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Connectors · Email & messaging

MailerSend MCP server for AI agents.

actionlake is an MCP gateway: one remote MCP server that connects Claude and other MCP clients to MailerSend and the rest of your systems. It gives your agent 129 MailerSend actions (64 reads, 42 writes and 23 that wait for a confirmation) and holds the MailerSend credential itself, so the agent never does. It paces MailerSend's limits and records every call.

Connect MailerSend freeSee pricing

100,000 free calls a month. No card, no email, no password: press Start a free sandbox on the next screen and keep the key it shows you.

claude mcp add --transport http actionlake https://connect.actionlake.com/mcp
the first call
do {  action: "mailersend.users.list",  intent: "check which MailerSend account is connected"}# Get a list of account users · read · 1 upstream call
  • 129actionsin one signed file
  • 64readlook, never change
  • 42writecreate and update
  • 23wait for a yesdestructive, confirmed first

Set up

Connect MailerSend in three steps.

  1. 01

    Add actionlake to Claude.

    Run the command once in Claude Code; its consent page can create a free sandbox: 100,000 calls a month, no card. In the Claude app, add a custom connector with the URL below and paste your key on the consent page. Creating a new sandbox from the Claude app is not yet tested by us.

    https://connect.actionlake.com/mcp
  2. 02

    Connect MailerSend.

    Bearer token. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead. actionlake stores what you paste write-only, sealed under your tenant's key.

    • access_tokenMailerSend API token
    account { op: "connections.requirements", service: "mailersend" }
# free: exactly what to paste, and what is found for you
  3. 03

    Make the first call. Check before a write.

    Ask in plain words; Claude picks the action. Before anything changes, check validates the call and prices it, for free.

    do    { action: "mailersend.users.list" }# get a list of account users · read · 1 upstream callcheck { action: "mailersend.emails.send", input: { … } }# free: inputs, permissions, cost and confirmations, nothing sent

MailerSend at a glance

Sign-in
Bearer token. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead.
You provide
access_token
Limits we pace to
60 calls a minute, per connection
API covered
MailerSend API v1api.mailersend.com/v1
Built from
MailerSend's documentation, read 23 October 2026developers.mailersend.comapi.swaggerhub.com
Service file
Version 1.0.0, signed (Ed25519)
Cached reads
60 of 64 reads, for up to 5 minutes; a write clears what it affects
Shared entities
4, so ask can line MailerSend up with your other systems
Data
Processed and stored in Sydney, Australia. No US region yet

Capabilities

What an AI agent can do in MailerSend.

129 actions in 34 areas. Every one carries its effect, so a key can allow the reads and hold the rest.

  • 64readlook, never change
  • 42writecreate and update
  • 23destructivewait for a confirmation

  1. Dmarc monitors

    9

    4 read · 3 write · 2 destructive

    Create a monitor · Get IP-specific reports · List monitors · Get aggregated reports

  2. Sender identities

    9

    3 read · 4 write · 2 destructive

    Add a sender identity · Get a list of sender identities · Resend a sender identity verification · Get a single sender identity

  3. Domains

    8

    5 read · 2 write · 1 destructive

    Get a list of domains · Get a single domain · Add a domain · Update domain settings

  4. Blocklist monitors

    5

    2 read · 2 write · 1 destructive

    List monitors · Create a monitor · Get a monitor · Update a monitor

  5. Email verification lists

    5

    3 read · 2 write · 0 destructive

    Create a list · Get all lists · Get list results · Get a single list

  6. Inbound routes

    5

    2 read · 2 write · 1 destructive

    Get a list of inbound routes · Add an inbound route · Get a single inbound route · Delete an inbound route

  7. SMS inbound routes

    5

    2 read · 2 write · 1 destructive

    Add an SMS inbound route · Get a list of SMS inbound routes · Get a single SMS inbound route · Update an inbound route

  8. SMS webhooks

    5

    2 read · 2 write · 1 destructive

    Create an SMS webhook · Get a list of SMS webhooks · Get a single SMS webhook · Update a single SMS webhook

26 more areas · 78 actions
  • SMTP users 5
  • Templates 5
  • Tokens 5
  • Users 5
  • Webhooks 5
  • Analytics 4
  • Invites 4
  • SMS numbers 4
  • Blocklist 3
  • Email verification 3
  • Emails 3
  • Hard bounces 3
  • Recipients 3
  • Scheduled messages 3
  • SMS recipients 3
  • Spam complaints 3
  • Unsubscribes 3
  • Activities 2
  • Bulk emails 2
  • Messages 2
  • On hold list 2
  • SMS messages 2
  • API quota 1
  • SMS 1
  • SMS activities 1
  • Whatsapp 1

Top actions

The MailerSend API, shaped for agents.

