n8n - Connect StackOne

StackOne is in n8n’s built-in list of MCP servers, so an n8n AI Agent can use it after you sign in, with no URL to enter. On n8n versions without that list, add it with the MCP Client Tool node instead.

Before you start

A StackOne project you are a member of.
A connector profile in the project for each provider the client should reach, with the actions you want exposed enabled.
(Optional) A linked account for each provider. Accounts can also be linked during the consent flow.

Connect StackOne

From the MCP servers list
With the MCP Client Tool

Add StackOne to an agent

In a workflow, add an AI Agent node.
On the agent, click Tool +. In n8n’s agent builder, click Add Tool instead.
Search for StackOne, or open the MCP Servers section, and select StackOne.

If StackOne isn’t listed, your n8n version doesn’t have the MCP servers list. Use the With the MCP Client Tool tab.

n8n opens the StackOne sign-in and saves the result as an MCP credential.

Sign in to StackOne. In a desktop app or code editor, this opens in your browser.
If StackOne asks for a project, pick yours and click Continue to Accounts.
Pick the work systems n8n can use (your Linked Accounts).
If you see Load tools when needed, leave it on.
Click Authorize.

StackOne's Select accounts screen with two Linked Accounts ticked, Load tools when needed on, and the Authorize button

Choose the tools

Under Tools to include, pick all of StackOne’s tools, a selected list, or all except a selected list.

Add the MCP Client Tool

In a workflow, add an AI Agent node.
Under its tools, click + and search for MCP Client Tool.
Set URL to https://mcp.stackone.com/mcp.
Set the transport to HTTP Streamable. StackOne does not serve SSE, so an SSE endpoint will not connect.

Set Authentication to OAuth2, then complete the sign-in in the browser. n8n stores the result as a reusable credential.

Sign in to StackOne. In a desktop app or code editor, this opens in your browser.
If StackOne asks for a project, pick yours and click Continue to Accounts.
Pick the work systems n8n can use (your Linked Accounts).
If you see Load tools when needed, leave it on.
Click Authorize.

If your n8n version doesn’t offer OAuth2 on this node, use a token app URL instead. See token apps.

Test the connection

Click Execute Step to check the connection and see the available tools, then pick what the workflow needs from Tools to include.

An OAuth grant belongs to the person who approved it, and n8n workflows usually run unattended long after that. A token app URL is often the better fit for a scheduled workflow, since it carries its own credential and doesn’t depend on one person’s grant.

Add or change accounts

n8n reaches only the Linked Accounts you approved when you connected. To add one you link later, or one someone shares with you afterwards:

Open Connected Apps

In the StackOne dashboard, go to Connected Apps.

Edit the connection

Open the ⋮ menu on the row for n8n and select Edit tool access.
Select the Linked Account.
Click Save changes.

To review or revoke the connection, use the same ⋮ menu in Connected Apps.