Connectors · Email & messaging

Mailtrap MCP server for AI agents.

actionlake is an MCP gateway: one remote MCP server that connects Claude and other MCP clients to Mailtrap and the rest of your systems. It gives your agent 136 Mailtrap actions (57 reads, 56 writes and 23 that wait for a confirmation) and holds the Mailtrap credential itself, so the agent never does. It paces Mailtrap's limits and records every call.

Connect Mailtrap free See 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

136actionsin one signed file
57readlook, never change
56writecreate and update
23wait for a yesdestructive, confirmed first

Set up

Connect Mailtrap in three steps.

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
02
Connect Mailtrap.
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.
- api_tokenMailtrap API token
```
account { op: "connections.requirements", service: "mailtrap" }
# free: exactly what to paste, and what is found for you
```

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: "mailtrap.contacts.list" }# get a list of contacts · read · 1 upstream callcheck { action: "mailtrap.contacts.create", input: { … } }# free: inputs, permissions, cost and confirmations, nothing sent

Mailtrap 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: api_token
Limits we pace to: 150 calls per 10 seconds, per connection
API covered: Mailtrap API (official OpenAPI 3.1 specs, mailtrap/mailtrap-openapi)mailtrap.io
Built from: Mailtrap's documentation, read 23 October 2026GitHub docs.mailtrap.io
Service file: Version 1.0.0, signed (Ed25519)
Cached reads: 51 of 57 reads, for up to 5 minutes; a write clears what it affects
Shared entities: 5, so ask can line Mailtrap up with your other systems
Data: Processed and stored in Sydney, Australia. No US region yet

Capabilities

What an AI agent can do in Mailtrap.

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

57readlook, never change
56writecreate and update
23destructivewait for a confirmation

Email campaigns
11
3 read · 5 write · 3 destructive
Get a list of email campaigns · Create an email campaign · Get an email campaign by ID · Update an email campaign
Sandboxes
10
2 read · 6 write · 2 destructive
Create a sandbox · Get a list of sandboxes · Get sandbox attributes · Mark as read
Sandbox messages
8
5 read · 2 write · 1 destructive
Forward message · Get messages · Show email message · Get message HTML analysis
Inbound messages
6
2 read · 3 write · 1 destructive
List messages · Get a message · Delete a message · Forward a message
Sending domains
6
2 read · 3 write · 1 destructive
List domains · Create domain · Get domain · Update domain
API tokens
5
2 read · 2 write · 1 destructive
Create API token · List API tokens · Get API token · Reset API token
Campaign templates
5
2 read · 2 write · 1 destructive
Create Email Template (Experimental) · Get a paginated list of Email Templates (Experimental) · Get Email Template (Experimental) · Update Email Template (Experimental)
Contact fields
5
2 read · 2 write · 1 destructive
Create Contact Field · Get all Contact Fields · Get Contact Field · Update Contact Field

26 more areas · 80 actions

Contact lists 5
Contacts 5
Email templates 5
Inbound folders 5
Inbound forward rules 5
Inbound inboxes 5
Projects 5
Sending stats 5
Webhooks 5
Account accesses 3
Domain company info 3
Inbound threads 3
Suppressions 3
Tracking opt outs 3
Bulk emails 2
Contact exports 2
Contact imports 2
Email logs 2
Sandbox attachments 2
Sandbox emails 2
Sub accounts 2
Transactional emails 2
Accounts 1
Billing 1
Contact events 1
Permission resources 1

Top actions

The Mailtrap API, shaped for agents.

The ids your agent types, what each does, and the one name it shares with other systems. 44 of Mailtrap's 44 action names are shared with at least one other connector, so an agent learns them once.

