SendGrid Automation via Rube MCP

Automate SendGrid email delivery workflows including marketing campaigns (Single Sends), contact and list management, sender identity setup, and email analytics through Composio's SendGrid toolkit.

Toolkit docs: composio.dev/toolkits/sendgrid

Prerequisites

• •Rube MCP must be connected (RUBE_SEARCH_TOOLS available)
• •Active SendGrid connection via RUBE_MANAGE_CONNECTIONS with toolkit sendgrid
• •Always call RUBE_SEARCH_TOOLS first to get current tool schemas

Setup

Get Rube MCP: Add https://rube.app/mcp as an MCP server in your client configuration. No API keys needed — just add the endpoint and it works.

1. •Verify Rube MCP is available by confirming RUBE_SEARCH_TOOLS responds
2. •Call RUBE_MANAGE_CONNECTIONS with toolkit sendgrid
3. •If connection is not ACTIVE, follow the returned auth link to complete SendGrid API key authentication
4. •Confirm connection status shows ACTIVE before running any workflows

Core Workflows

1. Create and Send Marketing Campaigns (Single Sends)

When to use: User wants to create and send a marketing email campaign to a contact list or segment.

Tool sequence:

1. •SENDGRID_RETRIEVE_ALL_LISTS - List available marketing lists to target [Prerequisite]
2. •SENDGRID_CREATE_A_LIST - Create a new list if needed [Optional]
3. •SENDGRID_ADD_OR_UPDATE_A_CONTACT - Add contacts to the list [Optional]
4. •SENDGRID_GET_ALL_SENDER_IDENTITIES - Get verified sender ID [Prerequisite]
5. •SENDGRID_CREATE_SINGLE_SEND - Create the campaign with content, sender, and recipients [Required]

Key parameters for SENDGRID_CREATE_SINGLE_SEND:

• •name: Campaign name (required)
• •email__config__subject: Email subject line
• •email__config__html__content: HTML body content
• •email__config__plain__content: Plain text version
• •email__config__sender__id: Verified sender identity ID
• •email__config__design__id: Use instead of html_content for pre-built designs
• •send__to__list__ids: Array of list UUIDs to send to
• •send__to__segment__ids: Array of segment UUIDs
• •send__to__all: true to send to all contacts
• •email__config__suppression__group__id or email__config__custom__unsubscribe__url: One required for compliance

Pitfalls:

• •Setting send_at on CREATE does NOT schedule the send; it only prepopulates the UI date; use the Schedule endpoint separately
• •send_at: "now" is only valid with the Schedule endpoint, not CREATE
• •Must provide either suppression_group_id or custom_unsubscribe_url for unsubscribe compliance
• •Sender must be verified before use; check with SENDGRID_GET_ALL_SENDER_IDENTITIES
• •Nested params use double-underscore notation (e.g., email__config__subject)

2. Manage Contacts and Lists

When to use: User wants to create contact lists, add/update contacts, search for contacts, or remove contacts from lists.

Tool sequence:

1. •SENDGRID_RETRIEVE_ALL_LISTS - List all marketing lists [Required]
2. •SENDGRID_CREATE_A_LIST - Create a new contact list [Optional]
3. •SENDGRID_GET_A_LIST_BY_ID - Get list details and sample contacts [Optional]
4. •SENDGRID_ADD_OR_UPDATE_A_CONTACT - Upsert contacts with list association [Required]
5. •SENDGRID_GET_CONTACTS_BY_EMAILS - Look up contacts by email [Optional]
6. •SENDGRID_GET_CONTACTS_BY_IDENTIFIERS - Look up contacts by email, phone, or external ID [Optional]
7. •SENDGRID_GET_LIST_CONTACT_COUNT - Verify contact count after operations [Optional]
8. •SENDGRID_REMOVE_CONTACTS_FROM_A_LIST - Remove contacts from a list without deleting [Optional]
9. •SENDGRID_REMOVE_LIST_AND_OPTIONAL_CONTACTS - Delete an entire list [Optional]
10. •SENDGRID_IMPORT_CONTACTS - Bulk import from CSV [Optional]

Key parameters for SENDGRID_ADD_OR_UPDATE_A_CONTACT:

• •contacts: Array of contact objects (max 30,000 or 6MB), each with at least one identifier: email, phone_number_id, external_id, or anonymous_id (required)
• •list_ids: Array of list UUID strings to associate contacts with

Pitfalls:

• •SENDGRID_ADD_OR_UPDATE_A_CONTACT is asynchronous; returns 202 with job_id; contacts may take 10-30 seconds to appear
• •List IDs are UUIDs (e.g., "ca7a3796-e8a8-4029-9ccb-df8937940562"), not integers
• •List names must be unique; duplicate names cause 400 errors
• •SENDGRID_ADD_A_SINGLE_RECIPIENT_TO_A_LIST uses the legacy API; prefer SENDGRID_ADD_OR_UPDATE_A_CONTACT with list_ids
• •SENDGRID_REMOVE_LIST_AND_OPTIONAL_CONTACTS is irreversible; require explicit user confirmation
• •Email addresses are automatically lowercased by SendGrid

3. Manage Sender Identities

When to use: User wants to set up or view sender identities (From addresses) for sending emails.

Tool sequence:

1. •SENDGRID_GET_ALL_SENDER_IDENTITIES - List all existing sender identities [Required]
2. •SENDGRID_CREATE_A_SENDER_IDENTITY - Create a new sender identity [Optional]
3. •`SENDGRID_VIEW_A_SENDER_I