Integration
Connect Hiver and Lettr
When New Inbound Conversation fires in Hiver, your agent runs Add contact in Lettr, or New email event in Lettr to Find Inbox User by Email in Hiver. 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 Hiver and Lettr 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 Hiver and Lettr can do together
From Hiver to Lettr
When New Inbound Conversation in Hiver
then Add contact in Lettr
From Lettr to Hiver
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 Hiver and Lettr
Triggers and actions 2 triggers · 34 actions
- New Inbound Conversation
Triggers when a new conversation appears in a shared inbox.
- Create Note
Adds an internal note to a conversation, optionally as a reply to another note.
- Create Shared Draft
Creates a shared reply draft on a conversation that inbox members can review and send.
- Create Tag
Creates a tag in a shared inbox, with an optional color and description.
- Find Inbox User by Email
Finds a user in a shared inbox by exact email address.
- Find Tag by Name
Finds tags in a shared inbox by name.
- Get Conversation
Returns one conversation in a shared inbox, with its status, assignee, tags, permalinks and message IDs.
- Get Inbox
Returns one shared inbox by its ID, including its name, email address and whether Hiver still has mailbox access.
- List Conversations
Returns the conversations in a shared inbox, newest first, with status, assignee, tags and permalinks.
- List Inboxes
Returns the shared inboxes in your Hiver account, with each inbox's ID, name and email address.
- List Inbox Tags
Returns the tags defined in a shared inbox.
- List Inbox Users
Returns the users who belong to a shared inbox, with their names, emails and phone numbers.
- 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.
- Delete contact
Permanently deletes a contact from your Lettr audience.
- 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.
- 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.
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
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Questions
Hiver and Lettr, answered
What can start an automation from Hiver?
Any of Hiver's 1 trigger in the catalog, including New Inbound Conversation. Describe the moment in plain language and your agent picks the right one.
What can your agent do in Lettr when something happens in Hiver?
Any of Lettr's 23 actions, including Create campaign, Send campaign, Send Email and Send Email Template. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Lettr to Hiver?
Yes. When something happens in Lettr, your agent can act in Hiver too. This page covers both directions: Lettr's triggers and Hiver's actions are listed here as well.
Do I have to build a connector for Hiver or Lettr?
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 Hiver and Lettr 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.