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Enginemailer for AI agents

Enginemailer is an email marketing platform for managing contacts, building campaigns, and sending personalized email at scale, used by marketing teams running ongoing customer communications. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.

Connect EnginemailerSee the 38 actions ↓
MarketingAPI keyMCP + RESTenginemailer.com
AUDIT LOG · ENGINEMAILERPOLICY: acme-support
09:41:07 · claude · u_8f2read
enginemailer.list_forms
List Forms✓ allowed · 212ms
09:41:08 · claude · u_8f2read
enginemailer.list_pages
List Pages✓ allowed · 164ms
09:41:09 · claude · u_8f2write
enginemailer.create_campaign
Create Campaign✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
enginemailer.delete_campaign
Delete Campaign✕ blocked · policy: deny
EVERY ENGINEMAILER CALL, ON THE RECORD
01 · USE CASES

What agents do in Enginemailer.

01

Find a subscriber's record

Find a subscriber by email to check their status before adding them to a new campaign.

02

Check a campaign's list

Get a campaign's linked list to confirm it targets the right audience before it runs.

03

Confirm before deleting a subscriber

Require approval before deleting a subscriber, since it removes their history from past campaigns.

02 · ACTIONS

38 Enginemailer actions, graded by risk.

Every Enginemailer action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.

read

20

Look things up. Allowed by default.

  • enginemailer.list_forms
    List Forms
  • enginemailer.list_pages
    List Pages
  • enginemailer.list_popups
    List Popups
  • enginemailer.get_subscriber
    Get Subscriber
  • enginemailer.list_campaigns
    List Campaigns
  • enginemailer.list_templates
    List Templates
  • enginemailer.find_subscriber
    Find Subscriber
  • enginemailer.get_subcategory
    Get Subcategories
  • enginemailer.get_listcampaign
    Get List Campaign
  • enginemailer.get_getcustomfield
    Get Custom Field List
  • enginemailer.get_new_subscribers
    Get New Subscribers
  • enginemailer.list_autoresponders
    List Autoresponders
  • enginemailer.get_subscribers_tagged
    Get Subscribers Tagged
  • enginemailer.get_subscribers_deleted
    Get Deleted Subscribers
  • enginemailer.get_subscribers_modified
    Get Subscribers Modified
  • enginemailer.get_subscribers_untagged
    Get Untagged Subscribers
+ 4 MORE

write

12

Create and change things. Allow, or ask the user first.

  • enginemailer.send_campaign
    Send Campaign
  • enginemailer.create_campaign
    Create Campaign
  • enginemailer.post_updatecategory
    Create/Update Category
  • enginemailer.add_update_subscriber
    Add or Update Subscriber
  • enginemailer.post_update_subscriber
    Update Subscriber
  • enginemailer.connect
    Test API Connection
  • enginemailer.pause_campaign
    Pause Campaign
  • enginemailer.insert_subscriber
    Insert Subscriber
  • enginemailer.tag_to_subcategory
    Tag Subscriber to Subcategory
  • enginemailer.activate_subscriber
    Activate Subscriber
  • enginemailer.batch_update_status
    Check Batch Update Status
  • enginemailer.batch_update_subscribers
    Batch Update Subscribers

destructive

6

Delete, cancel or archive. Ask first, or deny outright.

  • enginemailer.delete_campaign
    Delete Campaign
  • enginemailer.delete_subscriber
    Delete Subscriber
  • enginemailer.delete_recipient_list
    Delete Recipient List
  • enginemailer.unsubscribe
    Unsubscribe (N8N)
  • enginemailer.get_unsubscribe
    Get Unsubscribe Events
  • enginemailer.unsubscribe_subscriber
    Unsubscribe Subscriber
03 · HOW IT WORKS

Enginemailer in three steps.

  1. 01Your users connect EnginemailerThey add their Enginemailer api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, writes like “create Campaign” can wait for the user, and “delete Campaign” can be denied outright.
  3. 03Any agent can actYour agent calls Enginemailer through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
POLICY.TS
await arc0.policies.set('enginemailer', {
  read: 'allow',
  write: 'ask',        // create_campaign
  destructive: 'deny',  // delete_campaign
})

# Claude Code: the same connection, one URL
$ claude mcp add --transport http arc0 \
    https://mcp.arc0.ai/u/u_8f2
04 · AUTH AND DATA

How Enginemailer connects.

Users add their Enginemailer api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

The same Enginemailer connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →

AUTH
API key
CREDENTIALS
Per-tenant encrypted vault
MODEL SEES
Results only, never credentials
AUDIT LOG
Every call, on every plan
05 · WORKS WITH

Use Enginemailer from any agent.

Claude
ChatGPT
Cursor
Codex
VS Code
OpenAI Agents SDK
Claude Agent SDK
Vercel AI SDK
Mastra
LangGraph
06 · RELATED

More marketing apps.

Meta Ads67 actionsActiveCampaign298 actionsActiveTrail159 actionsAdobe Marketing Agent12 actionsAdtraction22 actionsAdyntel8 actionsAhrefs40 actionsAirOps96 actions
ALL MARKETING APPS →
07 · FAQ

Enginemailer and Arc0, answered.

Q01

Can I use Enginemailer with Claude, ChatGPT or Cursor?

Yes. Connect Enginemailer to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the Enginemailer actions you allow.

Q02

How do users connect Enginemailer?

Users add their Enginemailer api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

Q03

Which Enginemailer actions can my agent take?

38 in total: 20 read, 12 write and 6 destructive, such as “create Campaign”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Enginemailer?

Yes. Actions like “delete Campaign” are graded destructive. Set destructive actions to deny, or to ask so the user approves each one, and blocked calls still show up on the audit log.

Q05

Can my own backend call Enginemailer too?

Yes. The same Enginemailer connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.

Get started

Plug Enginemailer into your agent.

Your users connect Enginemailer once, under your brand. Your agent gets 38 actions behind your policies, with every call on the record.

Connect EnginemailerBrowse all apps →

Free to build · MCP + REST · Audit log on every plan