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.

Toolkit docs

:

composio.dev/toolkits/mailchimp

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 Powered by Composio