Connect ChatGPT to Sequential (MCP)

1. 1

   In Sequential, open Agents in the left rail.

   If you start in Settings or in onboarding

   The same tab is under Connect an agent in Settings › Agents & tokens. In onboarding, the Connect your agent step has a ChatGPT tab after the claude.ai tab, while the sign-in is on.

2. 2

   Under Connect an agent, click the ChatGPT tab.

   If you do not see the ChatGPT tab

   Sequential checks once, when the page loads, that the sign-in is on. Until the check answers, there are no tabs. If the sign-in is off, a line says "claude.ai and ChatGPT: Not available yet." If the check fails, a line says "Couldn’t check whether claude.ai and ChatGPT are available", with Retry.

3. 3

   Next to Server URL, click Copy.

   Result: This copies the server URL: the address of your Sequential API, followed by /mcp.

4. 4

   In ChatGPT on the web, open Plugins in the left rail. Click Add, then Add custom MCP server.

   If you want the exact steps from the tab

   The ChatGPT tab says: "In ChatGPT on the web, open Plugins. Click Add, then Add custom MCP server." Then: "Name it Sequential. Paste the URL below as the Server URL and choose OAuth. Tick “I understand and want to continue”, then click Create as a plugin." The last step says: "Click Connect, then Connect Sequential. ChatGPT sends you here to sign in and choose the project. You choose what it may do."

5. 5

   In Name, type "Sequential". Under Connection, keep Server URL and paste the URL. Under Authentication, choose OAuth. Leave Advanced OAuth settings as they are.

6. 6

   Tick I understand and want to continue, then click Create as a plugin.

7. 7

   Click Connect, then Connect Sequential.

   Result: The same browser tab opens Sequential.

8. 8

   If you are not signed in to Sequential, sign in. If your account has 2FA, enter your code.

   Result: The consent page opens. Its title is "ChatGPT wants to connect to Sequential".

9. 9

   Choose one project, or all projects of an organisation, and the access. See The consent page: it is the same for ChatGPT.

10. 10

    Click Allow.

    If ChatGPT asks you before it uses a tool

    In ChatGPT, the plugin has a Permission setting: "Choose when ChatGPT should ask for permission when using this plugin". It has four choices: "Always ask", "Allow read-only tools", "Allow low-risk tools" (the default; the plugin's settings show it as Allow low-risk) and "Allow all tools". In our test with the default, ChatGPT recorded a review_session check without asking. To have ChatGPT ask you before every change, choose "Allow read-only tools". To have it ask before every tool, choose "Always ask". Every Sequential tool says whether it only reads, whether it can overwrite, and whether it reaches outside Sequential.

Done when: Sequential sends you back to ChatGPT. Under Connected accounts, the plugin shows your Sequential account.

1. 1

   On the plugin's page in ChatGPT, click Try in chat. Ask, for example "Using Sequential, what are the biggest problems in my project this week?"

2. 2

   In Sequential, on Agents, under Connected, find "ChatGPT (chatgpt.com)".

   Result: After the first tool call, its row shows a time under Last used.

1. 1

   In Sequential, open Agents, find "ChatGPT (chatgpt.com)" and click Disconnect…. Then click Disconnect.

   Result: The connection moves under Revoked and expired, as Revoked.

2. 2

   In ChatGPT, open the plugin settings of Sequential. Under Connected accounts, open the menu of your account and click Disconnect. ChatGPT tells Sequential, and the connection moves under Revoked and expired. To remove the plugin too, click Uninstall.