The ids your agent types, what each does, and the one name it shares with other systems. 55 of MailerSend's 55 action names are shared with at least one other connector, so an agent learns them once.

ActionWhat it doesEffectSame name in
mailersend.users.listGet a list of account usersGet a list of account users.readidentity.user.list474 connectors
mailersend.emails.listGet a list of emailsGet a list of emails.readcomm.email.list28 connectors
mailersend.domains.listGet a list of domainsGet a list of domains.readcomm.sending_domain.list18 connectors
mailersend.activities.listGet a list of activitiesGet a list of activities.readcomm.delivery_event.list16 connectors
mailersend.users.getGet a single account userGet a single account user.readidentity.user.get399 connectors
mailersend.emails.sendSend an emailSend an email.writecomm.email.send32 connectors
mailersend.domains.getGet a single domainGet a single domain.readcomm.sending_domain.get14 connectors
mailersend.templates.listGet templatesGet templates.readcomm.email_template.list40 connectors
mailersend.sms.sendSend an SMSSend an SMS.writecomm.sms.send26 connectors
mailersend.users.deleteDelete a user from accountDelete a user from account.destructiveidentity.user.delete253 connectors
mailersend.activities.getGet a single activityGet a single activity.readcomm.delivery_event.get6 connectors
mailersend.tokens.createCreate a tokenCreate a token.writeidentity.api_key.create100 connectors

Try it

Prompts to paste into Claude.

Each one names the MailerSend actions it will call, so you know what it reads and what it changes before you send it.

  1. Readread

    Who has access in MailerSend? List every user and their role.

    callsmailersend.users.list

  2. Writewrite

    Send an email in MailerSend. Show me exactly what you will send before you save it.

    callsmailersend.emails.send

Governance for MailerSend

Destructive actions wait for a yes.

23 MailerSend actions are destructive. These are all of them:

  • Delete a user from accountmailersend.users.delete
  • Delete a domainmailersend.domains.delete
  • Delete a templatemailersend.templates.delete
  • Delete a tokenmailersend.tokens.delete
  • Delete recipients from a suppression list (Blocklist)mailersend.blocklist.delete
  • Delete an SMS phone numbermailersend.sms_numbers.delete
  • Cancel an invitemailersend.invites.cancel
  • Delete an inbound routemailersend.inbound_routes.delete
  • Delete a webhookmailersend.webhooks.delete
  • Delete a monitormailersend.blocklist_monitors.delete
  • Delete a recipientmailersend.recipients.delete
  • Delete SMTP usermailersend.smtp_users.delete
  • Delete recipients from a suppression list (Hard Bounces)mailersend.hard_bounces.delete
  • Delete recipients from a suppression list (On Hold List)mailersend.on_hold_list.delete
  • Delete an SMS webhookmailersend.sms_webhooks.delete
  • Delete recipients from a suppression list (Unsubscribes)mailersend.unsubscribes.delete
  • Delete a monitormailersend.dmarc_monitors.delete
  • Delete recipients from a suppression list (Spam Complaints)mailersend.spam_complaints.delete
  • Delete a sender identitymailersend.sender_identities.delete
  • Delete a scheduled messagemailersend.scheduled_messages.delete
  • Delete an SMS inbound routemailersend.sms_inbound_routes.delete
  • Remove IP from favoritesmailersend.dmarc_monitors.unfavorite_ip
  • Delete a sender identity by emailmailersend.sender_identities.delete_by_email

A destructive action runs only with confirm: true. Under the human policy the agent cannot confirm for itself: the run stops until a named person approves, in the console or from a signed link in an email. The cap on a key is refused before the call is sent, never after.

domailersend.users.deleteconfirm_policy: human

Delete a user from account?

intent: the user asked me to delete a user from account

run suspended · waiting for a named person · key mailersend-agent cannot confirm itself
In the console, or from an emailed signed link.
a key for this connector
account {  op: "keys.create", name: "mailersend-agent",  allowed_actions: ["mailersend.*"], cap_calls: 2000,  confirm_policy: "human_for_writes",  approval_rules: [    { match: "mailersend.users.delete", approver: "[email protected]" },    { match: "mailersend.domains.delete", approver: "[email protected]" },    { match: "mailersend.templates.delete", approver: "[email protected]" }  ]}
Illustrative. Scoped to MailerSend only, capped at 2,000 upstream calls, every write confirmed, and the destructive ones approved by a named person.

