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Cofounder

by General-Intelligence-Companyversion 0.1.24i★ –iRuns in the cloud
Registry nameio.github.General-Intelligence-Company/cofounder-plugin

Install

Overview

Description from the maker (original English)

Company context and tools for research, CRM, email, social publishing, and roadmaps.

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: Marketing & social media

Install

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

Before you install

  • Basic checks: 3 of 3 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://api.cofounder.co/mcp

Run this in your terminal

claude mcp add --transport http cofounder-plugin https://api.cofounder.co/mcp

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "cofounder-plugin": {
      "url": "https://api.cofounder.co/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": {
    "cofounder-plugin": {
      "type": "http",
      "url": "https://api.cofounder.co/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://api.cofounder.co/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

The server asks you to sign in before it lists its tools.

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 7, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified with the GitHub account General-Intelligence-Company, which owns the repo

  • … 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 325 ms (HTTP 401)

  • ✓ Pass

    Sign-in with OAuth

    Declares OAuth sign-in, so your AI app can take you to log in

  • … 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 Marketing & social mediai

  • More stars than 0% of the other 2985 servers in this category
  • Published to the registry more recently than 80% of the other 2985 servers in this category
  • Basic checks equal to or better than 100% of the other 2985 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 Cofounder safe?

It passed 3 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 (0.1.24) reached the registry 8 days 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: MCP YouTube Transcript, Google Analytics MCP, BibiGPT YouTube Video Summarizer

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

An MCP server retrieving transcripts of YouTube videos

Runs on your computer★ 495MITUpdated 10 days ago
Install

GA4 MCP server for AI agents: schema discovery, server-side aggregation, analysis-ready defaults.

Runs on your computer★ 244MITUpdated 10 days 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.

Cofounder Plugin

cofounder.co

Build and run your company from your agent. Cofounder gives it shared company knowledge, a roadmap, and tools for research, customer relationships, email, social publishing, brand creation, and infrastructure.

Start with setup, then keep working with the same company context across tasks. Explore the tools.

Install

Follow the steps for your app, then sign in to Cofounder.

ChatGPT and Codex
  1. Open Plugins and search for Cofounder.
  2. Choose Install or the plus button, then sign in when prompted.
  3. Start a new chat to use the plugin.

Not listed? In Codex, add the marketplace below. In a ChatGPT workspace, ask an admin to import it. This import requires the ChatGPT desktop app to install and use the plugin.

Using a personal ChatGPT account? The workspace import steps below don't apply. If Cofounder isn't in your Plugins directory, contact support for help.

Add the marketplace to ChatGPT

A workspace admin completes these steps:

  1. Open Admin > Plugins > Add > Import marketplace.
  2. Set Source to https://github.com/General-Intelligence-Company/cofounder-plugin.
  3. Leave Path and Branch, tag, or commit empty, then select Import marketplace and connect GitHub when prompted.
  4. Make Cofounder available to workspace members. They can then install it from Plugins in the ChatGPT desktop app and sign in.

OpenAI's import guide.

Add the marketplace to local Codex

  1. Open Plugins > Add > Add a marketplace.
  2. Set Source to General-Intelligence-Company/cofounder-plugin.
  3. Leave Git ref and Sparse paths empty, then select Add marketplace.
  4. Open Cofounder, choose Install, and sign in when prompted. Start a new local chat to use it.

You can also use the CLI commands below. These configure local Codex; they don't import the plugin into a ChatGPT workspace.

Claude desktop app and Cowork
  1. Open Customize > Plugins. For Cowork, open the Cowork tab first.
  2. Choose Add > Add marketplace > Add from a repository.
  3. Enter https://github.com/General-Intelligence-Company/cofounder-plugin and select Sync.
  4. Open Cofounder and choose Add or Install.
  5. Open its Connectors tab, connect Cofounder, and sign in. Start a new conversation or Cowork task.

Claude's installation guide. For Claude Code, use the CLI commands below. Installing through the CLI doesn't add the plugin to your Claude app account.

Cursor

Team marketplace admins can import this repository through Dashboard > Plugins & MCPs, then make Cofounder available to their team. Install Cofounder from that marketplace and connect its MCP server to sign in.

The repository includes a Cursor marketplace and plugin manifest, as well as the portable Agent Plugins format. Public marketplace availability requires a separate submission and review.

Cursor plugin installation.

Grokbot

Grokbot can use the same plugin after it is available in its plugin catalog. Until then, ask your Bot:

Add the Cofounder MCP server at https://api.cofounder.co/mcp, then help me get started

with Cofounder.

Complete the native connection and sign-in prompts, then send another message if the new tools are not available yet. No API key is bundled with the plugin.

Other MCP clients

Add https://api.cofounder.co/mcp as a remote Streamable HTTP server with OAuth authentication, then sign in to Cofounder. Ask your agent: “Help me get started with Cofounder.”

Agent installation guide · Official MCP Registry listing.

Optional: ask your agent to help with installation

Help me install the Cofounder plugin in this app:

https://github.com/General-Intelligence-Company/cofounder-plugin Then help me connect my Cofounder account.

Your agent may guide you through the steps rather than install it directly.

Get started

Once connected, ask:

Help me get started with Cofounder.

Your agent will help you choose or create a company and find the next step. Then try: “Show me our roadmap and help me with the next milestone.”

Need help?

Contact support, or check the fixes below.

Troubleshooting

  • Tools aren't available? Finish signing in, then start a new chat. In Codex, open Plugins > Cofounder > Authenticate. In Claude Code, use /mcp; in the Claude app, open the plugin's Connectors tab.
  • ChatGPT says “Desktop only”? Open the ChatGPT desktop app to install and use this imported plugin.
  • Codex asks for a cloud environment? Start a local chat; cloud environments don't carry your local plugin sign-in.
  • Windows install error (SEC_E_NO_CREDENTIALS, “access denied,” or missing home directory)? Use the Plugins UI or run the CLI commands in your own PowerShell window.

Keep the plugin updated

  • ChatGPT workspace: an admin opens Admin > Plugins > Marketplaces, selects Cofounder, and chooses Sync now.
  • Codex: choose Upgrade marketplace for Cofounder in plugin settings.
  • Claude app and Cowork: choose Check for updates on the marketplace.

Start a new chat or task after updating.

Command-line installation

Install from the command line (for agents)

Run these in your terminal. On Windows, use your own PowerShell window if an agent's sandbox blocks installation. Update the client if a command is missing.

Codex

codex plugin marketplace add General-Intelligence-Company/cofounder-plugin

codex plugin add cofounder@cofounder codex plugin list

If sign-in didn't finish, run codex mcp list, then codex mcp login with the Cofounder server name it shows. Start a new chat afterward.

Claude Code

claude plugin marketplace add General-Intelligence-Company/cofounder-plugin

claude plugin install cofounder@cofounder --scope user claude plugin list

Run /mcp in Claude Code to sign in, then start a new session.

Codex commands · Claude Code commands.

Source and releases

Plugin files come from the production source in Superoptimizers. All three marketplace names and the plugin name are cofounder. Release provenance is recorded in publication.json.

Publication also regenerates this README from scripts/export_cofounder_plugin_repository.py. Make lasting README changes in that source template.

Documentation · Privacy · Terms. The plugin package is open source under the MIT License. The hosted Cofounder service is governed by its Terms of Service.

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