Gmail

curl -X POST "https://api.sb/leaseline.app/contacts/enroll?mode=try" \
  -H "Authorization: Bearer $SB_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"contact":"contacts/rosa-northgate","sequence":"sequences/first-touch","from":"dana@tryleaseline.app"}'

npx startup-builder do Contact.enroll --try --data '{"contact":"contacts/rosa-northgate","sequence":"sequences/first-touch","from":"dana@tryleaseline.app"}'

{
  "name": "do",
  "arguments": {
    "mode": "try",
    "code": "return await $.Contact.enroll({ contact: 'contacts/rosa-northgate', sequence: 'sequences/first-touch', from: 'dana@tryleaseline.app' })"
  }
}

import { $ } from 'startup-builder'

const result = await $.try.Contact.enroll({ contact: 'contacts/rosa-northgate', sequence: 'sequences/first-touch', from: 'dana@tryleaseline.app' })

 1{
 2  "$type": "Message",
 3  "mode": "try",
 4  "stored": false,
 5  "from": "Dana Okafor <dana@tryleaseline.app>",
 6  "to": "rosa@northgate-rentals.com",
 7  "subject": "The rent spreadsheet at Northgate",
 8  "body": "Saw you are hiring a leasing coordinator. Is the rent spreadsheet part of the job?",
 9  "sendAt": "2026-10-28T14:10:00Z",
10  "mailbox": {
11    "warmedDays": 14,
12    "perDay": 30,
13    "sentToday": 11
14  },
15  "headers": {
16    "List-Unsubscribe": "present",
17    "List-Unsubscribe-Post": "List-Unsubscribe=One-Click"
18  }
19}

Connect onceCopy Anchor Link

1. Call Integration.connect with system: 'mailboxes' and venue: 'gmail', then open the connectUrl it returns and sign in as the Google account you send from.
2. Approve the two grants Google lists: send as you, and read the threads your agents start.
3. Authenticate the sending Domain once with Domain.authenticate, which writes SPF, DKIM and DMARC and checks them before the first send.

What your agents doCopy Anchor Link

Calls on your own account are free.

What it holdsCopy Anchor Link

Events and webhooksCopy Anchor Link

Any Event can wake a Workflow, and a Watch delivers it to your endpoint, signed (Events and webhooks).

LimitsCopy Anchor Link

Field mapCopy Anchor Link

What try does hereCopy Anchor Link

Renders the exact email, headers included, and returns it with the time it would send; nothing reaches Gmail and no draft is saved.

How long a connection lastsCopy Anchor Link

A connection lasts until you revoke it in your Google Account, or until you change your Google password, which ends any grant that holds Gmail access.

The platform asks you to reconnect 7 days before it runs out; until you do, a call that needs it refuses with needs-reauth.

Plays and strategiesCopy Anchor Link

Used byCopy Anchor Link

• Agent tasks: Launch day · Link pitches · Save and win back · Answer every inbound · Personal first touch
• Services: Booked first calls · Demand generation

ReferenceCopy Anchor Link

6 calls, each with its path and price

Call	Path	Price
Contact.enroll	POST /contacts/enroll	Free
Message.schedule	POST /messages/schedule	Free
Message.broadcast	POST /messages/broadcast	Free
Conversation.answer	POST /conversations/answer	Free
Prospect.engage	POST /prospects/engage	Free
Contact.unsubscribe	POST /contacts/unsubscribe	Free