Cost

What MailerSend costs on actionlake.

Every MailerSend action is one upstream call, the only thing actionlake bills. Searching, check, cost, account and any call MailerSend refused with 401, 403, 429 or a 5xx are free. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

  • 1upstream call per actionall 129 MailerSend actions
  • 129actions pageeach page of a long list is one call
  • 60reads can be cacheda cache hit costs nothing
  • 100,000calls a month, freepaid plans from US$49 a month for 250,000

See pricing

Action index

Every MailerSend action.

129 actions by area: the id your agent calls, what it does, and its effect.

Dmarc monitors9
  • mailersend.dmarc_monitors.createCreate a monitorwrite
  • mailersend.dmarc_monitors.deleteDelete a monitordestructive
  • mailersend.dmarc_monitors.favorite_ipMark IP as favoritewrite
  • mailersend.dmarc_monitors.ip_reportGet IP-specific reportsread
  • mailersend.dmarc_monitors.listList monitorsread
  • mailersend.dmarc_monitors.reportGet aggregated reportsread
  • mailersend.dmarc_monitors.report_sourcesGet report sourcesread
  • mailersend.dmarc_monitors.unfavorite_ipRemove IP from favoritesdestructive
  • mailersend.dmarc_monitors.updateUpdate a monitorwrite
Sender identities9
  • mailersend.sender_identities.createAdd a sender identitywrite
  • mailersend.sender_identities.deleteDelete a sender identitydestructive
  • mailersend.sender_identities.delete_by_emailDelete a sender identity by emaildestructive
  • mailersend.sender_identities.getGet a single sender identityread
  • mailersend.sender_identities.get_by_emailGet a single sender identity by emailread
  • mailersend.sender_identities.listGet a list of sender identitiesread
  • mailersend.sender_identities.resend_verificationResend a sender identity verificationwrite
  • mailersend.sender_identities.updateUpdate a sender identitywrite
  • mailersend.sender_identities.update_by_emailUpdate a sender identity by emailwrite
Domains8
  • mailersend.domains.createAdd a domainwrite
  • mailersend.domains.deleteDelete a domaindestructive
  • mailersend.domains.dns_recordsGet DNS Recordsread
  • mailersend.domains.getGet a single domainread
  • mailersend.domains.listGet a list of domainsread
  • mailersend.domains.recipientsGet recipients for a domainread
  • mailersend.domains.update_settingsUpdate domain settingswrite
  • mailersend.domains.verification_statusGet verification statusread
Blocklist monitors5
  • mailersend.blocklist_monitors.createCreate a monitorwrite
  • mailersend.blocklist_monitors.deleteDelete a monitordestructive
  • mailersend.blocklist_monitors.getGet a monitorread
  • mailersend.blocklist_monitors.listList monitorsread
  • mailersend.blocklist_monitors.updateUpdate a monitorwrite
Email verification lists5
  • mailersend.email_verification_lists.createCreate a listwrite
  • mailersend.email_verification_lists.getGet a single listread
  • mailersend.email_verification_lists.listGet all listsread
  • mailersend.email_verification_lists.resultsGet list resultsread
  • mailersend.email_verification_lists.verifyVerify a listwrite
Inbound routes5
  • mailersend.inbound_routes.createAdd an inbound routewrite
  • mailersend.inbound_routes.deleteDelete an inbound routedestructive
  • mailersend.inbound_routes.getGet a single inbound routeread
  • mailersend.inbound_routes.listGet a list of inbound routesread
  • mailersend.inbound_routes.updateUpdate an inbound routewrite
SMS inbound routes5
  • mailersend.sms_inbound_routes.createAdd an SMS inbound routewrite
  • mailersend.sms_inbound_routes.deleteDelete an SMS inbound routedestructive
  • mailersend.sms_inbound_routes.getGet a single SMS inbound routeread
  • mailersend.sms_inbound_routes.listGet a list of SMS inbound routesread
  • mailersend.sms_inbound_routes.updateUpdate an inbound routewrite
SMS webhooks5
  • mailersend.sms_webhooks.createCreate an SMS webhookwrite
  • mailersend.sms_webhooks.deleteDelete an SMS webhookdestructive
  • mailersend.sms_webhooks.getGet a single SMS webhookread
  • mailersend.sms_webhooks.listGet a list of SMS webhooksread
  • mailersend.sms_webhooks.updateUpdate a single SMS webhookwrite
SMTP users5
  • mailersend.smtp_users.createAdd SMTP userwrite
  • mailersend.smtp_users.deleteDelete SMTP userdestructive
  • mailersend.smtp_users.getGet a single SMTP userread
  • mailersend.smtp_users.listGet a list of SMTP usersread
  • mailersend.smtp_users.updateUpdate SMTP userwrite
Templates5
  • mailersend.templates.createCreate a templatewrite
  • mailersend.templates.deleteDelete a templatedestructive
  • mailersend.templates.getGet a single templateread
  • mailersend.templates.listGet templatesread
  • mailersend.templates.updateUpdate a templatewrite
Tokens5