Action	What it does	Effect	Same name in
`mailtrap.contacts.list`Get a list of contacts	Get a list of contacts.	read	`crm.contact.list`177 connectors
`mailtrap.inbound_messages.list`List messages	List messages.	read	`comm.email.list`28 connectors
`mailtrap.sending_domains.list`List domains	List domains.	read	`comm.sending_domain.list`18 connectors
`mailtrap.contact_lists.list`Get all Contact Lists	Get all Contact Lists.	read	`crm.contact_list.list`34 connectors
`mailtrap.contacts.create`Create a new Contact	Create a new Contact.	write	`crm.contact.create`161 connectors
`mailtrap.transactional_emails.send`Send transactional email	Send transactional email.	write	`comm.email.send`32 connectors
`mailtrap.inbound_inboxes.list`List inboxes	List inboxes.	read	`comm.mailbox.list`18 connectors
`mailtrap.sending_domains.create`Create domain	Create domain.	write	`comm.sending_domain.create`15 connectors
`mailtrap.contacts.delete`Delete contact	Delete contact.	destructive	`crm.contact.delete`147 connectors
`mailtrap.contact_lists.create`Create Contact List	Create Contact List.	write	`crm.contact_list.create`29 connectors
`mailtrap.email_templates.create`Create Email Template	Create Email Template.	write	`comm.email_template.create`34 connectors
`mailtrap.inbound_inboxes.create`Create an inbox	Create an inbox.	write	`comm.mailbox.create`15 connectors

Try it

Prompts to paste into Claude.

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

Readread
Find the Mailtrap contacts with no email address, so we can clean them up.
callsmailtrap.contacts.list
Writewrite
Create a new Contact in Mailtrap. Show me exactly what you will send before you save it.
callsmailtrap.contacts.create
Across systemsread
Which contacts are in both Mailtrap and HaloPSA, and how many are in only one of them?
callsmailtrap.contacts.listhalopsa.users.list

Across your systems

Mailtrap, joined to the rest of your business.

One ask fetches from Mailtrap and another system, joins the rows on the same customer on our side, and hands your agent the answer, not every row.

Which contacts are in both Mailtrap and HaloPSA, and how many are in only one of them?
mailtrap.contacts.list + halopsa.users.list, on crm.contact · HaloPSA
Which contacts are in both Mailtrap and NetSuite, and how many are in only one of them?
mailtrap.contacts.list + netsuite.views.contacts, on crm.contact · NetSuite

Also mapped by other connectorscrm.contact 192crm.contact_list 22comm.email 15comm.mailbox 14comm.sending_domain 12

ask

ask {  intent: "which contacts are in both Mailtrap and HaloPSA, and how many are in only one of them",  steps: [    { action: "mailtrap.contacts.list", as: "people", input: {}, limit: 100, max_pages: 5 },    { action: "halopsa.users.list", as: "people2", input: {}, limit: 100, max_pages: 5 },    { join: {        left: "people",        right: "people2",        on: "crm.contact",        group_by: "people.email",        select: ["people.email", "count(people2.id) as in_halopsa"]    } }  ]}

Example. Run it through check first: it validates the steps and prices them, and it is free.

Governance for Mailtrap

Destructive actions wait for a yes.

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

Delete contactmailtrap.contacts.delete
Delete a messagemailtrap.inbound_messages.delete
Delete domainmailtrap.sending_domains.delete
Delete Contact Listmailtrap.contact_lists.delete
Delete Email Templatemailtrap.email_templates.delete
Delete an inboxmailtrap.inbound_inboxes.delete
Delete an email campaignmailtrap.email_campaigns.delete
Cancel a scheduled email campaignmailtrap.email_campaigns.cancel
Delete a threadmailtrap.inbound_threads.delete
Delete a webhookmailtrap.webhooks.delete
Clean sandboxmailtrap.sandboxes.clean
Delete a sandboxmailtrap.sandboxes.delete
Delete messagemailtrap.sandbox_messages.delete
Delete projectmailtrap.projects.delete
Delete API tokenmailtrap.api_tokens.delete
Delete suppressionmailtrap.suppressions.delete
Delete Contact Fieldmailtrap.contact_fields.delete
Delete a foldermailtrap.inbound_folders.delete
Remove account accessmailtrap.account_accesses.delete
Delete tracking opt-outmailtrap.tracking_opt_outs.delete
Delete Email Template (Experimental)mailtrap.campaign_templates.delete
Delete a forward rulemailtrap.inbound_forward_rules.delete
Terminate a sending email campaignmailtrap.email_campaigns.terminate

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.

domailtrap.contacts.deleteconfirm_policy: human

Delete contact?

