Your AI agent works in Letteros on its own

What the agent does over MCP

• Emails

  Builds an email from brand modules, edits blocks, checks the code, orders Outlook, Gmail and Apple Mail screenshots, sends a test and exports HTML.

• Decks

  Builds a deck from an outline, adds and reorders slides, changes text and style, exports PDF and shares a presentation link.

• Websites

  Builds a landing page from sections or a Figma mockup, adds a lead form that can send to Bitrix24 or amoCRM, publishes the site and shows the leads.

• Campaigns and flows

  Turns an email into a campaign, picks contacts and transport, runs a test and the send, pauses it and reports back.

• Brand and media

  Reads and saves the project brand: logo, colours, fonts. Uploads images and analyses email sources.

• Analytics

  Turns on email analytics and reads the report, shows token spend and screenshot prices.

How to connect

1. 1

   Sign up

   Signing up through Telegram takes a couple of minutes. MCP comes with every plan.

2. 2

   Add Letteros to your agent

   In ChatGPT or Claude it is a connector with the server address. In Claude Code and Cursor it is a personal key from the workspace settings.

3. 3

   Describe the task

   The agent works in the project selected in the workspace and uses its brand: logo, colours, fonts and modules.

Server address

https://3.letteros.com/mcp

claude mcp add --transport http letteros https://3.letteros.com/mcp \
  --header "Authorization: Bearer <ключ>"

Where to start

Requests the agent completes end to end, from draft to check.

• Sale email

  Build a Black Friday email in Letteros for our brand: a banner, three products, promo code BLACK20. Check it in Outlook and send a test to my inbox.

• Landing page from a mockup

  Build a site from this Figma mockup, add a lead form and publish it.

• Campaign to a list

  Make a campaign from yesterday’s email for the Subscribers list, run a test, and if it looks right, send it to everyone.

MCP questions

What is MCP?

MCP (Model Context Protocol) is an open protocol that lets an AI agent connect to external services and work with them on its own. Letteros gives the agent tools for emails, decks, websites and campaigns.

Which agents can I connect?

Any agent that speaks MCP over HTTP: ChatGPT and Claude connect through the Letteros sign-in, Claude Code and Cursor with a personal key. You can disconnect an agent at any time in the workspace settings.

How much does MCP cost?

MCP comes with every plan. The model runs on your own Claude or ChatGPT subscription, and actions in Letteros cost the same as in the editor: an email is 100 tokens on its first test or export, decks and docs are free.

Will the agent send a campaign without me?

No. A send to your base and deleting a site only happen after you confirm. The agent can send a test on its own.