--- title: "LettrLabs integrations and MCP server - APIANT.ai" description: "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..." canonical: "https://apiant.ai/connections/lettrlabs" --- # 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 key [lettrlabs.com](https://lettrlabs.com/) **5** actions What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it. ## What do you want to automate with LettrLabs? 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)](https://apiant.ai/docs/mcp/claude-code) ### 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)](https://apiant.ai/docs/mcp) ### 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)](https://apiant.ai/docs/mcp) ### Zed Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### 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)](https://apiant.ai/docs/mcp) ### 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)](https://apiant.ai/docs/mcp) Popular ## LettrLabs with the apps people pair it with most - [ **Stripe to LettrLabs** Stripe is a payment processing platform for online businesses.](https://apiant.ai/connect/stripe-to-lettrlabs) - [ **HubSpot to LettrLabs** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-lettrlabs) - [ **Salesforce to LettrLabs** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/salesforce-to-lettrlabs) - [ **Slack to LettrLabs** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/slack-to-lettrlabs) - [ **Google Sheets to LettrLabs** Google Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.](https://apiant.ai/connect/google-sheets-to-lettrlabs) - [ **Gmail to LettrLabs** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-lettrlabs) - [ **Google Calendar to LettrLabs** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/google-calendar-to-lettrlabs) - [ **Google Drive to LettrLabs** Google Drive is a cloud storage solution for uploading, sharing, and collaborating on files across devices...](https://apiant.ai/connect/google-drive-to-lettrlabs) Pair it ## Connect LettrLabs with another app - [ **Stripe to LettrLabs**](https://apiant.ai/connect/stripe-to-lettrlabs) - [ **HubSpot to LettrLabs**](https://apiant.ai/connect/hubspot-to-lettrlabs) - [ **Salesforce to LettrLabs**](https://apiant.ai/connect/salesforce-to-lettrlabs) - [ **Slack to LettrLabs**](https://apiant.ai/connect/slack-to-lettrlabs) - [ **Google Sheets to LettrLabs**](https://apiant.ai/connect/google-sheets-to-lettrlabs) - [ **Gmail to LettrLabs**](https://apiant.ai/connect/gmail-to-lettrlabs) - [ **Google Calendar to LettrLabs**](https://apiant.ai/connect/google-calendar-to-lettrlabs) - [ **Google Drive to LettrLabs**](https://apiant.ai/connect/google-drive-to-lettrlabs) - [ **Mailchimp to LettrLabs**](https://apiant.ai/connect/mailchimp-to-lettrlabs) - [ **Shopify to LettrLabs**](https://apiant.ai/connect/shopify-to-lettrlabs) - [ **QuickBooks Online to LettrLabs**](https://apiant.ai/connect/quickbooks-online-to-lettrlabs) - [ **Pipedrive to LettrLabs**](https://apiant.ai/connect/pipedrive-to-lettrlabs) - [ **ActiveCampaign to LettrLabs**](https://apiant.ai/connect/activecampaign-to-lettrlabs) - [ **Notion to LettrLabs**](https://apiant.ai/connect/notion-to-lettrlabs) - [ **Airtable to LettrLabs**](https://apiant.ai/connect/airtable-to-lettrlabs) - [ **Trello to LettrLabs**](https://apiant.ai/connect/trello-to-lettrlabs) - [ **Asana to LettrLabs**](https://apiant.ai/connect/asana-to-lettrlabs) - [ **JIRA to LettrLabs**](https://apiant.ai/connect/jira-to-lettrlabs) - [ **ClickUp to LettrLabs**](https://apiant.ai/connect/clickup-to-lettrlabs) - [ **Zoom to LettrLabs**](https://apiant.ai/connect/zoom-to-lettrlabs) - [ **Discord to LettrLabs**](https://apiant.ai/connect/discord-to-lettrlabs) - [ **Twilio to LettrLabs**](https://apiant.ai/connect/twilio-to-lettrlabs) - [ **SendGrid to LettrLabs**](https://apiant.ai/connect/sendgrid-to-lettrlabs) - [ **Outlook to LettrLabs**](https://apiant.ai/connect/outlook-to-lettrlabs) - [ **Intercom to LettrLabs**](https://apiant.ai/connect/intercom-to-lettrlabs) - [ **Freshdesk to LettrLabs**](https://apiant.ai/connect/freshdesk-to-lettrlabs) - [ **Klaviyo to LettrLabs**](https://apiant.ai/connect/klaviyo-to-lettrlabs) - [ **Brevo to LettrLabs**](https://apiant.ai/connect/brevo-to-lettrlabs) - [ **Typeform to LettrLabs**](https://apiant.ai/connect/typeform-to-lettrlabs) - [ **JotForm to LettrLabs**](https://apiant.ai/connect/jotform-to-lettrlabs) - [ **Calendly to LettrLabs**](https://apiant.ai/connect/calendly-to-lettrlabs) - [ **PandaDoc to LettrLabs**](https://apiant.ai/connect/pandadoc-to-lettrlabs) - [ **Webflow to LettrLabs**](https://apiant.ai/connect/webflow-to-lettrlabs) - [ **Wix to LettrLabs**](https://apiant.ai/connect/wix-to-lettrlabs) - [ **Instagram to LettrLabs**](https://apiant.ai/connect/instagram-to-lettrlabs) - [ **OpenAI to LettrLabs**](https://apiant.ai/connect/openai-to-lettrlabs) - [ **OneDrive to LettrLabs**](https://apiant.ai/connect/onedrive-to-lettrlabs) - [ **Google Docs to LettrLabs**](https://apiant.ai/connect/google-docs-to-lettrlabs) - [ **Ontraport to LettrLabs**](https://apiant.ai/connect/ontraport-to-lettrlabs) - [ **Freshworks CRM to LettrLabs**](https://apiant.ai/connect/freshworks-crm-to-lettrlabs) - [ **GoHighLevel to LettrLabs**](https://apiant.ai/connect/gohighlevel-to-lettrlabs) - [ **Capsule CRM to LettrLabs**](https://apiant.ai/connect/capsule-crm-to-lettrlabs) - [ **Copper to LettrLabs**](https://apiant.ai/connect/copper-to-lettrlabs) - [ **Streak to LettrLabs**](https://apiant.ai/connect/streak-to-lettrlabs) - [ **NetHunt CRM to LettrLabs**](https://apiant.ai/connect/nethunt-crm-to-lettrlabs) - [ **MINDBODY to LettrLabs**](https://apiant.ai/connect/mindbody-to-lettrlabs) - [ **PostgreSQL to LettrLabs**](https://apiant.ai/connect/postgresql-to-lettrlabs) - [ **MySQL to LettrLabs**](https://apiant.ai/connect/mysql-to-lettrlabs) - [ **Vercel to LettrLabs**](https://apiant.ai/connect/vercel-to-lettrlabs) - [ **PagerDuty to LettrLabs**](https://apiant.ai/connect/pagerduty-to-lettrlabs) - [ **Gravity Forms to LettrLabs**](https://apiant.ai/connect/gravity-forms-to-lettrlabs) - [ **HubSpot Enterprise to LettrLabs**](https://apiant.ai/connect/hubspot-enterprise-to-lettrlabs) - [ **Google Forms to LettrLabs**](https://apiant.ai/connect/google-forms-to-lettrlabs) - [ **Facebook Lead Ads to LettrLabs**](https://apiant.ai/connect/facebook-lead-ads-to-lettrlabs) - [ **monday.com to LettrLabs**](https://apiant.ai/connect/monday-com-to-lettrlabs) - [ **Google Ads to LettrLabs**](https://apiant.ai/connect/google-ads-to-lettrlabs) - [ **Google Tasks to LettrLabs**](https://apiant.ai/connect/google-tasks-to-lettrlabs) - [ **Telegram to LettrLabs**](https://apiant.ai/connect/telegram-to-lettrlabs) - [ **MailerLite to LettrLabs**](https://apiant.ai/connect/mailerlite-to-lettrlabs) - [ **Google Contacts to LettrLabs**](https://apiant.ai/connect/google-contacts-to-lettrlabs) 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. ## Related apps - [ **ActiveCampaign to LettrLabs** ActiveCampaign is a marketing automation, email marketing, and CRM platform.](https://apiant.ai/connect/activecampaign-to-lettrlabs) - [ **Autobound** Autobound writes hyper-personalized emails with AI based on 150+ insights to boost reply rate.](https://apiant.ai/connections/autobound) - [ **AWeber to LettrLabs** AWeber provides professional email marketing software and services.](https://apiant.ai/connect/aweber-to-lettrlabs) - [ **Beamer to LettrLabs** Beamer is an easy to use newsfeed and changelog for your website or app.](https://apiant.ai/connect/beamer-to-lettrlabs) - [ **Beehiiv to LettrLabs** Beehiiv is a newsletter publishing and audience growth platform.](https://apiant.ai/connect/beehiiv-to-lettrlabs) - [ **Botdog** Botdog is a LinkedIn automation tool for sales teams of 1-20.](https://apiant.ai/connections/botdog) - [ **Brevo to LettrLabs** Brevo is the leading CRM suite designed to cultivate long-term customer relationships and help businesses...](https://apiant.ai/connect/brevo-to-lettrlabs) - [ **Campaign Monitor to LettrLabs** Campaign Monitor email marketing — manage lists, subscribers, custom fields, send smart (transactional)...](https://apiant.ai/connect/campaign-monitor-to-lettrlabs) [More in Marketing](https://apiant.ai/apps/marketing) Reviews ## What our customers say 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.