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Mailsoftly for AI agents

Mailsoftly is an email marketing platform for creating, scheduling, and managing campaigns with contact lists and custom fields for growing audiences. 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 MailsoftlySee the 20 actions ↓
MarketingAPI keyMCP + RESTmailsoftly.com
AUDIT LOG · MAILSOFTLYPOLICY: acme-support
09:41:07 · claude · u_8f2read
mailsoftly.search_contacts
Search Contacts✓ allowed · 212ms
09:41:08 · claude · u_8f2read
mailsoftly.get_tags
Get Tags✓ allowed · 164ms
09:41:09 · claude · u_8f2write
mailsoftly.create_emails
Create Email Drafts✓ approved · approved by user
EVERY MAILSOFTLY CALL, ON THE RECORD
01 · USE CASES

What agents do in Mailsoftly.

01

Add a contact to a list

Create a contact and add them to the right contact list based on signup source.

02

Check a contact's details

Look up a contact's fields and tags before deciding how to segment them, read-only.

03

Draft an email for review

Create an email draft so a team member can review it before it sends.

02 · ACTIONS

20 Mailsoftly actions, graded by risk.

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

read

10

Look things up. Allowed by default.

  • mailsoftly.get_tags
    Get Tags
  • mailsoftly.get_contact
    Get Contact
  • mailsoftly.get_contacts
    Get Contacts
  • mailsoftly.search_contacts
    Search Contacts
  • mailsoftly.get_contact_list
    Get Contact List
  • mailsoftly.get_email_status
    Get Email Status
  • mailsoftly.get_contact_lists
    Get Contact Lists
  • mailsoftly.get_custom_fields
    Get Custom Fields
  • mailsoftly.get_contact_fields
    Get Contact Fields
  • mailsoftly.get_contact_list_contacts
    Get Contact List Contacts

write

10

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

  • mailsoftly.send_email
    Send Email
  • mailsoftly.create_emails
    Create Email Drafts
  • mailsoftly.create_contact
    Create Contact
  • mailsoftly.update_contact
    Update Contact
  • mailsoftly.create_contact_list
    Create Contact List
  • mailsoftly.create_or_update_contact
    Create or Update Contact
  • mailsoftly.add_contact_to_contact_list
    Add Contact to Contact List
  • mailsoftly.add_custom_field_to_contact
    Add Custom Field to Contact
  • mailsoftly.authenticate_firm
    Authenticate Firm
  • mailsoftly.assign_tags_to_contact
    Assign Tags to Contact

destructive

0

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

  • No destructive actions.
03 · HOW IT WORKS

Mailsoftly in three steps.

  1. 01Your users connect MailsoftlyThey add their Mailsoftly api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, and writes like “create Email Drafts” can wait for the user to approve.
  3. 03Any agent can actYour agent calls Mailsoftly 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('mailsoftly', {
  read: 'allow',
  write: 'ask',        // create_emails
  destructive: 'deny',  
})

# 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 Mailsoftly connects.

Users add their Mailsoftly 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 Mailsoftly 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 Mailsoftly 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

Mailsoftly and Arc0, answered.

Q01

Can I use Mailsoftly with Claude, ChatGPT or Cursor?

Yes. Connect Mailsoftly 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 Mailsoftly actions you allow.

Q02

How do users connect Mailsoftly?

Users add their Mailsoftly 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 Mailsoftly actions can my agent take?

20 in total: 10 read, 10 write and 0 destructive, such as “create Email Drafts”. Your policies decide which of them each agent may call.

Q04

Can I make my agent read-only in Mailsoftly?

Yes. Allow read actions and deny writes in the Mailsoftly policy. Your agent can still look things up, and any write it attempts is blocked and logged.

Q05

Can my own backend call Mailsoftly too?

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

Get started

Plug Mailsoftly into your agent.

Your users connect Mailsoftly once, under your brand. Your agent gets 20 actions behind your policies, with every call on the record.

Connect MailsoftlyBrowse all apps →

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