Rei-skills mailchimp-automation

Automate Mailchimp email marketing including campaigns, audiences, subscribers, segments, and analytics via Rube MCP (Composio). Always search tools first for current schemas.

install

source · Clone the upstream repo

git clone https://github.com/rootcastleco/rei-skills

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/rootcastleco/rei-skills "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/mailchimp-automation" ~/.claude/skills/rootcastleco-rei-skills-mailchimp-automation && rm -rf "$T"

manifest: skills/mailchimp-automation/SKILL.md

source content

Mailchimp Automation via Rube MCP

Automate Mailchimp email marketing workflows including campaign creation and sending, audience/list management, subscriber operations, segmentation, and performance analytics through Composio's Mailchimp toolkit.

Prerequisites

Rube MCP must be connected (RUBE_SEARCH_TOOLS available)
Active Mailchimp connection via
```
RUBE_MANAGE_CONNECTIONS
```
with toolkit
```
mailchimp
```
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
```
mailchimp
```
If connection is not ACTIVE, follow the returned auth link to complete Mailchimp OAuth
Confirm connection status shows ACTIVE before running any workflows

Core Workflows

1. Create and Send Email Campaigns

When to use: User wants to create, configure, test, and send an email campaign.

Tool sequence:

```
MAILCHIMP_GET_LISTS_INFO
```
- List available audiences and get list_id [Prerequisite]
```
MAILCHIMP_ADD_CAMPAIGN
```
- Create a new campaign with type, audience, subject, from name [Required]
```
MAILCHIMP_SET_CAMPAIGN_CONTENT
```
- Set HTML content for the campaign [Required]
```
MAILCHIMP_SEND_TEST_EMAIL
```
- Send preview to reviewers before live send [Optional]
```
MAILCHIMP_SEND_CAMPAIGN
```
- Send the campaign immediately [Required]
```
MAILCHIMP_SCHEDULE_CAMPAIGN
```
- Schedule for future delivery instead of immediate send [Optional]

Key parameters for MAILCHIMP_ADD_CAMPAIGN:

```
type
```
: "regular", "plaintext", "rss", or "variate" (required)
```
recipients__list__id
```
: Audience/list ID for recipients
```
settings__subject__line
```
: Email subject line
```
settings__from__name
```
: Sender display name
```
settings__reply__to
```
: Reply-to email address (required for sending)
```
settings__title
```
: Internal campaign title
```
settings__preview__text
```
: Preview text shown in inbox

Key parameters for MAILCHIMP_SET_CAMPAIGN_CONTENT:

```
campaign_id
```
: Campaign ID from creation step (required)
```
html
```
: Raw HTML content for the email
```
plain_text
```
: Plain-text version (auto-generated if omitted)
```
template__id
```
: Use a pre-built template instead of raw HTML

Pitfalls:

```
MAILCHIMP_SEND_CAMPAIGN
```
is irreversible; always send a test email first and get explicit user approval
Campaign must be in "save" (draft) status with valid audience, subject, from name, verified email, and content before sending
```
MAILCHIMP_SCHEDULE_CAMPAIGN
```
requires a valid future datetime; past timestamps fail
Templates and HTML content must include compliant footer/unsubscribe merge tags
Mailchimp uses double-underscore notation for nested params (e.g.,
```
settings__subject__line
```
)

2. Manage Audiences and Subscribers

When to use: User wants to view audiences, list subscribers, or check subscriber details.

Tool sequence:

```
MAILCHIMP_GET_LISTS_INFO
```
- List all audiences with member counts [Required]
```
MAILCHIMP_GET_LIST_INFO
```
- Get details for a specific audience [Optional]
```
MAILCHIMP_LIST_MEMBERS_INFO
```
- List members with status filter and pagination [Required]
```
MAILCHIMP_SEARCH_MEMBERS
```
- Search by email or name across lists [Optional]
```
MAILCHIMP_GET_MEMBER_INFO
```
- Get detailed profile for a specific subscriber [Optional]
```
MAILCHIMP_LIST_SEGMENTS
```
- List segments within an audience [Optional]

Key parameters for MAILCHIMP_LIST_MEMBERS_INFO:

```
list_id
```
: Audience ID (required)
```
status
```
: "subscribed", "unsubscribed", "cleaned", "pending", "transactional", "archived"
```
count
```
: Records per page (default 10, max 1000)
```
offset
```
: Pagination offset (default 0)
```
sort_field
```
: "timestamp_opt", "timestamp_signup", or "last_changed"
```
fields
```
: Comma-separated list to limit response size

Pitfalls:

```
stats.avg_open_rate
```
and
```
stats.avg_click_rate
```
are 0-1 fractions, NOT 0-100 percentages
Always use
```
status="subscribed"
```
to filter active subscribers; omitting returns all statuses
Must paginate using
```
count
```
and
```
offset
```
until collected members match
```
total_items
```
Large list responses may be truncated; data is under
```
response.data.members
```

3. Add and Update Subscribers

When to use: User wants to add new subscribers, update existing ones, or bulk-manage list membership.

