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PopNx MCPMCP servers for people who use AI · explained in plain words

Posylai — AI Email Builder

by crmloveversion 1.0.0i★ –iRuns in the cloud
Registry nameru.posylai/email

Install

Overview

Description from the maker (original English)

Build responsive HTML email campaigns from any brand website: design, QA, export.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

  • Connection: Runs in the cloud
  • Transport: Streamable HTTP
  • Category: Chat & email

Install

Pick the AI app you use, then copy the settings.

Before you install

  • Basic checks: 1 of 1 passed
  • Runs on the maker’s server: what you ask it goes through their server.
  • The registry lists no key to fill in.

You need

Which app do you use?

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

  1. Open Settings → Connectors
  2. Press Add custom connector
  3. Paste the address below and press Add
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Add2https://…3
https://mcp.posylai.ru/mcp

Run this in your terminal

claude mcp add --transport http email https://mcp.posylai.ru/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "email": {
      "url": "https://mcp.posylai.ru/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "email": {
      "type": "http",
      "url": "https://mcp.posylai.ru/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

  1. Open ChatGPT on the web → Settings → Connectors (Apps)
  2. Press Create or Add (some plans need Developer mode under Advanced first)
  3. Paste the address below, give it a name and save
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Create2https://…3
https://mcp.posylai.ru/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified against the domain posylai.ru (the registry checks domain ownership)

  • … Not checked yet

    Still maintained

    We have not read this repo from GitHub yet

  • … Not checked yet

    Has a licence

    We have not read this repo from GitHub yet

  • … Not checked yet

    Endpoint responds

    Not checked yet; we check endpoints in rotation

  • … Not checked yet

    Sign-in with OAuth

    Not checked yet; we check endpoints in rotation

  • … Not checked yet

    No hidden instructions in tool descriptions

    Not checked yet; we read the tool list when we check the endpoint

Compared with others in Chat & emaili

  • More stars than 0% of the other 1843 servers in this category
  • Published to the registry more recently than 31% of the other 1843 servers in this category
  • Basic checks equal to or better than 100% of the other 1843 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Posylai — AI Email Builder safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 2 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Vexa, emailmd, MCP WhatsApp Cloud

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Vexa

by Vexa-ai

Meeting bot and transcripts for Google Meet, Teams and Zoom. Live or after, speakers labelled.

Runs in the cloud★ 2,949Apache-2.0Updated 2 months ago
Install

emailmd

by anypost

Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.

Computer or cloud★ 1,385MITUpdated 32 days ago
Install

MCP server for WhatsApp Cloud API (Meta) — messages, media, and templates via Graph API

Runs on your computer★ 277MITUpdated 5 months ago
Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

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

  1. Register at https://posylai.ru/login.html#reg — the password is emailed to you.
  2. Sign in to https://posylai.ru/account/.
  3. 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

StepToolWhat happens
1unified_brandsList brands already set up
2unified_brand_design_codeExtract the visual language from a website
3unified_brand_sketchDraft a master template prototype
4unified_brand_createCreate the brand from the prototype
5unified_plan_startAssemble a campaign from a brief
6unified_job_statusPoll until it is ready
7unified_renderRender the email to images
8unified_gatePre-send checks
9unified_exportTake the production HTML

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.

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