Shardflux MCP Server

dev.shardflux/mcpv0.12.2

Shardflux MCP server (stdio): give Claude, Cursor, Codex or any MCP client serverless VMs to run commands, edit files, use git and a browser in. Uses your scoped Shardflux API key.

Node.jsstdioremoteofficial registry

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Active2d ago

Install Shardflux MCP server

claude mcp add shardflux -e SHARDFLUX_API_KEY='<shardflux-api-key>' -- npx -y @shardflux/mcp

{
  "mcpServers": {
    "shardflux": {
      "command": "npx",
      "args": [
        "-y",
        "@shardflux/mcp"
      ],
      "env": {
        "SHARDFLUX_API_KEY": "<shardflux-api-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "shardflux": {
      "command": "npx",
      "args": [
        "-y",
        "@shardflux/mcp"
      ],
      "env": {
        "SHARDFLUX_API_KEY": "<shardflux-api-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "shardflux": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@shardflux/mcp"
      ],
      "env": {
        "SHARDFLUX_API_KEY": "<shardflux-api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "shardflux": {
      "command": "npx",
      "args": [
        "-y",
        "@shardflux/mcp"
      ],
      "env": {
        "SHARDFLUX_API_KEY": "<shardflux-api-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

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

Remote endpoints

streamable-httphttps://mcp.shardflux.dev/mcp

Freshness

Active — last maintenance signal 2d ago. The newest of the signals below sets the band.

Last commit (default branch)
no data · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-10-08 · 2d ago · official registry · v0.12.2

FAQ

›How do I install the Shardflux MCP server in Claude Code?

Run: claude mcp add shardflux -e SHARDFLUX_API_KEY='<shardflux-api-key>' -- npx -y @shardflux/mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Shardflux require an API key?

Yes. It expects SHARDFLUX_API_KEY, of which 1 is a secret.

›Can I use Shardflux as a remote (hosted) MCP server?

Yes — it offers both a hosted endpoint and a local stdio package.

›Is Shardflux in the official MCP registry?

Yes, as dev.shardflux/mcp.