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

Unplain

by Dolko42version 1.0.1i★ –iRuns in the cloud
Registry nameio.unplain/unplain

Install

Overview

Description from the maker (original English)

Your assistant writes the ebook or report; Unplain designs it and returns a publish-ready PDF.

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: Docs, sheets & office work
  • You need to fill in: Authorization

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.
  • You fill in yourself: Authorization

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Which app do you use?

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

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Run this in your terminal

claude mcp add --transport http unplain https://app.unplain.io/api/mcp --header 'Authorization: your-value'

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "unplain": {
      "url": "https://app.unplain.io/api/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

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": {
    "unplain": {
      "type": "http",
      "url": "https://app.unplain.io/api/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

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.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

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

Values you fill in

  • Authorization secret required HTTP header
    Your Unplain API key, as 'Bearer unp_...'. Create one at https://app.unplain.io/account under API keys. A bare key without the 'Bearer ' prefix is also accepted.

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 6, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified against the domain unplain.io (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 Docs, sheets & office worki

  • More stars than 0% of the other 2169 servers in this category
  • Published to the registry more recently than 29% of the other 2169 servers in this category
  • Basic checks equal to or better than 100% of the other 2169 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 Unplain 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?

You need to fill in: Authorization

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 (1.0.1) reached the registry 3 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: Agent-Native Calendar, Excel MCP Server, MCP Server for Excel

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

Agent-Native Google Calendar - manage events, sync, and public booking

Runs in the cloud★ 7,620MITUpdated 2 months ago
Install

Excel MCP Server

by haris-musa

Lets AI create and edit Excel files itself, including formulas, charts and PivotTables, without Excel installed.

Runs on your computer★ 4,276MITUpdated 5 days ago
Install

Excel automation for AI - Sheets, Power Query, DAX, VBA, Tables, Ranges and more. Windows only.

Runs on your computer★ 847MITUpdated 3 days ago
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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.

Unplain MCP

Your assistant writes the ebook or report. Unplain designs it and hands back a publish-ready PDF.

Unplain is a hosted Model Context Protocol server. Ask for a document and your assistant writes it, picks a design (or applies a brand you have saved), generates a cover, and exports a finished PDF with a composed cover, a table of contents built from the headings, real pagination and a closing call-to-action page. You never leave the chat, and you never open a design tool.

Two things follow from that, and they are the reason to use this rather than asking a model for a PDF directly:

  • It comes out the same every time. Brand Themes are stored, so the tenth document matches the first. Your assistant can create one and reuse it.
  • Revisions cost no tokens. Every document is a real project in your Unplain account, and the tools return an editor link. Fix a sentence by clicking it, not by asking the model to regenerate the file.

Unplain does not write your content, and through MCP it does not take file uploads: your assistant supplies the words as Markdown. Uploading a .docx or a .txt is a web app feature, not an MCP one.

  • Endpoint: https://app.unplain.io/api/mcp
  • Transport: Streamable HTTP
  • Auth: Authorization: Bearer (a bare Authorization: is also accepted)
  • Install: nothing to install
  • Docs: https://unplain.io/mcp
  • Pricing: included on every plan, free and Pro. https://unplain.io/pricing

This repository is documentation. The server is hosted, so there is no package

to install and no source to run. Issues and questions are welcome here.

Publishing to the official MCP Registry: see PUBLISHING.md.

The manifest is server.json.


Quick start

1. Get an API key

Create one at account settings. It is shown once. A free account works for everything below.

2. Add the server

Claude Code

claude mcp add --transport http unplain https://app.unplain.io/api/mcp \

--header "Authorization: Bearer unp_your_key_here"

Full guide: https://unplain.io/mcp/claude-code

Codex

export UNPLAIN_API_KEY="unp_your_key_here"

codex mcp add unplain \ --url https://app.unplain.io/api/mcp \ --bearer-token-env-var UNPLAIN_API_KEY

Full guide: https://unplain.io/mcp/codex

Anything else

Any client that can add a remote MCP server and send an Authorization header works. You need two values:

Server URL:  https://app.unplain.io/api/mcp

Header: Authorization: Bearer unp_your_key_here

A client that only supports servers running on your own machine cannot connect yet.

