Enginemailer MCP by usefulapi

io.usefulapiPublished by usefulapi.ioOfficial publisherv1.15.4Updated Nov 7, 2026

Read Enginemailer subscribers, lists and campaigns; add subscribers, create and send campaigns.

The publisher's own server: Ably MCP by usefulapi

VerifiedStreamable HTTPWeb executableCommunication & CollaborationBusiness & Commerce

Overview

AI-generated overview

A hosted MCP endpoint for Enginemailer that lets an assistant look up subscribers and lists, manage them, and create, send and measure email campaigns.

What you can do
  • Look up a subscriber by email with status and custom field values, and list subscriber categories and custom field definitions
  • Add, update or unsubscribe subscribers, and create or update subscriber categories
  • List undelivered campaigns and campaign categories and subcategories, and read delivery stats for a delivered campaign
  • Create a campaign draft and assign its recipients by subcategory
  • Send a campaign immediately or send a single transactional email
  • Start and poll a CSV export of the transactional delivery report, and check usage or manage the subscription
When to use it
Useful when you work with Enginemailer email marketing and want an assistant to answer questions about subscribers and campaign performance, or to prepare and send campaigns and transactional emails without switching to the Enginemailer portal.
Requirements
Remote streamable HTTP endpoint; add only the URL, no API key or Authorization header in the client config. Sign-in uses OAuth, and the login page asks for Enginemailer credentials; on first connect you paste an Enginemailer API key. Campaign tools need a paid Enginemailer account, and the hosted service has its own free and paid plans.
Before you install
Several tools change data or send real email: sending a campaign or transactional email is immediate and cannot be undone, and unsubscribing requires the person to opt in again. Confirm audience and content before sending, and only add people who consented to marketing email. The service asks for your Enginemailer API key and offers paid plans with payment links; usage is metered per tool call.

Installation

In SourceWeft

  1. Open Enginemailer MCP by usefulapi in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.usefulapi%2Fenginemailer/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "enginemailer-by-usefulapi": {
      "type": "http",
      "url": "https://enginemailer.usefulapi.io/mcp"
    }
  }
}

README

Enginemailer MCP by usefulapi

Read Enginemailer subscribers, lists and campaigns; add subscribers, create and send campaigns.

Live endpoint: https://enginemailer.usefulapi.io/mcp · Homepage: https://usefulapi.io/enginemailer

Connect

  • Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://enginemailer.usefulapi.io/mcp.
  • Claude Code: claude mcp add --transport http enginemailer https://enginemailer.usefulapi.io/mcp, then run /mcp to log in.
  • VS Code: Add to VS Code.
  • Cursor and other clients: add the URL as a remote MCP server:
json
{  "mcpServers": {    "enginemailer": {      "url": "https://enginemailer.usefulapi.io/mcp"    }  }}

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your Enginemailer credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/enginemailer/

On first connect you'll paste your Enginemailer API key (in Enginemailer open Manage account → API Keys and copy or create a key).

Tools

ToolTypeWhat it does
enginemailer_get_subscriberreadGet subscriber
enginemailer_list_subscriber_categoriesreadList subscriber categories
enginemailer_list_custom_fieldsreadList custom fields
enginemailer_add_subscriberwriteAdd subscriber
enginemailer_update_subscriberwriteUpdate subscriber
enginemailer_unsubscribe_subscriberwriteUnsubscribe subscriber
enginemailer_save_subscriber_categorywriteCreate or update subscriber category
enginemailer_list_campaignsreadList undelivered campaigns
enginemailer_get_campaign_statsreadGet campaign delivery stats
enginemailer_list_campaign_categoriesreadList campaign categories
enginemailer_list_campaign_subcategoriesreadList campaign subcategories
enginemailer_create_campaignwriteCreate campaign (draft)
enginemailer_assign_campaign_recipientswriteAssign campaign recipients
enginemailer_send_campaignwriteSend campaign NOW
enginemailer_send_transactional_emailwriteSend transactional email
enginemailer_start_transactional_report_exportwriteStart transactional report export
enginemailer_check_transactional_report_exportreadCheck transactional report export
enginemailer_usage_statusmetaUsage status (free-tier meter)
enginemailer_request_featuremetaRequest a missing feature
enginemailer_upgrademetaUpgrade to Pro or Pro+
enginemailer_cancel_subscriptionmetaCancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

