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

CEM

by cemresearchproject.orgversion 0.1.0i★ –iRuns in the cloud
Registry nameorg.cemresearchproject/cem

Install

Overview

Description from the maker (original English)

CEM's published research on building with AI: definitions, papers, calculators and the CEM Score.

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: Search & AI memory

Install

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

Before you install

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.cemresearchproject.org/mcp

Run this in your terminal

claude mcp add --transport http cem https://mcp.cemresearchproject.org/mcp

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "cem": {
      "url": "https://mcp.cemresearchproject.org/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": {
    "cem": {
      "type": "http",
      "url": "https://mcp.cemresearchproject.org/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.cemresearchproject.org/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

Tool names and descriptions exactly as the server reported them on Nov 8, 2026. The maker wrote them, not us; we show them as plain text.

  • ui_list

    The CEM UI kit (cem-ui registry/): tokens, brand assets, layout primitives, utilities, engines, frames, templates, components (one per job) and the old partials. Without a kind, the count of each kind and their ids; with one, every entry of that kind. Kinds: token, asset, primiti

  • ui_search

    Find UI kit entries (cem-ui registry/) whose id, name or any recorded field holds every word of the query. Returns the best matches, id first.

  • ui_get

    One UI kit entry in full, as cem-ui registry/ records it: by id ("site-header", "shell", "spacing", "CRP:ask-cem-panel"), component tag ("x-site-header") or name.

  • ui_laws

    The CEM design laws, cem-ui LAWS.md, the one rules document. Without a law, the whole file. With a number (1 to 20), that law as written. With words ("accent edge", "white"), every law that holds all of them.

  • ui_check

    Run cem-ui's laws check (scripts/laws.mjs, `npm run laws`) and return its table: each law's check, the count now, and the baseline it may not rise above. It checks cem-ui's own css/ and templates/; it takes no other repo. With a check name, every finding for that check (laws.mjs

  • calculators_list

    The 21 CEM calculators, the same on every site (cem-ui registry/tools.json), with what each measures, and its page and formula code from CRP's search index when CRP is up.

  • calculator_get

    One calculator: what it measures (cem-ui registry/tools.json), its inputs with their defaults, and its formula as the calculator's own code computes it (templates/tool-calcs/{slug}.blade.php: the recalc function, the helpers it calls and its constants), and the citation it gives.

  • cem_score

    Score answers to the CEM Score self-assessment (24 questions, 12 dimensions) by the calculator's own rules (cem-ui templates/tool-calcs/cem-score.blade.php: getDimGrade, updateScores). Without answers, the 24 questions with each answer's score. Answers are keyed by question (d1q1

  • research_search

    Find CEM research by words or code in CRP's public search index (GET /search/index.json): papers, playbooks, case studies, book chapters, figures, calculators and pages. Every word must match the title, full title, summary or code. Returns each result's code, title, kind and addr

  • reviews_search

    Find CEM's reviews of software tools (reviews.cemresearchproject.org): tool reviews, product pages with their listed prices, buying guides and categories, by words. Every word must match the title or summary. Returns each result's title, kind, summary and page. These are reviews

  • research_get

    One public CEM document by its code (DOI-07, PB-011, …): its entry in CRP's search index and its markdown from work-hub content/ (located through the content_index table). Only codes CRP lists publicly are served.

  • cem_answer

    Use for any question about CEM (the Compounding Execution Method) or a term it defines, such as the Drift Tax, the Pendulum, the Governor, Sweeps, Cycles or operator levels, and for questions about building or operating with AI that CEM's research covers. Returns CEM's own defini

  • ask_cem

    A longer written answer from CEM's research, with the passages it drew on and their pages. Use it only after cem_answer, and only when the person asks to go deeper or wants more than the definition and documents give: for what a term means, cem_answer is the answer, free and inst

  • ask_op01

    OP-01's view: the operator in CEM's research, the one person whose every commit, session and dollar the research measures. By default, free and instant: OP-01's published positions that bear on the question, each with when it applies, and the closest published research; write the

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

  • ! Caution

    Maker matches the repo

    The registry lists no source repo, so we cannot match the publisher (cemresearchproject.org) to the code

  • … 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

  • ✓ Pass

    Endpoint responds

    Responded in 125 ms (HTTP 200)

  • – Not applicable

    Sign-in with OAuth

    No sign-in needed

  • ✓ Pass

    No hidden instructions in tool descriptions

    Read 14 tool descriptions and found no hidden instructions to the AI

Compared with others in Search & AI memoryi

  • More stars than 0% of the other 5676 servers in this category
  • Published to the registry more recently than 100% of the other 5676 servers in this category
  • Basic checks equal to or better than 39% of the other 5676 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 CEM safe?

It passed 2 of 3 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 (0.1.0) reached the registry today.

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: Context7, Codebase Memory, Exa

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

Context7

by upstash

Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.

Computer or cloud★ 64,224MITUpdated yesterday
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Codebase Memory

by DeusData

Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.

Runs on your computer★ 48,148MITUpdated 21 days ago
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Exa

by exa-labs

Connect AI agents to Exa for web search, content fetching, and multi-step research.

Runs in the cloud★ 5,213MITUpdated 2 months ago
Install

README from the maker

No README found in the repo

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