3. Say hello
List the Brand Themes in my Unplain account and tell me which one is the default.

An empty list is still a success: the connection is live, you have not saved a theme yet.

4. Make something
Write a short ebook called "The Email Welcome Sequence Playbook" with an intro

and five chapters. Use my default Brand Theme, then export the PDF.


Tools

Twelve tools. Names and behaviour are current as of the version in CHANGELOG.md.

ToolWhat it does
get_accountReport the plan this key belongs to and the limits that apply. Worth calling before writing anything long.
get_design_optionsThe font catalog, the built-in presets, and the allowed range of each typography and spacing setting.
list_brand_themesList saved Brand Themes.
create_brand_themeSave a new Brand Theme: colors, fonts, links.
update_brand_themeChange a theme's name, colors, fonts or links.
create_ebookCreate a project from a title and Markdown.
list_ebooksFind the caller's projects.
get_ebookRead a project back as a structured outline.
update_ebookRewrite paragraphs, headings and lists, change cover copy and style, apply a theme, or replace the body.
generate_cover_imageAI cover artwork, drawn from the section headings or from your direction.
export_ebookRender the designed PDF.
get_export_statusPoll a running export and get the download link.
Notes that matter in practice
  • Edits are atomic and version-checked. An assistant cannot overwrite a change you made in the web app in the meantime; a stale write is rejected rather than applied over your work.
  • Design can be described rather than specified. "A stark monochrome report" or "an elegant independent literary journal" resolves to real settings, chosen from what Unplain actually supports rather than guessed.
  • Fonts outside the catalog are refused, not substituted. What you see in the app is what lands in the PDF.
  • Cover generation uses your existing allowance, the same one the button in the app draws on. There is no separate MCP allowance. Overwriting an existing cover needs an explicit go-ahead, so a repeated request cannot silently spend a second generation.
  • Download links are signed and expire. The project is saved, so export again rather than hoarding the URL.

Plans and limits

The MCP is an interface, not a tier. A key carries exactly the capabilities of the account behind it, and the same limits apply whether you work in the web app or through an assistant.

FreePro
Content pages per exported PDF5Unlimited
Saved projects5Unlimited
Brand Themes125
AI covers1 lifetime30 per period
"Made with Unplain" badgeAlwaysRemovable

Cover, contents and call-to-action pages never count toward the page limit. Current pricing: https://unplain.io/pricing


Example prompts

See examples/prompts.md for a fuller set. A few to start:

Take the Markdown in notes.md and create an Unplain ebook called "Q3 Growth

Report". Use my default Brand Theme, then wait for the export and give me the PDF link.

Open my Unplain ebook "Q3 Growth Report", read the outline, rewrite the introduction so it opens with a concrete number instead of a general claim, then export a fresh PDF.

Analyse the churn data in ./data, write it up as a report with an executive summary, three findings and a recommendation, then create it in Unplain using my "Acme" theme and export the PDF.


Keeping your key safe

Treat it like a password.

  • Codex reads it from an environment variable, which keeps it out of config files.
  • Claude Code's -s project writes a .mcp.json in the project root. Do not commit a real key in it. Use a placeholder and have each person supply their own; a key acts in the account it belongs to.
  • Revoke from account settings. Revocation takes effect immediately. Keep one key per client so you can revoke one without disturbing the rest.

Troubleshooting

SymptomCause
Every tool call failsThe key is not reaching the server. The header must be Bearer (with the space) then the key, and the URL must end in /api/mcp with no trailing slash. A bad key returns 401, which most clients report as a failed connection.
Tools do not appearRestart the client. New servers are picked up at session start.
Codex cannot find the keyIt reads the environment at launch. Export it in your shell profile and start Codex from a shell that has it.
"No Brand Themes"The connection works, you have not saved one. Your assistant can create one, or design from the built-in presets.
Export says the ebook is too longFree exports up to 5 content pages. Shorten it or upgrade. The project is saved either way.
Too many requestsPer-account rate limits on creates and exports. Wait a minute.

More: https://unplain.io/mcp


Support

License

Documentation and examples in this repository are MIT licensed. The Unplain service itself is governed by its terms and privacy policy.

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