Integration
Connect Lettr and Sunwise
When New email event fires in Lettr, your agent runs Add Contact Tracking in Sunwise, or Created Project in Sunwise to Add contact in Lettr. Describe the whole flow and it is built, tested on every scenario and kept running.
What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it.
Build solutions, not workarounds.
What do you want Lettr and Sunwise to do together?
Ask the assistant
Connect your AI client
Give your AI client this address.
https://mcp.apiant.aiOne connection does both: ask your client to act in an app once, or have it build an automation that keeps running. Any client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser.
Set it up in your client
Claude Code
Run this in the directory you want to work in.
claude mcp add --transport http -s project apiant-ai https://mcp.apiant.aiStart Claude Code there, approve the server, and sign in in the browser page it opens.
Claude Code guide (opens in a new tab)Claude, web and desktop
Open Customize, then Connectors, then Add custom connector, and paste the address. On Team and Enterprise an owner adds it first.
Setup guide (opens in a new tab)Cursor
Add the address to your MCP configuration as a server URL. Cursor signs you in in your browser.
Setup guide (opens in a new tab)Zed
Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server.
Setup guide (opens in a new tab)Codex and the ChatGPT desktop app
Open Settings, then MCP servers, then Add server, and choose Streamable HTTP. From the terminal, Codex takes the address with its own add command and then signs you in.
Setup guide (opens in a new tab)Grok
Open grok.com/connectors, choose New Connector, then Custom, and paste the address. Grok signs you in in your browser.
Setup guide (opens in a new tab)Any other MCP client
Paste the address where the client asks for a remote MCP server URL, and name the server apiant-ai where it lets you. APIANT's skills reach the client over the same connection.
Setup guide (opens in a new tab)Example flows
What Lettr and Sunwise can do together
From Lettr to Sunwise
When New email event in Lettr
then Add Contact Tracking in Sunwise
From Sunwise to Lettr
Starting points drawn from the triggers and actions in the catalog today. Describe the flow you need, at any depth, and your agent builds it and tests every scenario before it ships.
Everything your agent can do with Lettr and Sunwise
Triggers and actions 4 triggers · 45 actions
- New email event
Triggers instantly when Lettr reports an email event, such as a delivery, bounce, open, click, spam complaint or unsubscribe.
- Add audience list
Creates a new audience list in Lettr with the given name and returns the created list.
- Add contact
Adds a new contact to your Lettr audience, optionally placing it on a list, setting custom properties, and sending a double opt-in confirmation email.
- Add contact to list
Adds an existing contact to one of your audience lists. Succeeds whether the contact was newly added or was already on the list.
- Add template
Creates a new email template in Lettr from HTML or Topol editor JSON content, and publishes its first version with the merge tags found in the content.
- Create campaign
Creates a draft email campaign in Lettr with its subject, sender, content and audience, ready to send or schedule.
- Create webhook
Creates a Lettr webhook that sends email delivery and engagement events to a URL.
- Delete contact
Permanently deletes a contact from your Lettr audience.
- Delete webhook
Deletes a Lettr webhook so it stops sending events.
- Get campaign
Returns one Lettr campaign with its settings, audience, status and delivery stats.
- Get contact
Returns a single audience contact, including its subscription status, custom properties, lists and topics.
- Get email
Returns a sent email's details — sender, subject, recipients, delivery state — and all of its delivery, bounce, open and click events.
- Get template
Returns a single email template by its slug, including its HTML, editor content, purpose, status and version details.
- Get webhook
Gets one Lettr webhook by ID: its name, URL, event types, whether it is enabled and its last delivery status.
- List audience lists
Returns all audience lists in your Lettr team, with each list's name and contact count.
- List campaigns
Returns the email campaigns in your Lettr account, optionally only those with a given status.
- List contacts
Returns the contacts in your Lettr audience, optionally narrowed by a search term, subscription status, list or segment.
- List domains
Returns every sending domain registered in your Lettr account, with its approval status, whether it can send, and its DNS verification state.
- List emails
Returns emails sent from your Lettr account in the last few days, optionally filtered by recipient address and date range.
- List templates
Returns the email templates in a Lettr project, optionally limited to one folder or to transactional or campaign templates.
- Schedule campaign
Schedules a Lettr campaign to send at a future time, or moves an already scheduled campaign to a new time.
- Schedule email
Schedules a transactional email for delivery at a future time (at least 5 minutes ahead and within 30 days), using your own content or a saved template.