intent: the user asked me to delete contact

run suspended · waiting for a named person · key mailtrap-agent cannot confirm itself

In the console, or from an emailed signed link.

a key for this connector

account {  op: "keys.create", name: "mailtrap-agent",  allowed_actions: ["mailtrap.*"], cap_calls: 2000,  confirm_policy: "human_for_writes",  approval_rules: [    { match: "mailtrap.contacts.delete", approver: "[email protected]" },    { match: "mailtrap.inbound_messages.delete", approver: "[email protected]" },    { match: "mailtrap.sending_domains.delete", approver: "[email protected]" }  ]}

Illustrative. Scoped to Mailtrap only, capped at 2,000 upstream calls, every write confirmed, and the destructive ones approved by a named person.

Cost

What Mailtrap costs on actionlake.

Every Mailtrap action is one upstream call, the only thing actionlake bills. Searching, check, cost, account and any call Mailtrap 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 136 Mailtrap actions
136actions pageeach page of a long list is one call
51reads 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 Mailtrap action.

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

Email campaigns11

mailtrap.email_campaigns.cancelCancel a scheduled email campaigndestructive
mailtrap.email_campaigns.createCreate an email campaignwrite
mailtrap.email_campaigns.deleteDelete an email campaigndestructive
mailtrap.email_campaigns.getGet an email campaign by IDread
mailtrap.email_campaigns.get_statsGet email campaign statisticsread
mailtrap.email_campaigns.listGet a list of email campaignsread
mailtrap.email_campaigns.resetReset an email campaign to draftwrite
mailtrap.email_campaigns.scheduleSchedule an email campaignwrite
mailtrap.email_campaigns.startStart an email campaignwrite
mailtrap.email_campaigns.terminateTerminate a sending email campaigndestructive
mailtrap.email_campaigns.updateUpdate an email campaignwrite

Sandboxes10

mailtrap.sandboxes.cleanClean sandboxdestructive
mailtrap.sandboxes.createCreate a sandboxwrite
mailtrap.sandboxes.deleteDelete a sandboxdestructive
mailtrap.sandboxes.getGet sandbox attributesread
mailtrap.sandboxes.listGet a list of sandboxesread
mailtrap.sandboxes.mark_all_readMark as readwrite
mailtrap.sandboxes.reset_credentialsReset credentialswrite
mailtrap.sandboxes.reset_email_addressReset email addresswrite
mailtrap.sandboxes.toggle_email_addressEnable email addresswrite
mailtrap.sandboxes.updateUpdate a sandboxwrite

Sandbox messages8

mailtrap.sandbox_messages.deleteDelete messagedestructive
mailtrap.sandbox_messages.forwardForward messagewrite
mailtrap.sandbox_messages.getShow email messageread
mailtrap.sandbox_messages.get_html_analysisGet message HTML analysisread
mailtrap.sandbox_messages.get_mail_headersGet mail headersread
mailtrap.sandbox_messages.get_spam_reportGet message spam scoreread
mailtrap.sandbox_messages.listGet messagesread
mailtrap.sandbox_messages.updateUpdate messagewrite

Inbound messages6

mailtrap.inbound_messages.deleteDelete a messagedestructive
mailtrap.inbound_messages.forwardForward a messagewrite
mailtrap.inbound_messages.getGet a messageread
mailtrap.inbound_messages.listList messagesread
mailtrap.inbound_messages.replyReply to a messagewrite
mailtrap.inbound_messages.reply_allReply all to a messagewrite

Sending domains6

mailtrap.sending_domains.createCreate domainwrite
mailtrap.sending_domains.deleteDelete domaindestructive
mailtrap.sending_domains.getGet domainread
mailtrap.sending_domains.listList domainsread
mailtrap.sending_domains.send_setup_instructionsSend setup instructionswrite
mailtrap.sending_domains.updateUpdate domainwrite

API tokens5

mailtrap.api_tokens.createCreate API tokenwrite
mailtrap.api_tokens.deleteDelete API tokendestructive
mailtrap.api_tokens.getGet API tokenread
mailtrap.api_tokens.listList API tokensread
mailtrap.api_tokens.resetReset API tokenwrite

