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MailerLite MCP by usefulapi

by io.usefulapi
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Server Details

Read subscribers, groups, campaigns, fields, segments, automations, webhooks; safe additive writes.

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Status
Healthy
Uptime
81.0% over 56 days
Last Tested
Transport
Streamable HTTP · MCP 2025-06-18
URL
Repository
m190/usefulapi-mcp
GitHub Stars
0

TDQS

A3.8/5.0

Scored across 13 tools

Disambiguation5/5

Each tool targets a specific resource and action (e.g., subscriber, group, campaign) with no ambiguity. Even similar tools like list_subscribers and list_group_subscribers are clearly differentiated because one is global and the other is scoped to a group.

Naming Consistency5/5

All tools follow the consistent pattern 'mailerlite_verb_noun' (e.g., list_subscribers, create_group, get_campaign). The prefix ensures uniqueness, and verbs like list, get, create, upsert, assign are used uniformly.

Tool Count4/5

13 tools is reasonable for a MailerLite integration. It covers the core subscriber and group management well, while being lighter on other areas like campaigns and automations. The count is appropriate without being overwhelming.

Completeness3/5

The tool set covers subscriber and group management (CRUD for subscribers, create/list/assign groups) but is read-only for campaigns, automations, fields, segments, and webhooks. Missing operations like delete subscriber, delete/update group, and any write on campaigns indicate notable gaps.

Available Tools

13 tools
mailerlite_assign_subscriber_to_groupAssign subscriber to group
Destructive
Inspect

Adds a subscriber to a group (additive membership). MailerLite API: POST /subscribers/{subscriber_id}/groups/{group_id}.

ParametersJSON Schema
NameRequiredDescriptionDefault
group_idYesGroup id.
subscriber_idYesSubscriber id.
mailerlite_create_groupCreate group
Destructive
Inspect

Creates a subscriber group/list (additive). MailerLite API: POST /groups.

ParametersJSON Schema
NameRequiredDescriptionDefault
nameYesName of the new group.
mailerlite_get_campaignGet campaign
Read-only
Inspect

Fetch a single campaign by id. Read-only. MailerLite API: GET /campaigns/{campaign_id}.

ParametersJSON Schema
NameRequiredDescriptionDefault
campaign_idYesCampaign id.
mailerlite_get_subscriberGet subscriber
Read-only
Inspect

Fetch a single subscriber by id or email address. MailerLite API: GET /subscribers/{id}.

ParametersJSON Schema
NameRequiredDescriptionDefault
idYesSubscriber id OR email address.
mailerlite_list_automationsList automations
Read-only
Inspect

List automations (workflows), optionally filtered by enabled state. Page-paginated. MailerLite API: GET /automations.

ParametersJSON Schema
NameRequiredDescriptionDefault
pageNoPage number (page-based pagination).
limitNoMax automations per page (default 25).
filter_enabledNoFilter by enabled state (→ filter[enabled]).
mailerlite_list_campaignsList campaigns
Read-only
Inspect

List campaigns, optionally filtered by status. Page-paginated. Read-only — this server does NOT send campaigns. MailerLite API: GET /campaigns.

ParametersJSON Schema
NameRequiredDescriptionDefault
pageNoPage number (page-based pagination).
limitNoMax campaigns per page (default 25).
statusNoFilter by status (→ filter[status]): sent | draft | ready.
mailerlite_list_fieldsList fields
Read-only
Inspect

List custom/default subscriber fields, optionally filtered by type or keyword. Page-paginated. MailerLite API: GET /fields.

ParametersJSON Schema
NameRequiredDescriptionDefault
pageNoPage number (page-based pagination).
typeNoFilter by field type (→ filter[type]): text | number | date.
limitNoMax fields per page (default 25).
keywordNoFilter by keyword (→ filter[keyword]).
mailerlite_list_groupsList groups
Read-only
Inspect

List subscriber groups/lists, optionally filtered by name. Page-paginated. MailerLite API: GET /groups.

