Lettr for your voice agent

Lettr is an email and messaging platform for transactional delivery, templates, audiences, campaigns, domains, and webhooks. Use it to send reliable product emails and manage customer messaging from one place.

Get startedAll integrations

Call 1800 570 693 to talk to the demo agent. Plans start at A$49 a month.

The app's Connected apps page: what agents do with each app, such as booking appointments, knowing who is calling and sending emails, and whether each one is working.The app's Connected apps page: what agents do with each app, such as booking appointments, knowing who is calling and sending emails, and whether each one is working.The app's Connected apps page: what agents do with each app, such as booking appointments, knowing who is calling and sending emails, and whether each one is working.The app's Connected apps page: what agents do with each app, such as booking appointments, knowing who is calling and sending emails, and whether each one is working.

Integration record

Status
Available
Plan
Every plan, from Starter at A$49 a month
How it connects
With an API key. You create a key in Lettr and paste it on a secure page in Connected apps.
What it reads
26 actions, such as get Audience Contact, get Audience List and get Audience Property.
What it changes
34 actions, such as attach Contacts to Lists, bulk Create Audience Contacts and create Audience Contact.
What starts an action
The agent runs an action during a call or chat when the conversation needs it. It only runs the actions you switch on.
Custom work
You choose each action from its list of 60. Anything the list doesn't cover needs a custom API tool on Scale, or a Concierge build.
Checked
Action list checked 14 November 2026. We haven't tested each action.

Lettr actions

Reads 26

  • Get Audience Contact
  • Get Audience List
  • Get Audience Property
  • Get Audience Segment
  • Get Audience Topic
  • Get Campaign
  • Get Domain
  • Get Email
  • Get Scheduled Email
  • Get Template
  • Get Template Merge Tags
  • Get Webhook
  • List Audience Contacts
  • List Audience Lists
  • List Audience Properties
  • List Audience Segments
  • List Audience Topics
  • List Campaign Events
  • List Campaigns
  • List Domains
  • List Email Events
  • List Sent Emails
  • List Projects
  • List Templates
2 more
  • List Webhooks
  • Verify Domain

Changes 24

  • Attach Contacts to Lists
  • Bulk Create Audience Contacts
  • Create Audience Contact
  • Create Audience Contact With Double Opt-In
  • Create Audience List
  • Create Audience Property
  • Create Audience Segment
  • Create Audience Topic
  • Create Domain
  • Create Template
  • Create Webhook
  • Publish Template Version
  • Schedule Campaign
  • Schedule Email
  • Send Campaign
  • Send Email
  • Unschedule Campaign
  • Update Audience Contact
  • Update Audience List
  • Update Audience Property
  • Update Audience Segment
  • Update Audience Topic
  • Update Template
  • Update Webhook

Deletes 10

  • Cancel Scheduled Email
  • Delete Audience Contact
  • Delete Audience Lists
  • Delete Audience Property
  • Delete Audience Segment
  • Delete Audience Topic
  • Delete Domain
  • Delete Template
  • Delete Webhook
  • Detach Contacts from Lists

Lettr setup

  1. Pasting a Lettr API key

    Create an API key in Lettr, choose Lettr in Connected apps and paste the key on the secure page.

  2. Choosing the actions

    Choose which of the 60 actions the agent may use. Start with lookups and add the ones that change Lettr when you're ready.

  3. Testing, then publishing

    Watch the agent use the live app in the browser tester, then publish. Voice and text agents share the connection.

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