  • mailersend.tokens.createCreate a tokenwrite
  • mailersend.tokens.deleteDelete a tokendestructive
  • mailersend.tokens.getShow a tokenread
  • mailersend.tokens.listList tokensread
  • mailersend.tokens.updateUpdate a tokenwrite
Users5
  • mailersend.users.deleteDelete a user from accountdestructive
  • mailersend.users.getGet a single account userread
  • mailersend.users.inviteInvite a user to accountwrite
  • mailersend.users.listGet a list of account usersread
  • mailersend.users.updateUpdate account userwrite
Webhooks5
  • mailersend.webhooks.createCreate a webhookwrite
  • mailersend.webhooks.deleteDelete a webhookdestructive
  • mailersend.webhooks.getGet a webhookread
  • mailersend.webhooks.listGet a list of webhooksread
  • mailersend.webhooks.updateUpdate a webhookwrite
Analytics4
  • mailersend.analytics.by_dateActivity data by dateread
  • mailersend.analytics.opens_by_countryOpens by countryread
  • mailersend.analytics.opens_by_reading_environmentOpens by reading environmentread
  • mailersend.analytics.opens_by_user_agentOpens by user-agent nameread
Invites4
  • mailersend.invites.cancelCancel an invitedestructive
  • mailersend.invites.getGet a single inviteread
  • mailersend.invites.listGet a list of invitesread
  • mailersend.invites.resendResend an invitewrite
SMS numbers4
  • mailersend.sms_numbers.deleteDelete an SMS phone numberdestructive
  • mailersend.sms_numbers.getGet an SMS phone numberread
  • mailersend.sms_numbers.listGet a list of SMS phone numbersread
  • mailersend.sms_numbers.updateUpdate a single SMS phone numberwrite
Blocklist3
  • mailersend.blocklist.addAdd recipients to a suppression list (Blocklist)write
  • mailersend.blocklist.deleteDelete recipients from a suppression list (Blocklist)destructive
  • mailersend.blocklist.listGet recipients from a suppression list (Blocklist)read
Email verification3
  • mailersend.email_verification.async_statusGet async email verification statusread
  • mailersend.email_verification.verify_emailVerify an emailwrite
  • mailersend.email_verification.verify_email_asyncVerify an email (Async)write
Emails3
  • mailersend.emails.getGet a single emailread
  • mailersend.emails.listGet a list of emailsread
  • mailersend.emails.sendSend an emailwrite
Hard bounces3
  • mailersend.hard_bounces.addAdd recipients to a suppression list (Hard Bounces)write
  • mailersend.hard_bounces.deleteDelete recipients from a suppression list (Hard Bounces)destructive
  • mailersend.hard_bounces.listGet recipients from a suppression list (Hard Bounces)read
Recipients3
  • mailersend.recipients.deleteDelete a recipientdestructive
  • mailersend.recipients.getGet a single recipientread
  • mailersend.recipients.listGet recipientsread
Scheduled messages3
  • mailersend.scheduled_messages.deleteDelete a scheduled messagedestructive
  • mailersend.scheduled_messages.getGet a single scheduled messageread
  • mailersend.scheduled_messages.listGet list of scheduled messagesread
SMS recipients3
  • mailersend.sms_recipients.getGet an SMS recipientread
  • mailersend.sms_recipients.listGet a list of SMS recipientsread
  • mailersend.sms_recipients.updateUpdate a single SMS recipientwrite
Spam complaints3
  • mailersend.spam_complaints.addAdd recipients to a suppression list (Spam Complaints)write
  • mailersend.spam_complaints.deleteDelete recipients from a suppression list (Spam Complaints)destructive
  • mailersend.spam_complaints.listGet recipients from a suppression list (Spam Complaints)read
Unsubscribes3
  • mailersend.unsubscribes.addAdd recipients to a suppression list (Unsubscribes)write
  • mailersend.unsubscribes.deleteDelete recipients from a suppression list (Unsubscribes)destructive
  • mailersend.unsubscribes.listGet recipients from a suppression list (Unsubscribes)read
Activities2
  • mailersend.activities.getGet a single activityread
  • mailersend.activities.listGet a list of activitiesread
Bulk emails2
  • mailersend.bulk_emails.getGet bulk email statusread
  • mailersend.bulk_emails.sendSend bulk emailswrite
Messages2
  • mailersend.messages.getGet information for a single message (Request)read
  • mailersend.messages.listGet a list of messages (Request)read
On hold list2
  • mailersend.on_hold_list.deleteDelete recipients from a suppression list (On Hold List)destructive
  • mailersend.on_hold_list.listGet recipients from a suppression list (On Hold List)read
SMS messages2
  • mailersend.sms_messages.getGet an SMS messageread
  • mailersend.sms_messages.listGet a list of SMS messagesread
API quota1
  • mailersend.api_quota.getGet API quotaread
SMS1
  • mailersend.sms.sendSend an SMSwrite
SMS activities1
  • mailersend.sms_activities.listGet a list of activitiesread
Whatsapp1
  • mailersend.whatsapp.sendSend a WhatsApp messagewrite

