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SKILL.md
ConvertKit (Kit) Automation via Rube MCP
Automate ConvertKit (now known as Kit) email marketing operations through Composio's Kit toolkit via Rube MCP.
Prerequisites
Rube MCP must be connected (RUBE_SEARCH_TOOLS available)
Active Kit connection via RUBE_MANAGE_CONNECTIONS with toolkit kit
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.
Verify Rube MCP is available by confirming RUBE_SEARCH_TOOLS responds
Call RUBE_MANAGE_CONNECTIONS with toolkit kit
If connection is not ACTIVE, follow the returned auth link to complete Kit authentication
Confirm connection status shows ACTIVE before running any workflows
Core Workflows
1. List and Search Subscribers
When to use: User wants to browse, search, or filter email subscribers
Tool sequence:
KIT_LIST_SUBSCRIBERS - List subscribers with filters and pagination [Required]
Key parameters:
status: Filter by status ('active' or 'inactive')
email_address: Exact email to search for
created_after/created_before: Date range filter (YYYY-MM-DD)
updated_after/updated_before: Date range filter (YYYY-MM-DD)
sort_field: Sort by 'id', 'cancelled_at', or 'updated_at'
sort_order: 'asc' or 'desc'
per_page: Results per page (min 1)
after/before: Cursor strings for pagination
include_total_count: Set to 'true' to get total subscriber count
Pitfalls:
If sort_field is 'cancelled_at', the status must be set to 'cancelled'
Date filters use YYYY-MM-DD format (no time component)
email_address is an exact match; partial email search is not supported
Pagination uses cursor-based approach with after/before cursor strings
include_total_count is a string 'true', not a boolean
2. Manage Subscriber Tags
When to use: User wants to tag subscribers for segmentation
Tool sequence:
KIT_LIST_SUBSCRIBERS - Find subscriber ID by email [Prerequisite]
KIT_TAG_SUBSCRIBER - Associate a subscriber with a tag [Required]
KIT_LIST_TAG_SUBSCRIBERS - List subscribers for a specific tag [Optional]
Key parameters for tagging:
tag_id: Numeric tag ID (required)
subscriber_id: Numeric subscriber ID (required)
Pitfalls:
Both tag_id and subscriber_id must be positive integers
Tag IDs must reference existing tags; tags are created via the Kit web UI
Tagging an already-tagged subscriber is idempotent (no error)
Subscriber IDs are returned from LIST_SUBSCRIBERS; use email_address filter to find specific subscribers
3. Unsubscribe a Subscriber
When to use: User wants to unsubscribe a subscriber from all communications
Tool sequence:
KIT_LIST_SUBSCRIBERS - Find subscriber ID [Prerequisite]
KIT_DELETE_SUBSCRIBER - Unsubscribe the subscriber [Required]
Key parameters:
id: Subscriber ID (required, positive integer)
Pitfalls:
This permanently unsubscribes the subscriber from ALL email communications
The subscriber's historical data is retained but they will no longer receive emails
Operation is idempotent; unsubscribing an already-unsubscribed subscriber succeeds without error
Returns empty response (HTTP 204 No Content) on success
Subscriber ID must exist; non-existent IDs return 404
4. List and View Broadcasts
When to use: User wants to browse email broadcasts or get details of a specific one
Tool sequence:
KIT_LIST_BROADCASTS - List all broadcasts with pagination [Required]
KIT_GET_BROADCAST - Get detailed information for a specific broadcast [Optional]
KIT_GET_BROADCAST_STATS - Get performance statistics for a broadcast [Optional]
Key parameters for listing:
per_page: Results per page (1-500)
after/before: Cursor strings for pagination
include_total_count: Set to 'true' for total count
Key parameters for details:
id: Broadcast ID (required, positive integer)
Pitfalls:
per_page max is 500 for broadcasts
Broadcast stats are only available for sent broadcasts
Draft broadcasts will not have stats
Broadcast IDs are numeric integers
5. Delete a Broadcast
When to use: User wants to permanently remove a broadcast
Tool sequence:
KIT_LIST_BROADCASTS - Find the broadcast to delete [Prerequisite]
KIT_GET_BROADCAST - Verify it is the correct broadcast [Optional]
KIT_DELETE_BROADCAST - Permanently delete the broadcast [Required]
Key parameters:
id: Broadcast ID (required)
Pitfalls:
Deletion is permanent and cannot be undone
Deleting a sent broadcast removes it but does not unsend the emails
Confirm the broadcast ID before deleting
Common Patterns
Subscriber Lookup by Email
1. Call KIT_LIST_SUBSCRIBERS with email_address='[email protected]'
2. Extract subscriber ID from the response
3. Use ID for tagging, unsubscribing, or other operations
Pagination
Kit uses cursor-based pagination:
Check response for after cursor value
Pass cursor as after parameter in next request
Continue until no more cursor is returned
Use include_total_count: 'true' to track progress
Tag-Based Segmentation
1. Create tags in Kit web UI
2. Use KIT_TAG_SUBSCRIBER to assign tags to subscribers
3. Use KIT_LIST_TAG_SUBSCRIBERS to view subscribers per tag
