Get started

Sendfox for AI agents

Sendfox is an email marketing tool built for content creators, handling contact lists, campaigns, automations, and simple signup forms at a lower price point. 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 SendfoxSee the 17 actions ↓
MarketingAPI keyMCP + RESTsendfox.com
AUDIT LOG · SENDFOXPOLICY: acme-support
09:41:07 · claude · u_8f2read
sendfox.list_contact_fields
List Contact Fields✓ allowed · 212ms
09:41:08 · claude · u_8f2read
sendfox.get_forms
Get Forms✓ allowed · 164ms
09:41:09 · claude · u_8f2write
sendfox.post_create_list
Create List✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
sendfox.delete_contact_from_list
Delete Contact from List✕ blocked · policy: deny
EVERY SENDFOX CALL, ON THE RECORD
01 · USE CASES

What agents do in Sendfox.

01

Get contacts in a list

Reads the contacts belonging to a specific list before adding them to a new campaign.

02

Check a campaign's details

Looks up a past campaign's content and stats before deciding whether to send something similar.

03

Unsubscribe a contact only after confirmation

Removes a contact from active campaigns only once their unsubscribe request has been confirmed.

02 · ACTIONS

17 Sendfox actions, graded by risk.

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

read

13

Look things up. Allowed by default.

  • sendfox.get_forms
    Get Forms
  • sendfox.get_lists
    Get Lists
  • sendfox.get_contacts
    Get Contacts
  • sendfox.get_campaigns
    Get Campaigns
  • sendfox.get_list_by_id
    Get List by ID
  • sendfox.get_automations
    Get Automations
  • sendfox.get_current_user
    Get Current User
  • sendfox.get_contact_by_id
    Get Contact by ID
  • sendfox.get_campaign_by_id
    Get Campaign by ID
  • sendfox.get_contact_fields
    Get Contact Fields
  • sendfox.list_contact_fields
    List Contact Fields
  • sendfox.get_contacts_in_list
    Get Contacts in List
  • sendfox.list_unsubscribed_contacts
    List Unsubscribed Contacts

write

2

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

  • sendfox.post_create_list
    Create List
  • sendfox.post_create_contact
    Create Contact

destructive

2

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

  • sendfox.delete_contact_from_list
    Delete Contact from List
  • sendfox.patch_unsubscribe_contact
    Unsubscribe Contact
03 · HOW IT WORKS

Sendfox in three steps.

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

# 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 Sendfox connects.

Users add their Sendfox 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 Sendfox 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 Sendfox 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

Sendfox and Arc0, answered.

Q01

Can I use Sendfox with Claude, ChatGPT or Cursor?

Yes. Connect Sendfox 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 Sendfox actions you allow.

Q02

How do users connect Sendfox?

Users add their Sendfox 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 Sendfox actions can my agent take?

17 in total: 13 read, 2 write and 2 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 Sendfox?

Yes. Actions like “delete Contact from List” 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 Sendfox too?

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

Get started

Plug Sendfox into your agent.

Your users connect Sendfox once, under your brand. Your agent gets 17 actions behind your policies, with every call on the record.

Connect SendfoxBrowse all apps →

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