Questions

The MailerSend MCP server, answered.

Is there a MailerSend MCP server for Claude?

Yes. actionlake is an MCP gateway: a remote MCP server that gives Claude, or another MCP client, 129 MailerSend actions across dmarc monitors, sender identities, domains and blocklist monitors, through the same eight tools it uses for every other connector. actionlake is independent; it is not made or endorsed by MailerSend.

What do I need to connect MailerSend?

MailerSend API token. The free call account { op: "connections.requirements", service: "mailersend" } lists exactly what to paste.

Can an AI agent delete or change things in MailerSend?

Only if its key allows it, and only with an explicit confirmation. 23 MailerSend actions are destructive, including delete a user from account, delete a domain and delete a template. Each runs only with confirm: true. Under the human confirm policy, or an approval rule on the key, the run waits until a named person approves it.

Will an AI agent use up my MailerSend API limit?

actionlake paces every call to the limits in the MailerSend service file: 60 calls a minute per connection. Repeated reads are answered from cache (60 MailerSend actions can be), which never reaches MailerSend.

What does a MailerSend action cost?

One upstream call, the only unit actionlake bills. A list that pages bills one call per page (129 MailerSend actions page). Cache hits, searches, dry runs and calls MailerSend refused with 401, 403, 429 or a 5xx are free. The Free plan includes 100,000 calls a month with no card. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

Which MailerSend API does it cover?

The MailerSend API v1 at api.mailersend.com/v1. It is built from MailerSend's documentation as read on 23 October 2026. 129 actions in 34 areas, each one in the signed service file (version 1.0.0).

Does actionlake keep my MailerSend data, and where?

actionlake processes and stores data in Sydney, Australia; there is no US region yet. Reads may be cached for up to 5 minutes, and a write clears the reads it affects. Each run's request and response is kept, sealed, for your plan's trace window: 1 day on Free, 3 days on Starter, 7 days on Pro, 14 days on Team, 30 days on Business and 30 days on Enterprise. Your MailerSend credential is sealed under your tenant's key, never logged and never returned. Your traffic is not used to train models.

Which AI clients can use it?

Claude Code, tested by us end to end, and the Claude app as a custom connector, tested by us with an existing key. Other MCP clients that support remote servers over Streamable HTTP (MCP revisions 2025-06-18 and 2025-11-25) and OAuth dynamic client registration, or a bearer header, should connect the same way; we have not tested them. Or plain REST, under the same action names.

More connectors like MailerSend

Shares the most action names with

Joins with, on shared entities

Browse

actionlake is independent. It is not made or endorsed by MailerSend; the name is the vendor's own. Counts are from the MailerSend service file, version 1.0.0.

Give your agent MailerSend today.

Connect MailerSend freeSee pricing

Start free - 100,000 calls/month, no card. No signup. Hard caps on every key. Cached answers are free.