and sends the result back. Your AI then shows you the answer in the chat, for example a list of emails or a confirmation that a message was sent.

Flow diagram: you ask your AI “Get my last 5 emails from Gmail”, the One MCP server reaches Gmail, Slack, Stripe, Notion and GitHub, and you get back answer in your chat.

Click to zoom

What you can do with it

Read your recent emails from Gmail
Send a message to a Slack channel
List products from your Shopify store
Fetch invoices from QuickBooks
Create a form or dashboard that uses Gmail or Linear
Look up actions across many apps in one request
Run an action on a connected app

Try asking your AI

“Get my last 5 emails from Gmail”
“Send a Slack message to #general: Meeting in 10 minutes”
“Get all products from my Shopify store”
“Build a dashboard that displays Linear users and their assigned projects”

What it gives back to you

You get answers in the chat, like a list of emails, a confirmation that a message was sent, or a summary of data from an app. If you ask for code, it can write a small piece of code for you. It can also show you which apps are connected and what your AI is allowed to do there.

Before you start

What you need

A One account (you get an API key from the One dashboard)
An AI assistant that supports MCP, like Claude Desktop, Cursor or Windsurf
For the remote version: just the URL and a browser to sign in

Good to know

This helper can read and change things in your connected apps, like sending emails or messages, so make sure you trust the AI and check what it is about to do.

Install it with your AI

Add One MCP server to your AI, no technical skills needed

You don't install anything by hand. You copy one prompt, paste it into an AI that can work on your computer, and it checks, installs and connects the server for you, asking you when it needs something.

Sign in to get the install prompt

Members get a ready-made prompt that lets the Claude desktop app check One MCP server, install it and connect it for them, step by step. You don't need any technical skills: you copy, paste and answer a few questions. Your connected AI can also find and install any of the 4,066 MCP servers here for you.