PlanPriceLimit
Free$050 tool calls / month
Pro (per user)$9/mo or $90/yr (2 months free)Unlimited*

*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to [email protected].

Pro covers this server only. Subscribe with enginemailer_upgrade (it returns a Stripe Checkout link). Cancel any time with enginemailer_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running enginemailer_upgrade before then undoes the cancel. Or write to [email protected].

License

MIT © usefulapi. Not affiliated with or endorsed by Enginemailer.

Source: servers/enginemailer/README.md at commit 4046075

Tools

17

enginemailer_get_subscriber

Get subscriber

One subscriber by email: id, status and all custom field values. GET /restapi/subscriber/emsubscriber/getSubscriber.

Parametersemailrequired

enginemailer_list_subscriber_categories

List subscriber categories

The subscriber category tree: each category with its subcategories (ids, names). Use the subcategory ids when adding or updating subscribers and when assigning campaign recipients. GET /restapi/subscriber/emsubscriber/getSubCategory.

Parametersinclude_active_subscriber_count

enginemailer_list_custom_fields

List custom fields

The subscriber custom field definitions (key, name, type). Use the keys when adding or updating subscribers. GET /restapi/subscriber/emsubscriber/getCustomField.

Takes no parameters.

enginemailer_add_subscriber

Add subscriber

WRITE: add a subscriber to the account (optionally into subcategories, with custom field values). Only add people who consented to marketing email. Free accounts may insert 50 subscribers a day, paid accounts 10,000. POST /restapi/subscriber/emsubscriber/insertSubscriber.

Parametersemailrequiredsource_typecustom_fieldssubcategory_ids

enginemailer_update_subscriber

Update subscriber

WRITE: change an existing subscriber's subcategories and/or custom fields. subcategories_mode: append (default), remove (drop the given subcategories) or replace (the given list becomes the full list). custom_fields_mode: update_given (change only the given fields) or replace_all (default; fields not given are cleared). POST /restapi/subscriber/emsubscriber/updateSubscriber.

Parametersemailrequiredcustom_fieldssubcategory_idscustom_fields_modesubcategories_mode

enginemailer_unsubscribe_subscriber

Unsubscribe subscriber

WRITE: unsubscribe a subscriber so they no longer receive campaigns. Reversing it needs the subscriber to opt in again in Enginemailer. GET /restapi/subscriber/emsubscriber/unSubSubscriber.

Parametersemailrequired

enginemailer_save_subscriber_category

Create or update subscriber category

WRITE: create a subscriber category (category_id 0) or update one (its id), with subcategories (subcategory_id 0 creates one). Names and descriptions max 128 characters. POST /restapi/subscriber/emsubscriber/updateCategory.

Parametersnamerequiredis_visiblecategory_idrequireddescriptionsubcategories

enginemailer_list_campaigns

List undelivered campaigns

List campaigns that have NOT been delivered yet (drafts and scheduled ones): id, name, subject, sender and schedule. Delivered campaigns are not listed by the API; use enginemailer_get_campaign_stats with a known id. Needs a paid account. GET /restapi/campaign/emcampaign/ListCampaign.

Takes no parameters.

enginemailer_get_campaign_stats

Get campaign delivery stats

Delivery results of a DELIVERED campaign: emails sent, delivered, bounces, opens, unique opens, clicks, unique clicks, unsubscribes, spam complaints. Needs a paid account. GET /restapi/campaign/emcampaign/getcampaigndeliverystatus.

