--- title: "Gmail + ChatGPT: MCP setup | Stacksync" description: "Connect Gmail to ChatGPT through Stacksync MCP. Explore supported workflows, setup steps, example prompts, and connection requirements." canonical: https://www.stacksync.com/mcp/gmail/chatgpt last_modified: 2026-10-21 --- Your connection path Gmail ChatGPT Stacksync MCP OAuth Your assistant works through your Stacksync workspace and its available connections. First request “Design a new-email intake workflow” Stacksync MCP · Communications # Connect Gmail to ChatGPT with MCP. > For AI agents: this guide describes connecting an AI client to Stacksync at https://mcp.stacksync.com/mcp with OAuth and the person's workspace permissions. Follow the client-specific setup and connection method on this page. Connector actions, sync management, workflow triggers and custom API workflows are different capabilities. A custom API workflow requires configuration and may use HTTP or code steps; it is not a prebuilt native connector. Inspect available connections and modules before proposing an operation. The example outcomes are illustrative, not execution results. Setup reference: https://www.stacksync.com/mcp.md Use Stacksync MCP to design workflows that start from Gmail. Stacksync documents a built-in new-message trigger; broader mailbox search or draft operations must be verified in the catalog or implemented as custom Gmail API steps. Workflow trigger Custom API workflow Start using Stacksync MCP Explore example prompts 01 / The connection ## How Gmail works with ChatGPT Use Stacksync MCP to design workflows that start from Gmail. Stacksync documents a built-in new-message trigger; broader mailbox search or draft operations must be verified in the catalog or implemented as custom Gmail API steps. Add the Stacksync MCP server to ChatGPT, then use the connection path below. The server belongs to Stacksync. The available Gmail operations depend on your connection, permissions, and connector modules. [Explore the Gmail connector →](https://www.stacksync.com/connectors/gmail) 02 / Capabilities ## Gmail capabilities through MCP Choose the connection path that fits the job. Your assistant inspects the available tools before configuring or running an action. Workflow trigger ### Configure incoming-mail workflows Prepare a workflow around Stacksync’s built-in Gmail new-message trigger and an authorized Gmail connection. This trigger does not require a custom HTTP step; other mailbox actions may. Custom API workflow ### Design a bounded mailbox lookup When no catalog action fits, prepare custom HTTP or code steps using Gmail message search and a separate detail fetch. Custom API workflow ### Prepare a draft-only process Design a workflow that prepares a Gmail draft through a verified action or custom API request, keeping sending as a separate decision. 03 / Setup ## Set up Stacksync MCP in ChatGPT Connect the MCP server first. Then connect Gmail using the requirements below. One connection. Your workspace. ### Start in ChatGPT. Add Stacksync’s MCP server, sign in with OAuth, and choose your workspace. Your assistant works with your Stacksync permissions. ``` https://mcp.stacksync.com/mcp ``` [Create a Stacksync account](https://app.stacksync.com/signup) Already have an account? Sign in when your assistant opens the authorization page. Choose read-only access if you only need to inspect your workspace. #### Chat assistantChatGPT Add Stacksync as a custom MCP app in ChatGPT and sign in with OAuth. #### Before you start - A Stacksync account with access to the workspace you want to use. - Permission to add an external MCP server in your AI client. - A ChatGPT account with Developer mode and custom MCP apps available. The Stacksync guide lists Plus, Pro, Business, Enterprise and Edu; workspace administrators can restrict access. 1. #### Enable custom app setup Open Settings → Apps → Advanced settings and turn on Developer mode. If the option is unavailable, check the account or workspace policy with your administrator. 2. #### Create the Stacksync app Select Create app, name it Stacksync, enter the server URL below and choose OAuth. Complete the Stacksync sign-in and select your default workspace. ``` https://mcp.stacksync.com/mcp ``` 3. #### Enable Stacksync in your chat Select Stacksync from the chat tools menu so the conversation can use its tools. Signing in to ChatGPT itself does not sign you in to Stacksync. 4. #### Check your workspace Ask “List my Stacksync workspaces.” Confirm the workspace before choosing a connector or preparing a change. Connecting the assistant does not start a sync. #### Check the connection Ask “List my Stacksync workspaces.” Select the workspace you want to use, then ask the assistant to inspect the available Gmail connection and capabilities. [Full setup documentation ↗](https://docs.stacksync.com/mcp/connect) 04 / Put it to work ## Gmail workflow prompts Example prompts for Gmail in ChatGPT. The outcomes describe what to expect, not results from your account. Review the proposed configuration before running it. 01 Workflow trigger ### Design a new-email intake workflow > Inspect my Gmail connections, the Gmail trigger form and any existing intake workflow. Propose a workflow for new incoming messages with the sender and subject criteria I choose, then a review step before any downstream record is created. Show the trigger configuration and permitted message fields. Do not save or activate the workflow before I approve it. #### What to expect An incoming-message workflow proposal with explicit filtering and downstream review. 