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MailBluster for AI agents

MailBluster is an email marketing platform for sending personalized promotional campaigns to large subscriber lists at low cost compared to bigger competitors. 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 MailBlusterSee the 15 actions ↓
MarketingAPI keyMCP + RESTmailbluster.com
AUDIT LOG · MAILBLUSTERPOLICY: acme-support
09:41:07 · claude · u_8f2read
mailbluster.list_fields
List Fields✓ allowed · 212ms
09:41:08 · claude · u_8f2read
mailbluster.get_lead
Get Lead✓ allowed · 164ms
09:41:09 · claude · u_8f2write
mailbluster.create_lead
Create MailBluster Lead✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
mailbluster.delete_lead
Delete MailBluster Lead✕ blocked · policy: deny
EVERY MAILBLUSTER CALL, ON THE RECORD
01 · USE CASES

What agents do in MailBluster.

01

Add a new lead

Create a new lead in MailBluster after a signup form is submitted elsewhere.

02

Look up a lead's details

Pull a lead's record to check their fields and current status before deciding how to follow up.

03

Approve before deleting a lead

Require approval before deleting a lead, since it removes their record permanently.

02 · ACTIONS

15 MailBluster actions, graded by risk.

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

read

6

Look things up. Allowed by default.

  • mailbluster.get_lead
    Get Lead
  • mailbluster.get_order
    Get Order
  • mailbluster.get_product
    Get Product
  • mailbluster.list_fields
    List Fields
  • mailbluster.list_orders
    List Orders
  • mailbluster.list_products
    List Products

write

6

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

  • mailbluster.create_lead
    Create MailBluster Lead
  • mailbluster.update_lead
    Update MailBluster Lead
  • mailbluster.create_order
    Create Order
  • mailbluster.update_order
    Update Order
  • mailbluster.create_product
    Create Product
  • mailbluster.update_product
    MailBluster Update Product

destructive

3

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

  • mailbluster.delete_lead
    Delete MailBluster Lead
  • mailbluster.delete_order
    Delete Order
  • mailbluster.delete_product
    Delete Mailbluster Product
03 · HOW IT WORKS

MailBluster in three steps.

  1. 01Your users connect MailBlusterThey add their MailBluster api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, writes like “create MailBluster Lead” can wait for the user, and “delete MailBluster Lead” can be denied outright.
  3. 03Any agent can actYour agent calls MailBluster 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('mailbluster', {
  read: 'allow',
  write: 'ask',        // create_lead
  destructive: 'deny',  // delete_lead
})

# 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 MailBluster connects.

Users add their MailBluster 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 MailBluster 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 MailBluster 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

MailBluster and Arc0, answered.

Q01

Can I use MailBluster with Claude, ChatGPT or Cursor?

Yes. Connect MailBluster 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 MailBluster actions you allow.

Q02

How do users connect MailBluster?

Users add their MailBluster 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 MailBluster actions can my agent take?

15 in total: 6 read, 6 write and 3 destructive, such as “create MailBluster Lead”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in MailBluster?

Yes. Actions like “delete MailBluster Lead” 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 MailBluster too?

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

Get started

Plug MailBluster into your agent.

Your users connect MailBluster once, under your brand. Your agent gets 15 actions behind your policies, with every call on the record.

Connect MailBlusterBrowse all apps →

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