Parameterscampaign_idrequired

enginemailer_list_campaign_categories

List campaign categories

The categories that campaign recipients can be filtered by (id, name, description). Needs a paid account. GET /restapi/campaign/emcampaign/GetCategoryList.

Takes no parameters.

enginemailer_list_campaign_subcategories

List campaign subcategories

The subcategories of one campaign category (id, name, description); use these ids in enginemailer_assign_campaign_recipients. Needs a paid account. GET /restapi/campaign/emcampaign/GetSubCategoryList.

Parameterscategory_idrequired

enginemailer_create_campaign

Create campaign (draft)

WRITE: create a campaign DRAFT. Nothing is sent: assign recipients with enginemailer_assign_campaign_recipients, then send with enginemailer_send_campaign. The sender domain must be verified in Enginemailer; max 200 campaigns per account. Needs a paid account. POST /restapi/Campaign/EMCampaign/CreateCampaign.

Parametersnamerequiredsubjectrequiredreply_tosender_namerequiredcontent_htmlrequiredsender_emailrequired

enginemailer_assign_campaign_recipients

Assign campaign recipients

WRITE: set who a campaign will go to: all subscribers, or the subscribers in the given subcategory ids (match_type any = OR, all = AND). Does not send anything. Needs a paid account. POST /restapi/campaign/emcampaign/AssignRecipientList.

Parametersaudiencerequiredmatch_typecampaign_idrequiredsubcategory_ids

enginemailer_send_campaign

Send campaign NOW

WRITE, SENDS EMAIL TO CUSTOMERS NOW and cannot be undone: delivers the campaign to its assigned recipients immediately. The campaign needs at least one recipient and must not be scheduled or already delivered. Show the user the campaign and its audience and get their go-ahead first; set confirm to true only then. Needs a paid account. GET /restapi/campaign/emcampaign/SendCampaign.

Parametersconfirmrequiredcampaign_idrequired

enginemailer_send_transactional_email

Send transactional email

WRITE, SENDS ONE EMAIL NOW and cannot be undone: submits a transactional email to one recipient (plus optional CC/BCC). Needs a sender address on a verified domain; give either subject + content_html, or a template_id from the Enginemailer portal (the template supplies subject and sender name). Total message incl. attachments max 5 MB. Confirm the recipient and text with the user first; set confirm to true only then. POST /RESTAPI/V2/Submission/SendEmail.

Parametersccbccconfirmrequiredsubjectto_emailrequiredsender_nametemplate_idcontent_htmlsender_emailrequiredcampaign_namesubstitution_tags

enginemailer_start_transactional_report_export

Start transactional report export

Start a CSV export of the transactional email delivery report for a period (start date at most 60 days back). Returns an export id; poll it with enginemailer_check_transactional_report_export. Creates a report file only; nothing is sent. POST /RESTAPI/V2/Submission/Report/Export.

Parametersperiodrequireddomain_filteremail_to_filter

enginemailer_check_transactional_report_export

Check transactional report export

Status of a report export (Processing or Complete); when complete it includes the CSV download URL. POST /RESTAPI/V2/Submission/Report/CheckExport (read-only).

Parametersexport_idrequired

Version history

14
  1. v1.15.4LatestNov 7, 2026
  2. v1.14.3Nov 5, 2026
  3. v1.14.2Nov 5, 2026
  4. v1.14.1Nov 4, 2026
  5. v1.14.0Nov 3, 2026
  6. v1.13.1Nov 3, 2026
  7. v1.12.0Nov 1, 2026
  8. v1.10.0Oct 31, 2026
  9. v1.9.0Oct 31, 2026
  10. v1.8.2Oct 30, 2026
  11. v1.8.0Oct 30, 2026
  12. v1.3.0Oct 26, 2026
  13. v1.0.3Oct 25, 2026
  14. v1.0.0Oct 25, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

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