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Etermin for AI agents

eTermin is an online appointment scheduling platform that lets businesses manage bookings, staff availability, and calendars, used by service businesses coordinating customer appointments. 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 EterminSee the 78 actions ↓
SchedulingAPI keyMCP + RESTetermin.net
AUDIT LOG · ETERMINPOLICY: acme-support
09:41:07 · claude · u_8f2read
etermin.list_vouchers
List Vouchers✓ allowed · 212ms
09:41:08 · claude · u_8f2read
etermin.get_users
Get Users✓ allowed · 164ms
09:41:09 · claude · u_8f2write
etermin.create_user
Create User✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
etermin.delete_user
Delete User✕ blocked · policy: deny
EVERY ETERMIN CALL, ON THE RECORD
01 · USE CASES

What agents do in Etermin.

01

Book a new appointment

Create an appointment for a customer once they choose a service and available time slot.

02

Check a calendar's working times

Get a calendar's working times to find open slots before offering them to a customer.

03

Confirm before deleting an appointment

Require approval before deleting an appointment, since it cancels a booking a customer is expecting.

02 · ACTIONS

78 Etermin actions, graded by risk.

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

read

27

Look things up. Allowed by default.

  • etermin.get_users
    Get Users
  • etermin.get_rating
    Get Customer Ratings
  • etermin.get_company
    Get Company
  • etermin.get_absences
    Get Absences
  • etermin.get_contacts
    Get Contacts
  • etermin.get_services
    Get Services
  • etermin.get_calendars
    Get Calendars
  • etermin.get_timeslots
    Get Timeslots
  • etermin.list_vouchers
    List Vouchers
  • etermin.list_webhooks
    List Webhooks
  • etermin.get_anchortimes
    Get Anchortimes
  • etermin.get_usermapping
    Get Usermapping
  • etermin.get_message_logs
    Get Message Logs
  • etermin.get_servicegroup
    Get Service Group
  • etermin.get_contact_by_id
    Get Contact By ID
  • etermin.get_service_by_id
    Get Service By ID
+ 11 MORE

write

33

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

  • etermin.create_user
    Create User
  • etermin.create_absence
    Create Absence
  • etermin.create_contact
    Create Contact
  • etermin.create_service
    Create Service
  • etermin.create_voucher
    Create Voucher
  • etermin.create_webhook
    Create Webhook
  • etermin.update_absence
    Update Absence
  • etermin.update_contact
    Update Contact
  • etermin.update_service
    Update Service
  • etermin.update_voucher
    Update Voucher
  • etermin.update_webhook
    Update Webhook
  • etermin.update_calendar
    Update Calendar
  • etermin.update_resource
    Update Resource
  • etermin.create_anchortime
    Create Anchortime
  • etermin.update_anchortime
    Update Anchortime
  • etermin.create_appointment
    Create Appointment
+ 17 MORE

destructive

18

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

  • etermin.delete_user
    Delete User
  • etermin.delete_absence
    Delete Absence
  • etermin.delete_contact
    Delete Contact
  • etermin.delete_service
    Delete Service
  • etermin.delete_voucher
    Delete Voucher
  • etermin.delete_webhook
    Delete Webhook
  • etermin.delete_calendar
    Delete Calendar
  • etermin.delete_resource
    Delete Resource
  • etermin.delete_anchortime
    Delete Anchortime
  • etermin.delete_appointment
    Delete Appointment
  • etermin.delete_usermapping
    Delete Usermapping
  • etermin.delete_servicegroup
    Delete Service Group
  • etermin.delete_working_times
    Delete Working Times
  • etermin.delete_appointment_sync
    Delete Appointment via Sync
  • etermin.delete_calendar_service
    Delete Calendar Service
  • etermin.delete_anchortime_by_date
    Delete Anchortime By Date
+ 2 MORE
03 · HOW IT WORKS

Etermin in three steps.

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

# 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 Etermin connects.

Users add their Etermin 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 Etermin 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 Etermin from any agent.

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

More scheduling apps.

Google Calendar50 actionsCalendly57 actionsApaleo29 actionsCal175 actionsBookingmood142 actionsEventbrite95 actionsTicket Tailor77 actionsBooqable49 actions
ALL SCHEDULING APPS →
07 · FAQ

Etermin and Arc0, answered.

Q01

Can I use Etermin with Claude, ChatGPT or Cursor?

Yes. Connect Etermin 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 Etermin actions you allow.

Q02

How do users connect Etermin?

Users add their Etermin 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 Etermin actions can my agent take?

78 in total: 27 read, 33 write and 18 destructive, such as “create User”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Etermin?

Yes. Actions like “delete User” 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 Etermin too?

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

Get started

Plug Etermin into your agent.

Your users connect Etermin once, under your brand. Your agent gets 78 actions behind your policies, with every call on the record.

Connect EterminBrowse all apps →

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