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Mixmax for AI agents

Mixmax is a sales engagement platform for Gmail that adds email tracking, scheduling, and outreach sequences for sales teams working inbox-first. 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 MixmaxSee the 94 actions ↓
EmailAPI keyMCP + RESTmixmax.com
AUDIT LOG · MIXMAXPOLICY: acme-support
09:41:07 · claude · u_8f2read
mixmax.list_contacts
List Contacts✓ allowed · 212ms
09:41:08 · claude · u_8f2read
mixmax.get_qa
Get Q&A Surveys✓ allowed · 164ms
09:41:09 · claude · u_8f2write
mixmax.create_rule
Create Rule✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
mixmax.delete_rule
Delete Rule✕ blocked · policy: deny
EVERY MIXMAX CALL, ON THE RECORD
01 · USE CASES

What agents do in Mixmax.

01

Add a contact to a sequence group

Add a new contact to a group so they enter the right outreach sequence.

02

Check a sequence's recipients

Look up who is currently in a sequence before deciding on a change, read-only.

03

Approve before canceling recipients

Require approval before canceling recipients from a sequence, since it stops their scheduled follow-ups.

02 · ACTIONS

94 Mixmax actions, graded by risk.

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

read

41

Look things up. Allowed by default.

  • mixmax.get_qa
    Get Q&A Surveys
  • mixmax.get_polls
    Get Polls
  • mixmax.get_rules
    Get all rules
  • mixmax.get_teams
    Get Teams
  • mixmax.get_yes_no
    Get Yes/No Questions
  • mixmax.get_contact
    Get contact by ID
  • mixmax.get_message
    Get Message by ID
  • mixmax.get_livefeed
    Get live feed activity data
  • mixmax.get_messages
    Get Messages
  • mixmax.get_rules_id
    Get Rule by ID
  • mixmax.get_users_me
    Get Current User
  • mixmax.list_contacts
    List Contacts
  • mixmax.list_snippets
    List Snippets
  • mixmax.list_sequences
    List Sequences
  • mixmax.query_contacts
    Query Contacts
  • mixmax.get_snippets_id
    Get Snippet by ID
+ 25 MORE

write

35

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

  • mixmax.create_rule
    Create Rule
  • mixmax.create_team
    Create Team
  • mixmax.update_team
    Update Team
  • mixmax.send_message
    Send Message Draft
  • mixmax.send_snippet
    Send Snippet as Email
  • mixmax.create_contact
    Create Contact
  • mixmax.create_message
    Create Message
  • mixmax.update_contact
    Update Contact
  • mixmax.update_message
    Update Message by ID
  • mixmax.add_team_members
    Add Team Members
  • mixmax.send_test_message
    Send Test Message
  • mixmax.add_snippet_to_tag
    Add Snippet to Tag
  • mixmax.create_rule_action
    Create Rule Action
  • mixmax.create_snippet_tag
    Create Snippet Tag
  • mixmax.update_snippet_tag
    Update Snippet Tag
  • mixmax.create_code_snippet
    Create Code Snippet
+ 19 MORE

destructive

18

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

  • mixmax.delete_rule
    Delete Rule
  • mixmax.delete_team
    Delete Team
  • mixmax.delete_contact
    Delete Contact
  • mixmax.delete_snippet
    Delete Snippet
  • mixmax.cancel_sequences
    Cancel Sequence Recipients
  • mixmax.delete_rule_action
    Delete Rule Action
  • mixmax.delete_snippet_tag
    Delete Snippet Tag
  • mixmax.delete_unsubscribe
    Delete Unsubscribe
  • mixmax.remove_team_member
    Remove Team Member
  • mixmax.delete_contact_note
    Delete Contact Note
  • mixmax.delete_contact_group
    Delete Contact Group
  • mixmax.delete_link_resolver
    Delete Link Resolver
  • mixmax.delete_sequence_folder
    Delete Sequence Folder
  • mixmax.remove_contact_from_group
    Remove Contact from Group
  • mixmax.delete_integrations_sidebars
    Delete Integrations Sidebars
  • mixmax.delete_integration_enhancement
    Delete Integration Enhancement
+ 2 MORE
03 · HOW IT WORKS

Mixmax in three steps.

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

# 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 Mixmax connects.

Users add their Mixmax 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 Mixmax 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 Mixmax from any agent.

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

More email apps.

Gmail62 actionsOutlook306 actionsSendGrid364 actionsElastic Email91 actionsResend66 actionsLettr60 actionsPostmark46 actionsMissive40 actions
ALL EMAIL APPS →
07 · FAQ

Mixmax and Arc0, answered.

Q01

Can I use Mixmax with Claude, ChatGPT or Cursor?

Yes. Connect Mixmax 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 Mixmax actions you allow.

Q02

How do users connect Mixmax?

Users add their Mixmax 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 Mixmax actions can my agent take?

94 in total: 41 read, 35 write and 18 destructive, such as “create Rule”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Mixmax?

Yes. Actions like “delete Rule” 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 Mixmax too?

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

Get started

Plug Mixmax into your agent.

Your users connect Mixmax once, under your brand. Your agent gets 94 actions behind your policies, with every call on the record.

Connect MixmaxBrowse all apps →

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