Tool sequence:

```
MAILCHIMP_GET_LIST_INFO
```
- Validate target audience exists [Prerequisite]
```
MAILCHIMP_SEARCH_MEMBERS
```
- Check if contact already exists [Optional]
```
MAILCHIMP_ADD_OR_UPDATE_LIST_MEMBER
```
- Upsert subscriber (create or update) [Required]
```
MAILCHIMP_ADD_MEMBER_TO_LIST
```
- Add new subscriber (create only) [Optional]
```
MAILCHIMP_BATCH_ADD_OR_REMOVE_MEMBERS
```
- Bulk manage segment membership [Optional]

Key parameters for MAILCHIMP_ADD_OR_UPDATE_LIST_MEMBER:

```
list_id
```
: Audience ID (required)
```
subscriber_hash
```
: MD5 hash of lowercase email (required)
```
email_address
```
: Subscriber email (required)
```
status_if_new
```
: Status for new subscribers: "subscribed", "pending", etc. (required)
```
status
```
: Status for existing subscribers

merge_fields

: Object with merge tag keys (e.g.,

{"FNAME": "John", "LNAME": "Doe"}

)

```
tags
```
: Array of tag strings

Key parameters for MAILCHIMP_ADD_MEMBER_TO_LIST:

```
list_id
```
: Audience ID (required)
```
email_address
```
: Subscriber email (required)
```
status
```
: "subscribed", "pending", "unsubscribed", "cleaned", "transactional" (required)

Pitfalls:

```
subscriber_hash
```
must be MD5 of the lowercase email; incorrect casing causes 404s or duplicates

Use

MAILCHIMP_ADD_OR_UPDATE_LIST_MEMBER

(upsert) instead of

MAILCHIMP_ADD_MEMBER_TO_LIST

to avoid duplicate errors

```
status_if_new
```
determines status only for new contacts; existing contacts use
```
status
```
Use
```
skip_merge_validation: true
```
to bypass required merge field validation
```
MAILCHIMP_BATCH_ADD_OR_REMOVE_MEMBERS
```
manages static segment membership, not list membership

4. View Campaign Reports and Analytics

When to use: User wants to review campaign performance, open rates, click rates, or subscriber engagement.

Tool sequence:

```
MAILCHIMP_LIST_CAMPAIGNS
```
- List sent campaigns with report summaries [Required]
```
MAILCHIMP_SEARCH_CAMPAIGNS
```
- Find campaigns by name, subject, or content [Optional]
```
MAILCHIMP_GET_CAMPAIGN_REPORT
```
- Get detailed performance report for a campaign [Required]
```
MAILCHIMP_LIST_CAMPAIGN_REPORTS
```
- Bulk fetch reports across multiple campaigns [Optional]
```
MAILCHIMP_LIST_CAMPAIGN_DETAILS
```
- Get link-level click statistics [Optional]
```
MAILCHIMP_GET_CAMPAIGN_LINK_DETAILS
```
- Drill into specific link click data [Optional]
```
MAILCHIMP_LIST_CLICKED_LINK_SUBSCRIBERS
```
- See who clicked a specific link [Optional]
```
MAILCHIMP_GET_SUBSCRIBER_EMAIL_ACTIVITY
```
- Get per-subscriber campaign activity [Optional]
```
MAILCHIMP_GET_CAMPAIGN_CONTENT
```
- Retrieve campaign HTML content [Optional]

Key parameters for MAILCHIMP_LIST_CAMPAIGNS:

```
status
```
: "save", "paused", "schedule", "sending", "sent"
```
count
```
/
```
offset
```
: Pagination (default 10, max 1000)
```
since_send_time
```
/
```
before_send_time
```
: ISO 8601 date range filter
```
sort_field
```
: "create_time" or "send_time"
```
fields
```
: Limit response fields for performance

Key parameters for MAILCHIMP_GET_CAMPAIGN_REPORT:

```
campaign_id
```
: Campaign ID (required)
Returns: opens, clicks, bounces, unsubscribes, timeseries, industry_stats

Pitfalls:

MAILCHIMP_LIST_CAMPAIGNS

only returns high-level

report_summary

; use

MAILCHIMP_GET_CAMPAIGN_REPORT

for detailed metrics

Draft/unsent campaigns lack meaningful report data
When using
```
fields
```
parameter on LIST_CAMPAIGNS, explicitly request
```
send_time
```
and
```
report_summary
```
subfields
Pagination defaults are low (10 records); iterate with
```
count
```
and
```
offset
```
until
```
total_items
```
is covered
```
send_time
```
is ISO 8601 with timezone; parse carefully

Common Patterns

ID Resolution

Always resolve names to IDs before operations:

Audience name -> list_id:
```
MAILCHIMP_GET_LISTS_INFO
```
and match by name
Subscriber email -> subscriber_hash: Compute MD5 of lowercase email in code
Campaign name -> campaign_id:
```
MAILCHIMP_SEARCH_CAMPAIGNS
```
with query
Segment name -> segment_id:
```
MAILCHIMP_LIST_SEGMENTS
```
with list_id

