Posylai MCP — AI Email Builder
Build production-ready HTML email campaigns from any brand website.
Posylai MCP lets Claude, Cursor, Codex and other MCP-compatible agents analyze a brand website, build an email design system from it, assemble responsive campaigns, QA the rendering and export production HTML.
Remote MCP endpoint
https://mcp.posylai.ru/mcp
Transport: streamable HTTP. Authentication: personal bearer token.
What it does
Most email tooling starts from a blank template. Posylai starts from the brand's own website: it reads the real markup — typography, palette, spacing rhythm, button shapes, image treatment — and turns it into a reusable master template. Campaigns are then assembled from that template's blocks, so every email looks like the brand instead of like a generic newsletter.
The rendered result is checked before it is handed back: mobile column, alt texts, unsubscribe link, message weight, appearance across mail clients.
Typical timings on our pipeline: ~15 minutes to build a master template from a site, ~10 minutes per campaign after that.
Getting a token
- Register at https://posylai.ru/login.html#reg — the password is emailed to you.
- Sign in to https://posylai.ru/account/.
- Issue an MCP token there.
Tokens are per user, not per server: the endpoint answers nothing without a valid one, and revoking a token in the dashboard takes effect immediately without affecting anyone else.
The first template is free.
Client configuration
Claude Code
claude mcp add --transport http posylai https://mcp.posylai.ru/mcp \
--header "Authorization: Bearer YOUR_TOKEN"
Claude Desktop, Cursor, VS Code, Codex, Windsurf
{
"mcpServers": {
"posylai": {
"type": "http",
"url": "https://mcp.posylai.ru/mcp",
"headers": {
"Authorization": "Bearer YOUR_TOKEN"
}
}
}
}
Per-client file locations are in examples/.
Any client that speaks streamable HTTP MCP with a bearer header will work; there is nothing client-specific in the server.
Typical flow
Status tools report progress, so an agent never has to wait blind.
Tools — 29 total
Brand and style (9)
unified_brands · unified_design_system · unified_brand_questionnaire ·
unified_brand_design_code · unified_brand_sketch ·
unified_brand_sketch_status · unified_brand_sketch_edit ·
unified_brand_brief_submit · unified_brand_create
Campaign build (6)
unified_masters · unified_plan_start · unified_job_status ·
unified_apply_dc · unified_render · unified_rerender
Quality checks (4)
unified_qa_report · unified_qa_run · unified_gate · unified_section_images
Edits (9)
unified_slot_set · unified_section_get · unified_section_put ·
unified_section_update · unified_fix_finding · unified_section_disable ·
unified_upload_asset · unified_dc_get · unified_dc_put
Export (1)
unified_export
What it does not do
Worth stating plainly so an agent does not plan around it:
- It does not send campaigns to a list. It returns HTML; sending happens through your ESP — Unisender, Sendsay, Mindbox, Mailganer or any other.
- It does not store subscribers and does not segment them.
- It does not invent a visual identity. The style is taken from the brand's site or brand book, not made up.
Discovery
Machine-readable manifest, open without a token:
https://mcp.posylai.ru/.well-known/mcp.json
Human documentation: https://posylai.ru/mcp/
Support
По-русски
Posylai MCP даёт ИИ-агентам 29 инструментов для сборки email-писем по адресу сайта бренда: снять фирменный стиль, собрать мастер-шаблон, сформировать письмо по заданию, проверить вёрстку и забрать готовый HTML.
Адрес сервера — https://mcp.posylai.ru/mcp, транспорт streamable HTTP,
авторизация личным токеном. Токен выпускается в
личном кабинете после
регистрации; первый шаблон бесплатный.
Токен привязан к учётной записи: без действующего токена сервер не отвечает. Отозвать его можно в кабинете, старый перестаёт работать сразу.
Сервер не рассылает письма по базе и не хранит подписчиков — он отдаёт готовый HTML, а отправка идёт через ваш сервис рассылок. Подробная документация на русском: https://posylai.ru/mcp/
License
MIT — see LICENSE.
This repository contains the public manifest, documentation and client configuration examples. The server itself is a hosted service.
