How to connect Gmail to Codex

1. 1. Enable Gmail in Metorial

   In your Metorial portal, enable the Gmail MCP server and sign in with the account that owns the data. Access stays governed by your team policies.

2. 2. Add the server and sign in

   The Codex CLI, IDE extension and ChatGPT desktop app share this config.

   Copy

   codex mcp add metorial --url <your-magic-mcp-url>
   codex mcp login metorial

3. 3. Check the connection

   Type /mcp in Codex to see Metorial and its Gmail tools.

• Modify Message: Modify a message's labels, move it to trash, or restore it from trash.
• Manage Settings: View and manage Gmail settings including vacation responder (auto-reply), IMAP, POP, display language, mail filters, forwarding addresses, auto-forwarding status, and send-as alia…
• Manage Draft: Create, update, send, list, get, or delete email drafts.
• Manage Labels: List, create, update, get, or delete Gmail labels.
• Manage Thread: Get, list, modify labels, trash, or restore email conversation threads.
• Search Messages: Search and list email messages using Gmail query syntax.
• Get Message: Retrieve a single email message by its ID.
• Send Email: Send an email message to one or more recipients.
• Get Attachment: Download an email attachment by its ID.
• Search Google Contacts: Searches the authenticated user's Google Contacts from the People API by name, email address, phone number, or other fields.
• List Google Contacts: Lists the authenticated user's Google Contacts from the People API with pagination support.
• Get Google Contact: Retrieves detailed Google Contacts information for a People API resource name.
• Delete Messages Permanently: Immediately and permanently delete one or more Gmail messages.
• Delete Thread Permanently: Immediately and permanently delete a Gmail thread and all messages in it.
• Forward Message: Forward an existing Gmail message to new recipients while preserving its complete MIME body and attachments.
• And 3 more on the Gmail MCP server page.

• Limit which Gmail tools Codex sees with enabled_tools and disabled_tools on the metorial server in config.toml.
• Set default_tools_approval_mode to auto, prompt, writes or approve. writes prompts only for tools that are not marked read-only.
• Type /mcp in the composer to see the connected servers.
• Override the approval behavior for a single Gmail tool with tools.<tool>.approval_mode.

Metorial is listed but tools are missing

Codex can connect without credentials and then see nothing. Run codex mcp login metorial to complete the OAuth sign-in.

Metorial times out at startup

Codex waits 10 seconds by default. Raise startup_timeout_sec under [mcp_servers.metorial] in ~/.codex/config.toml.

Long tool calls fail after a minute

The default tool timeout is 60 seconds. Raise tool_timeout_sec for the metorial server in config.toml.

Based on the Codex MCP documentation.