How to connect Mailchimp to Codex

1. 1. Enable Mailchimp in Metorial

   In your Metorial portal, enable the Mailchimp 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 Mailchimp tools.

• List Automations: Retrieve classic automation workflows from the Mailchimp account.
• Manage Campaign: Create, update, or delete an email campaign.
• Manage Template: Create, update, or delete an email template.
• List Campaigns: Retrieve campaigns from the Mailchimp account.
• List Members: Retrieve members (contacts) from an audience.
• Manage Audience: Create, update, or delete an audience (list).
• List Audiences: Retrieve all audiences (lists) in the Mailchimp account.
• Send Campaign: Send, schedule, unschedule, or cancel a campaign.
• Manage Segments: List, create, update, or delete segments within an audience.
• Get Audience Activity: Retrieve recent activity and growth history for an audience.
• Manage Campaign Content: Get or set the HTML/plain-text content of a campaign.
• Manage Member: Add, update, or remove a member (contact) in an audience.
• Manage Automation: Control a classic automation workflow: start, pause, or archive it.
• Add Member Event: Post a custom event for a list member.
• List Templates: Retrieve email templates from the Mailchimp account.
• And 6 more on the Mailchimp MCP server page.

• Limit which Mailchimp 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 Mailchimp 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.