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

Context Bridge

by prateekg7version 0.1.3i★ –iRuns on your computer
Registry nameio.github.prateekg7/context-bridge

Install

Overview

Description from the maker (original English)

Context portability MCP server for compressing, formatting, and resuming AI conversation handoffs.

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 on your computer
  • Transport: stdio
  • Category: Other
  • You need to fill in: OPENAI_API_KEY, CONTEXTBRIDGE_HOSTED_API_KEY

Install

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

Before you install

  • Basic checks: 1 of 1 passed
  • Runs on your computer with your user’s permissions (files, network, apps).
  • You fill in yourself: OPENAI_API_KEY, OPENAI_MODEL, CONTEXTBRIDGE_HOSTED_URL, CONTEXTBRIDGE_HOSTED_API_KEY, CONTEXTBRIDGE_HOSTED_MODEL

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

You need

  • npmNode.js installed (for the npx command)

Which app do you use?

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

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "context-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "@contextbridge_ai/mcp"
      ],
      "env": {
        "OPENAI_API_KEY": "your-value",
        "OPENAI_MODEL": "your-value",
        "CONTEXTBRIDGE_HOSTED_URL": "your-value",
        "CONTEXTBRIDGE_HOSTED_API_KEY": "your-value",
        "CONTEXTBRIDGE_HOSTED_MODEL": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add context-bridge --env OPENAI_API_KEY=your-value --env OPENAI_MODEL=your-value --env CONTEXTBRIDGE_HOSTED_URL=your-value --env CONTEXTBRIDGE_HOSTED_API_KEY=your-value --env CONTEXTBRIDGE_HOSTED_MODEL=your-value -- npx -y @contextbridge_ai/mcp

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": {
    "context-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "@contextbridge_ai/mcp"
      ],
      "env": {
        "OPENAI_API_KEY": "your-value",
        "OPENAI_MODEL": "your-value",
        "CONTEXTBRIDGE_HOSTED_URL": "your-value",
        "CONTEXTBRIDGE_HOSTED_API_KEY": "your-value",
        "CONTEXTBRIDGE_HOSTED_MODEL": "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": {
    "context-bridge": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@contextbridge_ai/mcp"
      ],
      "env": {
        "OPENAI_API_KEY": "your-value",
        "OPENAI_MODEL": "your-value",
        "CONTEXTBRIDGE_HOSTED_URL": "your-value",
        "CONTEXTBRIDGE_HOSTED_API_KEY": "your-value",
        "CONTEXTBRIDGE_HOSTED_MODEL": "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 one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

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

Values you fill in

  • OPENAI_API_KEY secret env
    Optional BYOK API key for the OpenAI Responses or chat-completions lane.
  • OPENAI_MODEL env
    Optional model override for the OpenAI BYOK lane.
  • CONTEXTBRIDGE_HOSTED_URL env
    Optional hosted inference endpoint for the no-key lane.
  • CONTEXTBRIDGE_HOSTED_API_KEY secret env
    Optional auth key for the hosted inference endpoint.
  • CONTEXTBRIDGE_HOSTED_MODEL env
    Optional hosted model identifier override.

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

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 prateekg7, 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

  • – Not applicable

    Endpoint responds

    This one runs on your computer; there is no internet endpoint

  • – Not applicable

    Sign-in with OAuth

    Runs on your computer and uses local settings instead

  • … Not checked yet

    No hidden instructions in tool descriptions

    Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

  • More stars than 0% of the other 32564 servers in this category
  • Published to the registry more recently than 9% of the other 32564 servers in this category
  • Basic checks equal to or better than 100% of the other 32564 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 Context Bridge 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: OPENAI_API_KEY, CONTEXTBRIDGE_HOSTED_API_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.3) reached the registry 6 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Tools MCP

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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.

ContextBridge

ContextBridge is a context portability tool for AI conversations. This package publishes the MCP server surface: it compresses an in-progress conversation into a structured context block that preserves the user's goal, confirmed decisions, current state, open threads, artifacts, constraints, recent pivots, and suggested next step, then formats that handoff so another AI can continue without forcing the user to restate everything.