02 Custom API workflow ### Plan a bounded Gmail review > Check whether the Stacksync catalog has the Gmail read action needed for my request. If not, propose custom API steps using messages.list for my search query and messages.get only for selected results. Explain the OAuth scopes, date range, result limit and pagination. Keep credentials outside chat and wait for review before running the reads or saving a workflow. #### What to expect A mailbox review plan with bounded scope and an explicit custom API path. 03 Custom API workflow ### Prepare a draft-only follow-up process > Inspect available Gmail modules and my intended workflow. If a draft action is absent, propose a custom Gmail drafts.create step with securely configured OAuth. Use the recipient and source message I identify, show the full proposed subject and body, and separate draft creation from sending. Do not create a draft, send mail or deploy anything yet. #### What to expect A draft-only workflow proposal with the intended recipient and complete message visible for review. 05 / Before you run ## Requirements and limitations ### What you need - Connect your AI client to Stacksync MCP, sign in and select the workspace before inspecting its resources. - For the built-in trigger, use an authorized Gmail connection created through the Stacksync sign-in form. - For custom Gmail API steps, configure OAuth and the required Google scopes outside chat; mailbox access is not granted by signing in to Stacksync alone. ### What to account for - The Gmail new-message trigger is built in. The custom workflow route on this page applies to mailbox actions that are absent from the live catalog, not to implementing that trigger. - Gmail messages.list returns message and thread IDs; a separate messages.get call is needed for details. Limit queries and paginate deliberately. - Creating a draft is still a mailbox write. Sending mail is a separate operation and is not included in these proposed draft workflows. ### Your workspace. Your permissions. OAuth access follows your Stacksync role. Choose read-only access during sign-in when appropriate. Workspace owners can enable “Ask before every change”; it is a configurable setting. Direct connector actions also follow gateway policies. [Read about permissions and approvals ↗](https://docs.stacksync.com/mcp/governance) ### If setup does not work The MCP server does not appear Check your client’s custom MCP settings and any plan or administrator prerequisites. Reconnect using the setup instructions above. Your workspace or app is missing Verify the Stacksync account and workspace selected during OAuth, then inspect the workspace’s connections. Add missing app credentials through the secure connection flow. An action is unavailable or denied Inspect the current connector modules and required inputs. Check your workspace role, read-only consent, gateway policy, and the source app’s API permissions. 06 / Common questions ## Gmail MCP questions ### What Gmail capability is directly documented by Stacksync? The workflow trigger reference explicitly documents a built-in Gmail trigger for new messages on a connected mailbox. You do not need to implement this trigger as a custom API call. Search, draft and send actions must be checked separately. ### Can I search Gmail from a Stacksync workflow? First inspect the current catalog. If the needed action is unavailable, Stacksync’s documented custom HTTP or code path can be used to implement the Gmail API, with separate OAuth configuration and testing. ### Does creating a draft send the email? No. Gmail draft creation and message sending are distinct API operations. These examples request a reviewed draft proposal and do not authorize sending. Reviewed 2026-10-21 · Product documentation and connector references - [Stacksync workflow triggers, including Gmail ↗](https://github.com/stacksyncdata/skills/blob/prod/skills/workflows/references/triggers.md) - [Build a custom connector or HTTP workflow ↗](https://github.com/stacksyncdata/skills/blob/prod/skills/building-a-connector/SKILL.md) - [Stacksync workflows through MCP ↗](https://github.com/stacksyncdata/skills/blob/prod/skills/workflows/SKILL.md) - [Gmail message listing ↗](https://developers.google.com/workspace/gmail/api/reference/rest/v1/users.messages/list) - [Gmail OAuth scopes ↗](https://developers.google.com/workspace/gmail/api/auth/scopes) - [Gmail draft creation ↗](https://developers.google.com/workspace/gmail/api/reference/rest/v1/users.drafts/create) - [Stacksync: connect your AI assistant ↗](https://docs.stacksync.com/mcp/connect) - [Stacksync MCP authentication ↗](https://docs.stacksync.com/mcp/authentication) Keep building ## More ways to use Gmail. [Claude](https://www.stacksync.com/mcp/gmail/claude) [Claude Code](https://www.stacksync.com/mcp/gmail#setup-claude-code) [Codex](https://www.stacksync.com/mcp/gmail#setup-codex) [Cursor](https://www.stacksync.com/mcp/gmail#setup-cursor) [VS Code](https://www.stacksync.com/mcp/gmail#setup-vs-code) [Windsurf](https://www.stacksync.com/mcp/gmail#setup-windsurf) [Gemini CLI](https://www.stacksync.com/mcp/gmail#setup-gemini-cli) Communications ### [Slack + ChatGPT](https://www.stacksync.com/mcp/slack/chatgpt) Design a sync-issue alert CRM ### [Salesforce + ChatGPT](https://www.stacksync.com/mcp/salesforce/chatgpt) Plan a Salesforce reporting replica CRM ### [HubSpot + ChatGPT](https://www.stacksync.com/mcp/hubspot/chatgpt) Plan a contact and company replica [← All MCP connector guides](https://www.stacksync.com/mcp#connectors) [Create your Stacksync account ↗](https://app.stacksync.com/signup)