Campaign templates5

mailtrap.campaign_templates.createCreate Email Template (Experimental)write
mailtrap.campaign_templates.deleteDelete Email Template (Experimental)destructive
mailtrap.campaign_templates.getGet Email Template (Experimental)read
mailtrap.campaign_templates.listGet a paginated list of Email Templates (Experimental)read
mailtrap.campaign_templates.updateUpdate Email Template (Experimental)write

Contact fields5

mailtrap.contact_fields.createCreate Contact Fieldwrite
mailtrap.contact_fields.deleteDelete Contact Fielddestructive
mailtrap.contact_fields.getGet Contact Fieldread
mailtrap.contact_fields.listGet all Contact Fieldsread
mailtrap.contact_fields.updateUpdate Contact Fieldwrite

Contact lists5

mailtrap.contact_lists.createCreate Contact Listwrite
mailtrap.contact_lists.deleteDelete Contact Listdestructive
mailtrap.contact_lists.getGet Contact Listread
mailtrap.contact_lists.listGet all Contact Listsread
mailtrap.contact_lists.updateUpdate Contact Listwrite

Contacts5

mailtrap.contacts.createCreate a new Contactwrite
mailtrap.contacts.deleteDelete contactdestructive
mailtrap.contacts.getGet contactread
mailtrap.contacts.listGet a list of contactsread
mailtrap.contacts.updateUpdate contactwrite

Email templates5

mailtrap.email_templates.createCreate Email Templatewrite
mailtrap.email_templates.deleteDelete Email Templatedestructive
mailtrap.email_templates.getGet Email Templateread
mailtrap.email_templates.listGet all Email Templatesread
mailtrap.email_templates.updateUpdate Email Templatewrite

Inbound folders5

mailtrap.inbound_folders.createCreate a folderwrite
mailtrap.inbound_folders.deleteDelete a folderdestructive
mailtrap.inbound_folders.getGet a folderread
mailtrap.inbound_folders.listList foldersread
mailtrap.inbound_folders.updateUpdate a folderwrite

Inbound forward rules5

mailtrap.inbound_forward_rules.createCreate a forward rulewrite
mailtrap.inbound_forward_rules.deleteDelete a forward ruledestructive
mailtrap.inbound_forward_rules.getGet a forward ruleread
mailtrap.inbound_forward_rules.listList forward rulesread
mailtrap.inbound_forward_rules.updateUpdate a forward rulewrite

Inbound inboxes5

mailtrap.inbound_inboxes.createCreate an inboxwrite
mailtrap.inbound_inboxes.deleteDelete an inboxdestructive
mailtrap.inbound_inboxes.getGet an inboxread
mailtrap.inbound_inboxes.listList inboxesread
mailtrap.inbound_inboxes.updateUpdate an inboxwrite

Projects5

mailtrap.projects.createCreate projectwrite
mailtrap.projects.deleteDelete projectdestructive
mailtrap.projects.getGet project by IDread
mailtrap.projects.listGet a list of projectsread
mailtrap.projects.updateUpdate projectwrite

Sending stats5

mailtrap.sending_stats.by_categoryGet Sending Stats by Categoriesread
mailtrap.sending_stats.by_dateGet Sending Stats by Dateread
mailtrap.sending_stats.by_domainGet Sending Stats by Domainsread
mailtrap.sending_stats.by_email_service_providerGet Sending Stats by Email Service Providersread
mailtrap.sending_stats.getGet Sending Statsread

Webhooks5

mailtrap.webhooks.createCreate a webhookwrite
mailtrap.webhooks.deleteDelete a webhookdestructive
mailtrap.webhooks.getGet a webhookread
mailtrap.webhooks.listList webhooksread
mailtrap.webhooks.updateUpdate a webhookwrite

Account accesses3

mailtrap.account_accesses.deleteRemove account accessdestructive
mailtrap.account_accesses.listList User & Invite account accessesread
mailtrap.account_accesses.update_permissionsManage user or token permissionswrite

Domain company info3

mailtrap.domain_company_info.createCreate company infowrite
mailtrap.domain_company_info.getGet company inforead
mailtrap.domain_company_info.updateUpdate company infowrite