The published npm artifact is the stdio MCP server for Claude Desktop, agent runtimes, and other MCP-compatible hosts. The browser extension runtime is developed in the same repository, but it is not part of this MCP Registry publishing flow.

Published Links

Install In Claude Desktop

Add this to your Claude Desktop MCP config (~/Library/Application Support/Claude/claude_desktop_config.json):

{

"mcpServers": { "contextbridge": { "command": "npx", "args": ["-y", "@contextbridge_ai/mcp"], "env": { "GROQ_API_KEY": "your_groq_api_key_here" } } } }

Or with OpenAI:

{

"mcpServers": { "contextbridge": { "command": "npx", "args": ["-y", "@contextbridge_ai/mcp"], "env": { "OPENAI_API_KEY": "your_openai_api_key_here", "OPENAI_MODEL": "gpt-4.1-mini" } } } }

For a hosted no-key lane instead of BYOK:

{

"mcpServers": { "contextbridge": { "command": "npx", "args": ["-y", "@contextbridge_ai/mcp"], "env": { "CONTEXTBRIDGE_HOSTED_URL": "https://your-hosted-endpoint.example/v1", "CONTEXTBRIDGE_HOSTED_MODEL": "mistralai/Mistral-7B-Instruct-v0.2" } } } }

Available MCP Tools

compress_context

Compresses a raw transcript into a structured context block.

Parameters:

  • transcript (string, required): the raw conversation transcript to compress.
  • provider ("openai" | "openai-chat" | "google" | "groq" | "custom" | "hosted", optional): provider override.
  • model (string, optional): model override for the selected lane.
  • apiKey (string, optional): BYOK API key override.
  • baseUrl (string, optional): API base URL override.
  • hostedApiKey (string, optional): optional auth key for the hosted lane.
format_for_target

Formats a compressed context block for a destination platform.

Parameters:

  • context_block (object, required): a validated ContextBridge compressed context block.
  • target ("claude" | "chatgpt" | "gemini", required): destination AI platform.
resume_context

Builds a destination-ready landing package from a compressed context block.

Parameters:

  • context_block (object, required): a validated ContextBridge compressed context block.
  • target ("claude" | "chatgpt" | "gemini", required): destination AI platform.

BYOK Setup

ContextBridge auto-selects the OpenAI Responses lane when a BYOK key is present.

Environment variables:

OPENAI_API_KEY=your_openai_api_key_here

OPENAI_MODEL=gpt-4.1-mini OPENAI_BASE_URL=https://api.openai.com/v1

Additional supported provider overrides:

GOOGLE_API_KEY=your_google_api_key_here

GOOGLE_MODEL=gemini-2.5-pro GOOGLE_BASE_URL=https://generativelanguage.googleapis.com/v1beta/openai

GROQ_API_KEY=your_groq_api_key_here GROQ_MODEL=llama-3.3-70b-versatile GROQ_BASE_URL=https://api.groq.com/openai/v1

CONTEXTBRIDGE_API_KEY=your_custom_api_key_here CONTEXTBRIDGE_MODEL=your_custom_model_here CONTEXTBRIDGE_BASE_URL=https://your-endpoint.example/v1 CONTEXTBRIDGE_PROVIDER=custom

Hosted Lane Setup

The hosted lane is the no-key path for end users who do not bring their own provider credentials.

Environment variables:

CONTEXTBRIDGE_HOSTED_URL=https://your-hosted-endpoint.example/v1

CONTEXTBRIDGE_HOSTED_MODEL=mistralai/Mistral-7B-Instruct-v0.2 CONTEXTBRIDGE_HOSTED_API_KEY=

Selection priority:

  1. Explicit apiKey option passed into compression uses the OpenAI Responses BYOK lane.
  2. OPENAI_API_KEY uses the OpenAI Responses BYOK lane.
  3. CONTEXTBRIDGE_HOSTED_URL uses the hosted lane.

Contributing

Contributions are welcome. The highest-leverage areas are extraction quality evaluation, browser collector resilience, destination formatting quality, hosted-lane infrastructure, and real-world handoff testing across platforms.

License

MIT. See LICENSE.

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