- Send campaign
Sends a draft Lettr campaign to its audience right away. The campaign needs a subject, a sender on a verified domain, and content.
- Send Email
Sends a transactional email through Lettr to one or more recipients, using your own HTML/text content or a saved template.
- Send Email Template
Sends an email using one of your saved Lettr templates, filling its merge variables with the values you provide. Returns the send's request ID and how many recipients were accepted.
- Unschedule campaign
Cancels a scheduled Lettr campaign send and returns the campaign to draft.
- Update contact
Updates an existing contact in your Lettr audience, changing its email address, subscription status or custom properties. Fields left blank are not changed.
- Created Project
Triggers when a new project is created in Sunwise.
- New Contact
Triggers when a new contact is created in Sunwise.
- Updated Contact
Triggers when a contact is created or its details change in Sunwise.
- Add Contact Tracking
Logs a follow-up activity (call, email, visit, message) against a Sunwise contact, with an optional reminder.
- Add Proposal
Creates a new proposal inside an existing Sunwise project, optionally from a preset plan and optionally generated right away.
- Add Report
Creates a new report for a project from one of its historical records.
- Create or Update Contact
Creates a contact in Sunwise with name, email and telephone.
- Get All Proposals for a Project
Returns every proposal in a project along with its contact.
- Get Contact
Returns a single Sunwise contact by its ID, including name, email, telephone, company and status.
- Get Favorite Proposal ID
Returns the favorite proposal of a project.
- Get Project
Returns a Sunwise project by its ID, including its location, contact, agent and favorite commercial offer.
- Get Proposal
Returns the details of one proposal.
- List Contacts
Returns the contacts visible to the connected account, optionally filtered by text, agent, status or contact status.
- List Contact Trackings
Returns all tracking records (follow-ups) for a contact, most recent first, each with its comments.
- List Presets
Returns all active proposal presets (plans) for your Sunwise company.
- Search Contacts
Searches active contacts matching the given text and returns the matches.
- Search Projects
Searches active projects matching the given text and returns the matches.
- Search Project Summaries
Searches active project summaries matching the given text and returns the matches.
- Search Proposals
Searches active proposals matching the given text and returns the matches.
- Search Proposal Summaries
Searches active proposal summaries matching the given text and returns the matches.
- Search Reports
Searches active reports matching the given text and returns the matches.
- Update Contact
Updates an existing Sunwise contact's name, email, telephone and details.
No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.
Each app on its own
Reviews
What our customers say
More from Lettr
Lettr to SalesforceSalesforce is a leading enterprise customer relationship management (CRM) platform.
Lettr to SlackSlack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...
Lettr to MailchimpMailchimp marketing automation and email platform.
Lettr to StripeStripe is a payment processing platform for online businesses.
Lettr to ShopifyShopify is a commerce platform for online stores and retail point-of-sale.
Lettr to QuickBooks OnlineQuickBooks Online accounting — manage customers, invoices, bills, payments, vendors, expenses, and more via...
More into Sunwise
HubSpot to SunwiseHubSpot is your all-in-one stop for all of your marketing software needs.
Google Sheets to SunwiseGoogle Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.
Gmail to SunwiseGmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...
Google Calendar to SunwiseGoogle Calendar is a time management tool providing scheduling features, event reminders, and integration...
Questions
Lettr and Sunwise, answered
What can start an automation from Lettr?
Any of Lettr's 1 trigger in the catalog, including New email event. Describe the moment in plain language and your agent picks the right one.
What can your agent do in Sunwise when something happens in Lettr?
Any of Sunwise's 19 actions, including Create or Update Contact, Update Contact, Add Contact Tracking and Add Proposal. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Sunwise to Lettr?
Yes. When something happens in Sunwise, your agent can act in Lettr too. This page covers both directions: Sunwise's triggers and Lettr's actions are listed here as well.
Do I have to build a connector for Lettr or Sunwise?
No. Both are in the catalog with their triggers and actions. You describe the automation; your agent builds it, tests every scenario and keeps it running.
Can my AI client use Lettr and Sunwise without building an automation?
Yes. With your AI client connected to APIANT, ask it to do something in either app once and it runs that action on the spot. Ask for an automation and your agent builds it, tests every scenario and keeps it running. One connection covers both.
What happens when something fails?
Your agent works that out for you. It plans the failure paths along with the happy path, then tests every scenario before it ships.
Is there a free plan?
Yes. Every plan includes the agent, including free, and building from your own AI client spends no assistant credits.