Marketing

LettrLabs integrations

Connect LettrLabs to any other app, or use it from your AI client over MCP. LettrLabs enables you to create handwritten, personalized direct mail to unleash your marketing ROI.

Connects with an API keylettrlabs.com
5 actions

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 to automate with LettrLabs?

Ask the assistant

You'll sign in before anything runs. What you typed comes with you.

Connect your AI client

Give your AI client this address.

https://mcp.apiant.ai

One 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.ai

Start 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)
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)

Popular

LettrLabs with the apps people pair it with most

Pair it

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What your agent can do with LettrLabs

Triggers and actions 5 actions

  • Action
    Add Address Book Entry

    Add an entry to the account's address book.

  • Action
    Delete Conversion

    Delete a recorded conversion by id.

  • Action
    Get Conversion

    Fetch the status of a single conversion by id.

  • Action
    List Conversions

    Returns all conversions recorded for this LettrLabs account, each with its processing status.

  • Action
    Send Purchase Event

    Records a purchase or lead with LettrLabs so it can be matched back to the mail you sent, and returns how LettrLabs parsed and typed it.

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Questions

LettrLabs, answered

Is there a LettrLabs MCP server?

APIANT's MCP server at https://mcp.apiant.ai works with LettrLabs. Add that address to any AI client that takes a remote MCP server and sign in once in your browser. Your client can then run LettrLabs actions on demand, or have APIANT build, test and run automations that use LettrLabs. Nothing to install.

What can your agent do in LettrLabs?

Any of LettrLabs's 5 actions, including Send Purchase Event, Add Address Book Entry, Get Conversion and List Conversions. Your agent maps the data both ways and tests every scenario before it ships.

Can I use LettrLabs directly from Claude, ChatGPT or Cursor?

Yes. Connect your AI client to APIANT once and it works with LettrLabs two ways. Ask it to do something in LettrLabs 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 on its own. A one-off action uses your plan's tasks the same way an automation step does.

Do I need to write code against the LettrLabs API?

No. APIANT connects to the LettrLabs API for you, with your LettrLabs API key. Describe what you want in plain language and your agent builds it on the LettrLabs triggers and actions in the catalog. If you need an endpoint that is not there yet, your agent reads the LettrLabs API documentation and adds it.

Which apps can LettrLabs connect to?

Any app in the catalog; the list on this page pairs LettrLabs with each of them. If the other app is missing, point your agent at its API documentation and it builds the connector.

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.