Inbound threads3

mailtrap.inbound_threads.deleteDelete a threaddestructive
mailtrap.inbound_threads.getGet a threadread
mailtrap.inbound_threads.listList threadsread

Suppressions3

mailtrap.suppressions.createCreate suppressionwrite
mailtrap.suppressions.deleteDelete suppressiondestructive
mailtrap.suppressions.listList suppressionsread

Tracking opt outs3

mailtrap.tracking_opt_outs.createCreate tracking opt-outwrite
mailtrap.tracking_opt_outs.deleteDelete tracking opt-outdestructive
mailtrap.tracking_opt_outs.listList tracking opt-outsread

Bulk emails2

mailtrap.bulk_emails.sendSend bulk emailwrite
mailtrap.bulk_emails.send_batchBatch send emailswrite

Contact exports2

mailtrap.contact_exports.createCreate Contact Exportwrite
mailtrap.contact_exports.getGet Contact Exportread

Contact imports2

mailtrap.contact_imports.createImport contactswrite
mailtrap.contact_imports.getGet Contact Importread

Email logs2

mailtrap.email_logs.getGet an email log message by IDread
mailtrap.email_logs.listList email logsread

Sandbox attachments2

mailtrap.sandbox_attachments.getGet single attachmentread
mailtrap.sandbox_attachments.listGet attachmentsread

Sandbox emails2

mailtrap.sandbox_emails.sendSend email (including templates)write
mailtrap.sandbox_emails.send_batchBatch send email (including templates)write

Sub accounts2

mailtrap.sub_accounts.createCreate organization sub accountwrite
mailtrap.sub_accounts.listGet organization sub accountsread

Transactional emails2

mailtrap.transactional_emails.sendSend transactional emailwrite
mailtrap.transactional_emails.send_batchBatch send emailswrite

Accounts1

mailtrap.accounts.listList account(s) you have access toread

Billing1

mailtrap.billing.get_usageGet current billing cycle usageread

Contact events1

mailtrap.contact_events.createCreate contact eventwrite

Permission resources1

mailtrap.permission_resources.listGet resourcesread

Questions

The Mailtrap MCP server, answered.

Is there a Mailtrap MCP server for Claude?

Yes. actionlake is an MCP gateway: a remote MCP server that gives Claude, or another MCP client, 136 Mailtrap actions across email campaigns, sandboxes, sandbox messages and inbound messages, through the same eight tools it uses for every other connector. actionlake is independent; it is not made or endorsed by Mailtrap.

What do I need to connect Mailtrap?

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

Can an AI agent delete or change things in Mailtrap?

Only if its key allows it, and only with an explicit confirmation. 23 Mailtrap actions are destructive, including delete contact, delete a message and delete domain. 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 Mailtrap API limit?

actionlake paces every call to the limits in the Mailtrap service file: 150 calls per 10 seconds per connection. Repeated reads are answered from cache (51 Mailtrap actions can be), which never reaches Mailtrap.

What does a Mailtrap action cost?

One upstream call, the only unit actionlake bills. A list that pages bills one call per page (136 Mailtrap actions page). Cache hits, searches, dry runs and calls Mailtrap 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 Mailtrap API does it cover?

The Mailtrap API (official OpenAPI 3.1 specs, mailtrap/mailtrap-openapi) at mailtrap.io. It is built from Mailtrap's documentation as read on 23 October 2026. 136 actions in 34 areas, each one in the signed service file (version 1.0.0).

Can I combine Mailtrap with my other systems?

Yes. ask joins Mailtrap to HaloPSA or NetSuite on the same customer and returns the answer rather than every row. Mailtrap maps crm.contact, which 192 other connectors also map.

Does actionlake keep my Mailtrap 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 Mailtrap 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.

Give your agent Mailtrap today.

Connect Mailtrap free See pricing

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

Mailtrap MCP server for AI agents.

Connect Mailtrap in three steps.

Add actionlake to Claude.

Connect Mailtrap.

Make the first call. Check before a write.

What an AI agent can do in Mailtrap.

Email campaigns

Sandboxes

Sandbox messages

Inbound messages

Sending domains

API tokens

Campaign templates

Contact fields