> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stackone.com/llms.txt
> Use this file to discover all available pages before exploring further.

# LangSmith Fleet - Connect StackOne

> Use the StackOne MCP server to connect your work systems to LangSmith Fleet.

Recommended Set up with your agentCopy this into any AI assistant. It guides you one step at a time.

Help me connect StackOne to LangSmith Fleet. Read the setup guide at [https://docs.stackone.com/ai-platforms/setup-guide.md](https://docs.stackone.com/ai-platforms/setup-guide.md) and guide me one step at a time.
Copy

Or follow the steps yourself

## Connect

Are you adding StackOne to an agent you built, or using one a teammate shared with you?

> [tab] My own agent
>
> **1. Connect StackOne**
>
> 1. In Fleet, go to **Integrations**.
> 2. Search for **StackOne** and click **Connect**.
>
> ![LangSmith Fleet's Integrations page searched for StackOne, with the StackOne card and its Connect button](https://mintcdn.com/stackone-60/RgaE_4ZxFuvAQ6gS/images/ai-platforms/langchain/langsmith-fleet-integrations-stackone.png?fit=max\&auto=format\&n=RgaE_4ZxFuvAQ6gS\&q=85\&s=7b5068e543aea5caf82f2a76a77e0740)
>
> > [accordion] StackOne isn't there
> >
> > Ask your LangSmith workspace admin to add it. Send them this:
> >
> > ```text theme={null}
> > Can you add StackOne to LangSmith Fleet for our workspace, as a custom MCP server?
> > ```
> >
> > If your role lets you add MCP servers, you can add it to your own agent instead. Open the agent, click **Configure**, expand **Connections**, click **Add connection**, then **+ Add custom MCP**. Name it `StackOne`, choose **OAuth 2.1 (Auto)** for authentication, and use this URL:
> >
> > ```text theme={null}
> > https://mcp.stackone.com/mcp
> > ```
>
> **2. Sign in and authorize**
>
> 1. Sign in to StackOne. In a desktop app or code editor, this opens in your browser.
> 2. If StackOne asks for a project, pick yours and click **Continue to Accounts**.
> 3. Pick the work systems LangSmith Fleet can use (your Linked Accounts).
> 4. If you see **Load tools when needed**, leave it on.
> 5. Click **Authorize**.
>
> ![StackOne's Select accounts screen with two Linked Accounts ticked, Load tools when needed on, and the Authorize button](https://mintcdn.com/stackone-60/RgaE_4ZxFuvAQ6gS/images/ai-platforms/oauth-consent-select-accounts.png?fit=max\&auto=format\&n=RgaE_4ZxFuvAQ6gS\&q=85\&s=66ef4eb4d8bf6e5246e5f01ec959c187)
>
> Back in Fleet, StackOne shows as **Connected**.
>
> **3. Add it to your agent**
>
> 1. Open your agent and click **Configure**.
> 2. Expand **Connections** and click **Add connection**.
> 3. Select **StackOne**. If Fleet asks which account to use, pick the one you just connected.
> 4. Click **Save changes**.
>
> ![LangSmith Fleet's Add connection dialog with StackOne listed among the workspace's MCP servers and its Add button](https://mintcdn.com/stackone-60/RgaE_4ZxFuvAQ6gS/images/ai-platforms/langchain/langsmith-fleet-add-connection.png?fit=max\&auto=format\&n=RgaE_4ZxFuvAQ6gS\&q=85\&s=16d2132bfc6f1c47d768f6635ae3f4ef)
>
> To check it works, send this in the agent's chat:
>
> ```text theme={null}
> Which of my Linked Accounts can you reach through StackOne?
> ```

> [tab] Shared with me
>
> **1. Open the agent**
>
> 1. In Fleet, open the agent your teammate shared with you.
>
> 2. Send it this:
>
>    ```text theme={null}
>    Which of my Linked Accounts can you reach through StackOne?
>    ```
>
> 3. If it asks you to connect StackOne, click **Connect**.
>
> If it answers with your systems instead, you're done. The agent already uses a StackOne login, so there's no sign-in step for you.
>
> > [accordion] StackOne isn't there
> >
> > If the agent says it can't reach StackOne, ask the person who shared it to add StackOne. If StackOne isn't in your workspace yet, send your LangSmith workspace admin this:
> >
> > ```text theme={null}
> > Can you add StackOne to LangSmith Fleet for our workspace, as a custom MCP server?
> > ```
>
> **2. Sign in and authorize**
>
> 1. Sign in to StackOne. In a desktop app or code editor, this opens in your browser.
> 2. If StackOne asks for a project, pick yours and click **Continue to Accounts**.
> 3. Pick the work systems LangSmith Fleet can use (your Linked Accounts).
> 4. If you see **Load tools when needed**, leave it on.
> 5. Click **Authorize**.
>
> ![StackOne's Select accounts screen with two Linked Accounts ticked, Load tools when needed on, and the Authorize button](https://mintcdn.com/stackone-60/RgaE_4ZxFuvAQ6gS/images/ai-platforms/oauth-consent-select-accounts.png?fit=max\&auto=format\&n=RgaE_4ZxFuvAQ6gS\&q=85\&s=66ef4eb4d8bf6e5246e5f01ec959c187)
>
> **3. Check it works**
>
> Back in Fleet, the agent continues and lists the Linked Accounts it can reach. If it doesn't, send the message again:
>
> ```text theme={null}
> Which of my Linked Accounts can you reach through StackOne?
> ```

## Shared and scheduled agents

* **Runs with no one in the chat.** An agent on a schedule, or one started from Slack, Gmail or Teams, can't stop to ask anyone to sign in. Connect StackOne and check it in a chat first.
* **Sharing your agent.** The agent's connection setting under **Configure** decides whose StackOne login it uses. **Per-user**, Fleet's recommended option, has each teammate sign in with their own login. **Shared** has everyone work through your StackOne connection and reach your Linked Accounts.
* **One login for the whole workspace.** If your admin connected StackOne with a single workspace login, there's no sign-in step. StackOne works in any agent that has it.

> [accordion] If something goes wrong
>
> **Can't find or add StackOne.** Your LangSmith workspace admin adds StackOne to the workspace. Adding it yourself needs the **MCP Server Create** permission, which they can grant.
>
> **A system you need is missing.** Ask your StackOne admin, or see [Linking Accounts](https://docs.stackone.com/connect/managing-connectors/linking-accounts.md).
>
> **It stopped working.** StackOne shows **Needs reconnect** in **Integrations** or in your agent's **Connections**. Click **Reconnect** and sign in again. Access lasts 90 days from when you clicked **Authorize**.
>
> **The agent stops and waits.** A StackOne tool set to **Ask** runs only after you click **Accept**. To let it run on its own, set it to **Auto** under **Connections**.
>
> **Agents stop starting new runs.** Your organization may have used its monthly Fleet allowance or reached a weekly spend limit. Ask your LangSmith workspace admin.
>
> **It can't do something.** It can do only what your own StackOne access allows. Ask your StackOne admin.

> [accordion] Add or change accounts
>
> LangSmith Fleet reaches only the Linked Accounts you approved when you connected. To add one you link later, or one someone shares with you afterwards:
>
> **1. Open Connected Apps**
>
> In the StackOne dashboard, go to [**Connected Apps**](https://app.stackone.com/connected_apps).
>
> **2. Edit the connection**
>
> 1. Open the **⋮** menu on the row for LangSmith Fleet and select **Edit tool access**.
> 2. Select the Linked Account.
> 3. Click **Save changes**.
>
> To review or revoke the connection, use the same **⋮** menu in **Connected Apps**.


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