ParametersJSON Schema
NameRequiredDescriptionDefault
nameNoFilter by name (→ filter[name]).
pageNoPage number (page-based pagination).
sortNoSort field, e.g. name, total, -total, created_at.
limitNoMax groups per page (default 25).
mailerlite_list_group_subscribersList group subscribers
Read-only
Inspect

List the subscribers belonging to a group, optionally filtered by status. Cursor-paginated. MailerLite API: GET /groups/{group_id}/subscribers.

ParametersJSON Schema
NameRequiredDescriptionDefault
limitNoMax subscribers per page (default 25, max 100).
cursorNoPagination cursor from a previous response's meta.next_cursor.
statusNoFilter by status (→ filter[status]).
group_idYesGroup id.
mailerlite_list_segmentsList segments
Read-only
Inspect

List segments. Page-paginated. MailerLite API: GET /segments.

ParametersJSON Schema
NameRequiredDescriptionDefault
pageNoPage number (page-based pagination).
limitNoMax segments per page (default 25).
mailerlite_list_subscribersList subscribers
Read-only
Inspect

List subscribers, optionally filtered by status. Cursor-paginated. MailerLite API: GET /subscribers.

ParametersJSON Schema
NameRequiredDescriptionDefault
limitNoMax subscribers to return per page (default 25, max 100).
cursorNoPagination cursor from a previous response's meta.next_cursor.
statusNoFilter by status (→ filter[status]): active | unsubscribed | unconfirmed | bounced | junk.
mailerlite_list_webhooksList webhooks
Read-only
Inspect

List configured webhooks. Page-paginated. MailerLite API: GET /webhooks.

ParametersJSON Schema
NameRequiredDescriptionDefault
pageNoPage number (page-based pagination).
limitNoMax webhooks per page (default 25).
mailerlite_upsert_subscriberUpsert subscriber
Destructive
Inspect

Creates or updates a subscriber (upsert by email). Additive — does NOT send any email. MailerLite API: POST /subscribers.

ParametersJSON Schema
NameRequiredDescriptionDefault
emailYesSubscriber email address (upsert key).
fieldsNoCustom/default field values keyed by field key, e.g. { name, last_name, company }.
groupsNoGroup id strings to add the subscriber to.
statusNoSubscriber status: active | unsubscribed | unconfirmed | bounced | junk.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

  1. 13 tool updates
    • Changedmailerlite_assign_subscriber_to_group1 field changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • Changedmailerlite_create_group1 field changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • Changedmailerlite_get_campaign1 field changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • Changedmailerlite_get_subscriber1 field changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • Changedmailerlite_list_automations1 field changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • Changedmailerlite_list_campaigns1 field changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • Changedmailerlite_list_fields1 field changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • Changedmailerlite_list_group_subscribers1 field changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • Changedmailerlite_list_groups1 field changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • Changedmailerlite_list_segments1 field changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • Changedmailerlite_list_subscribers1 field changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • Changedmailerlite_list_webhooks1 field changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • Changedmailerlite_upsert_subscriber3 fields changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
      • removedInput schema / properties / fields / additionalProperties / anyOf
        Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "number"
-  }
-]
      • addedInput schema / properties / fields / additionalProperties / type
        Added value: +[
+  "string",
+  "number"
+]
  2. 13 tool updates
    • First observedmailerlite_assign_subscriber_to_group
    • First observedmailerlite_create_group
    • First observedmailerlite_get_campaign
    • First observedmailerlite_get_subscriber
    • First observedmailerlite_list_automations
    • First observedmailerlite_list_campaigns
    • First observedmailerlite_list_fields
    • First observedmailerlite_list_group_subscribers
    • First observedmailerlite_list_groups
    • First observedmailerlite_list_segments
    • First observedmailerlite_list_subscribers
    • First observedmailerlite_list_webhooks
    • First observedmailerlite_upsert_subscriber

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