Unisender for AI agents

UniSender runs email and SMS marketing campaigns, used by small businesses managing subscriber lists and sending newsletters or promotions. 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 Unisender See the 33 actions ↓

MarketingAPI keyMCP + RESTunisender.com

AUDIT LOG · UNISENDERPOLICY: acme-support

09:41:07 · claude · u_8f2read

unisender.list_messages

List Messages✓ allowed · 212ms

09:41:08 · claude · u_8f2read

unisender.get_tags

Get Tags✓ allowed · 164ms

09:41:09 · claude · u_8f2write

unisender.create_list

Create List✓ approved · approved by user

09:41:12 · claude · u_8f2destructive

unisender.delete_tag

Delete Tag✕ blocked · policy: deny

EVERY UNISENDER CALL, ON THE RECORD

01 · USE CASES

What agents do in Unisender.

Get a campaign's status

Check whether a campaign has sent and how it performed, a read-only lookup.

Subscribe a contact to a list

Add a contact to a mailing list ahead of a campaign.

Confirm before deleting a list

Check with the user before deleting a subscriber list, since its contacts and history go with it.

02 · ACTIONS

33 Unisender actions, graded by risk.

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

read

Look things up. Allowed by default.

unisender.get_tags
Get Tags
unisender.get_lists
Get Lists
unisender.get_fields
Get Fields
unisender.get_contact
Get Contact
unisender.get_messages
Get Messages
unisender.get_template
Get Template
unisender.get_campaigns
Get Campaigns
unisender.get_templates
Get Templates
unisender.list_messages
List Messages
unisender.list_templates
List Templates
unisender.get_campaign_status
Get Campaign Status
unisender.get_sender_domain_list
Get Sender Domain List
unisender.get_contact_field_values
Get Contact Field Values
unisender.check_email
Check Email Status
unisender.export_contacts
Export Contacts

write

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

unisender.create_list
Create List
unisender.update_list
Update List
unisender.create_field
Create Field
unisender.update_field
Update Field
unisender.create_email_template
Create Email Template
unisender.update_email_template
Update Email Template
unisender.create_subscriber_note
Create Subscriber Note
unisender.update_subscriber_note
Update Subscriber Note
unisender.exclude
Exclude Contact from Lists
unisender.subscribe
Subscribe Contact to Lists
unisender.import_contacts
Import Contacts (Bulk)
unisender.is_contact_in_lists
Check if Contact is in Lists

destructive

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

unisender.delete_tag
Delete Tag
unisender.delete_list
Delete List
unisender.delete_field
Delete Field
unisender.delete_template
Delete Template
unisender.delete_subscriber_note
Delete Subscriber Note
unisender.unsubscribe
Unsubscribe Contact

03 · HOW IT WORKS

Unisender in three steps.

01Your users connect UnisenderThey add their Unisender api key on Arc0 Connect, under your brand. It goes straight into the vault.
02You set the rulesReads run, writes like “create List” can wait for the user, and “delete Tag” can be denied outright.
03Any agent can actYour agent calls Unisender 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('unisender', {
  read: 'allow',
  write: 'ask',        // create_list
  destructive: 'deny',  // delete_tag
})

# 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 Unisender connects.

Users add their Unisender 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 Unisender 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 Unisender 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 actions

ActiveCampaign298 actions ActiveTrail159 actions

Adobe Marketing Agent12 actions

07 · FAQ

Unisender and Arc0, answered.

Q01

Can I use Unisender with Claude, ChatGPT or Cursor?

Yes. Connect Unisender 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 Unisender actions you allow.

Q02

How do users connect Unisender?

Users add their Unisender 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 Unisender actions can my agent take?

33 in total: 15 read, 12 write and 6 destructive, such as “create List”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Unisender?

Yes. Actions like “delete Tag” 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 Unisender too?

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

Get started

Plug Unisender into your agent.

Your users connect Unisender once, under your brand. Your agent gets 33 actions behind your policies, with every call on the record.

Connect Unisender Browse all apps →

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