Pagination

Mailchimp uses offset-based pagination:

Use
```
count
```
(page size, max 1000) and
```
offset
```
(skip N records)
Continue until collected records match
```
total_items
```
from the response
Default
```
count
```
is 10; always set explicitly for bulk operations
Search endpoints max at 10 pages (300 results for 30/page)

Subscriber Hash

Many endpoints require

subscriber_hash

(MD5 of lowercase email):

import hashlib
subscriber_hash = hashlib.md5(email.lower().encode()).hexdigest()

Known Pitfalls

ID Formats

```
list_id
```
(audience ID) is a short alphanumeric string (e.g., "abc123def4")
```
campaign_id
```
is an alphanumeric string
```
subscriber_hash
```
is an MD5 hex string (32 characters)
Segment IDs are integers

Rate Limits

Mailchimp enforces API rate limits; use batching for bulk subscriber operations
High-volume use of GET_MEMBER_INFO and ADD_OR_UPDATE_LIST_MEMBER can trigger throttling
Use
```
MAILCHIMP_BATCH_ADD_OR_REMOVE_MEMBERS
```
for bulk segment operations

Parameter Quirks

Nested parameters use double-underscore notation:
```
settings__subject__line
```
,
```
recipients__list__id
```
```
avg_open_rate
```
and
```
avg_click_rate
```
are 0-1 fractions, not percentages
```
status_if_new
```
only applies to new contacts in upsert operations
```
subscriber_hash
```
must be MD5 of lowercase email; wrong casing creates phantom records
Campaign
```
type
```
is required for creation; most common is "regular"
```
MAILCHIMP_SEND_CAMPAIGN
```
returns HTTP 204 on success (no body)

Content and Compliance

Campaign HTML must include unsubscribe link and physical address (merge tags)
Content must be set via
```
MAILCHIMP_SET_CAMPAIGN_CONTENT
```
before sending
Test emails require campaign to have content already set

Quick Reference

Task	Tool Slug	Key Params
List audiences	`MAILCHIMP_GET_LISTS_INFO`	`count` , `offset`
Get audience details	`MAILCHIMP_GET_LIST_INFO`	`list_id`
Create campaign	`MAILCHIMP_ADD_CAMPAIGN`	`type` , `recipients__list__id` , `settings__subject__line`
Set campaign content	`MAILCHIMP_SET_CAMPAIGN_CONTENT`	`campaign_id` , `html`
Send test email	`MAILCHIMP_SEND_TEST_EMAIL`	`campaign_id` , `test_emails`
Send campaign	`MAILCHIMP_SEND_CAMPAIGN`	`campaign_id`
Schedule campaign	`MAILCHIMP_SCHEDULE_CAMPAIGN`	`campaign_id` , `schedule_time`
Get campaign info	`MAILCHIMP_GET_CAMPAIGN_INFO`	`campaign_id`
Search campaigns	`MAILCHIMP_SEARCH_CAMPAIGNS`	`query`
List campaigns	`MAILCHIMP_LIST_CAMPAIGNS`	`status` , `count` , `offset`
Replicate campaign	`MAILCHIMP_REPLICATE_CAMPAIGN`	`campaign_id`
List subscribers	`MAILCHIMP_LIST_MEMBERS_INFO`	`list_id` , `status` , `count` , `offset`
Search members	`MAILCHIMP_SEARCH_MEMBERS`	`query` , `list_id`
Get member info	`MAILCHIMP_GET_MEMBER_INFO`	`list_id` , `subscriber_hash`
Add subscriber	`MAILCHIMP_ADD_MEMBER_TO_LIST`	`list_id` , `email_address` , `status`
Upsert subscriber	`MAILCHIMP_ADD_OR_UPDATE_LIST_MEMBER`	`list_id` , `subscriber_hash` , `email_address` , `status_if_new`
Batch members	`MAILCHIMP_BATCH_ADD_OR_REMOVE_MEMBERS`	`list_id` , `segment_id`
List segments	`MAILCHIMP_LIST_SEGMENTS`	`list_id`
Campaign report	`MAILCHIMP_GET_CAMPAIGN_REPORT`	`campaign_id`
All reports	`MAILCHIMP_LIST_CAMPAIGN_REPORTS`	`count` , `offset`
Link click details	`MAILCHIMP_LIST_CAMPAIGN_DETAILS`	`campaign_id` , `count`
Subscriber activity	`MAILCHIMP_GET_SUBSCRIBER_EMAIL_ACTIVITY`	`campaign_id` , `subscriber_hash`
Member recent activity	`MAILCHIMP_VIEW_RECENT_ACTIVITY`	`list_id` , `subscriber_hash`
Campaign content	`MAILCHIMP_GET_CAMPAIGN_CONTENT`	`campaign_id`

When to Use

This skill is applicable to execute the workflow or actions described in the overview.

🏰 Rei Skills — Curated by Rootcastle Engineering & Innovation | Batuhan Ayrıbaş
Engineering Beyond Boundaries | admin@rootcastle.com