Shardflux

Name: Shardflux
Author: shardflux.dev

by shardflux.devversion 0.12.2i★ –iComputer or cloud

Registry namedev.shardflux/mcp

Install

Overview

Description from the maker (original English)

Persistent cloud workspaces for AI agents: run commands, edit files, use git and a browser.

PopNx MCP’s three pillars

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

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi0 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

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: Computer or cloud
Transport: stdio, Streamable HTTP
Category: Web & browsers
You need to fill in: SHARDFLUX_API_KEY

Install

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

Before you install

Basic checks: 0 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: SHARDFLUX_API_KEY, SHARDFLUX_API_URL, SHARDFLUX_WORKSPACE_KEY, SHARDFLUX_TEMPLATE, SHARDFLUX_MCP_TOOL_TIMEOUT_MS, SHARDFLUX_WAKE, SHARDFLUX_WAKE_TIMEOUT_MS, SHARDFLUX_AGENT_LABEL, SHARDFLUX_MCP_LOG_LEVEL, SHARDFLUX_HTTP_KEEPALIVE, SHARDFLUX_PREWAKE

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

You need

Runs in the cloudNothing to install; it connects over the internet
npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

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

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://mcp.shardflux.dev/mcp

Or run it on your computer

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

{
  "mcpServers": {
    "shardflux": {
      "command": "npx",
      "args": [
        "-y",
        "@shardflux/mcp"
      ],
      "env": {
        "SHARDFLUX_API_KEY": "your-value",
        "SHARDFLUX_API_URL": "your-value",
        "SHARDFLUX_WORKSPACE_KEY": "your-value",
        "SHARDFLUX_TEMPLATE": "your-value",
        "SHARDFLUX_MCP_TOOL_TIMEOUT_MS": "your-value",
        "SHARDFLUX_WAKE": "your-value",
        "SHARDFLUX_WAKE_TIMEOUT_MS": "your-value",
        "SHARDFLUX_AGENT_LABEL": "your-value",
        "SHARDFLUX_MCP_LOG_LEVEL": "your-value",
        "SHARDFLUX_HTTP_KEEPALIVE": "your-value",
        "SHARDFLUX_PREWAKE": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add --transport http shardflux https://mcp.shardflux.dev/mcp

Or run it on your computer

claude mcp add shardflux --env SHARDFLUX_API_KEY=your-value --env SHARDFLUX_API_URL=your-value --env SHARDFLUX_WORKSPACE_KEY=your-value --env SHARDFLUX_TEMPLATE=your-value --env SHARDFLUX_MCP_TOOL_TIMEOUT_MS=your-value --env SHARDFLUX_WAKE=your-value --env SHARDFLUX_WAKE_TIMEOUT_MS=your-value --env SHARDFLUX_AGENT_LABEL=your-value --env SHARDFLUX_MCP_LOG_LEVEL=your-value --env SHARDFLUX_HTTP_KEEPALIVE=your-value --env SHARDFLUX_PREWAKE=your-value -- npx -y @shardflux/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": {
    "shardflux": {
      "url": "https://mcp.shardflux.dev/mcp"
    }
  }
}

Or run it on your computer

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "shardflux": {
      "command": "npx",
      "args": [
        "-y",
        "@shardflux/mcp"
      ],
      "env": {
        "SHARDFLUX_API_KEY": "your-value",
        "SHARDFLUX_API_URL": "your-value",
        "SHARDFLUX_WORKSPACE_KEY": "your-value",
        "SHARDFLUX_TEMPLATE": "your-value",
        "SHARDFLUX_MCP_TOOL_TIMEOUT_MS": "your-value",
        "SHARDFLUX_WAKE": "your-value",
        "SHARDFLUX_WAKE_TIMEOUT_MS": "your-value",
        "SHARDFLUX_AGENT_LABEL": "your-value",
        "SHARDFLUX_MCP_LOG_LEVEL": "your-value",
        "SHARDFLUX_HTTP_KEEPALIVE": "your-value",
        "SHARDFLUX_PREWAKE": "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": {
    "shardflux": {
      "type": "http",
      "url": "https://mcp.shardflux.dev/mcp"
    }
  }
}

Or run it on your computer

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "shardflux": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@shardflux/mcp"
      ],
      "env": {
        "SHARDFLUX_API_KEY": "your-value",
        "SHARDFLUX_API_URL": "your-value",
        "SHARDFLUX_WORKSPACE_KEY": "your-value",
        "SHARDFLUX_TEMPLATE": "your-value",
        "SHARDFLUX_MCP_TOOL_TIMEOUT_MS": "your-value",
        "SHARDFLUX_WAKE": "your-value",
        "SHARDFLUX_WAKE_TIMEOUT_MS": "your-value",
        "SHARDFLUX_AGENT_LABEL": "your-value",
        "SHARDFLUX_MCP_LOG_LEVEL": "your-value",
        "SHARDFLUX_HTTP_KEEPALIVE": "your-value",
        "SHARDFLUX_PREWAKE": "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.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://mcp.shardflux.dev/mcp

Menu names can differ slightly by plan and over time.

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

Values you fill in

SHARDFLUX_API_KEY secret required env
Scoped Shardflux project API key (sfk_ _ ). Its tool permissions decide which workspace tools are listed.
SHARDFLUX_API_URL env
API base URL. Plain http:// is allowed only for loopback hosts.
SHARDFLUX_WORKSPACE_KEY env
Pin one workspace: workspace_key becomes optional on every tool and any other key is refused (workspace_pinned).
SHARDFLUX_TEMPLATE env
Default template slug for workspace_open.
SHARDFLUX_MCP_TOOL_TIMEOUT_MS env
Default and maximum deadline per tool call in milliseconds (1000-3600000). A call's timeout_ms can only shorten it.
SHARDFLUX_WAKE env
on: workspace tools resume a suspended workspace and then run. off: they return the workspace_not_running refusal.
SHARDFLUX_WAKE_TIMEOUT_MS env
Longest wait per tool call for a workspace to wake or finish a transition, in milliseconds (1000-3600000; clamped to SHARDFLUX_MCP_TOOL_TIMEOUT_MS).
SHARDFLUX_AGENT_LABEL env
Attribution label of every tool token this server obtains (shown as an agent session).
SHARDFLUX_MCP_LOG_LEVEL env
Log level of the JSON log lines on stderr (stdout carries the protocol).
SHARDFLUX_HTTP_KEEPALIVE env
Unset: private HTTP/1.1 pooling on Node 26, native fetch elsewhere. 0: force connection closure for diagnosis. 1: select native pooling.
SHARDFLUX_PREWAKE env
Offer explicit workspace_hint for tool input streaming (on or off).

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 7, 2026

! Caution
Maker matches the repo
The registry lists no source repo, so we cannot match the publisher (shardflux.dev) 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
… 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 Web & browsersi

More stars than 0% of the other 881 servers in this category
Published to the registry more recently than 55% of the other 881 servers in this category
Basic checks equal to or better than 22% of the other 881 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 Shardflux safe?

It passed 0 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: SHARDFLUX_API_KEY

Does it run on my computer or in the cloud?

Either way works: install it on your computer or connect to the cloud version.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.12.2) reached the registry 30 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: Browser Use, Chrome DevTools MCP, MCP Server Browser

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README from the maker

No README found in the repo

Shardflux

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Or run it on your computer

Or run it on your computer

Or run it on your computer

Or run it on your computer

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Web & browsersi

Common questions

Alternatives

Browser Use

Chrome DevTools MCP

MCP Server Browser

README from the maker