Locus Dev MCP Server

by jonybur-ocio.github.jonybur-oc/mcp-serverv0.6.1

User stories as structured AI coding context — scope-check via get_active_story (Claude Code, Cursor, Windsurf)

Node.jsstdioofficial registry

context tax

queued

security

queued

cold start

queued

freshness

Slowing5mo ago

Install Locus Dev MCP server

claude mcp add locus-dev -e PROTOTYPER_API_KEY='<prototyper-api-key>' -- npx -y @locus-dev/mcp-server

{
  "mcpServers": {
    "locus-dev": {
      "command": "npx",
      "args": [
        "-y",
        "@locus-dev/mcp-server"
      ],
      "env": {
        "PROTOTYPER_API_KEY": "<prototyper-api-key>"
      }
    }
  }
}

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

{
  "mcpServers": {
    "locus-dev": {
      "command": "npx",
      "args": [
        "-y",
        "@locus-dev/mcp-server"
      ],
      "env": {
        "PROTOTYPER_API_KEY": "<prototyper-api-key>"
      }
    }
  }
}

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

{
  "servers": {
    "locus-dev": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@locus-dev/mcp-server"
      ],
      "env": {
        "PROTOTYPER_API_KEY": "<prototyper-api-key>"
      }
    }
  }
}

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

{
  "mcpServers": {
    "locus-dev": {
      "command": "npx",
      "args": [
        "-y",
        "@locus-dev/mcp-server"
      ],
      "env": {
        "PROTOTYPER_API_KEY": "<prototyper-api-key>"
      }
    }
  }
}

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

Configuration

Variable	Required	Secret	Description
PROTOTYPER_API_KEY	—	yes	Optional: Locus API key for cloud team sync. Prefix ptmcp_. Not required for local stories.yaml mode.
PROTOTYPER_PROJECT_ID	—	—	Optional: Locus project UUID for cloud team sync.
LOCUS_STORIES_PATH	—	—	Optional: Explicit path to stories.yaml. Defaults to auto-discovery from project root.

Freshness

Slowing — last maintenance signal 5mo 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
2026-05-06 · 5mo ago · official registry · v0.6.1

FAQ

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

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

›Does Locus Dev require an API key?

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

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

No hosted endpoint is published; it runs locally over stdio.

›Is Locus Dev in the official MCP registry?

Yes, as io.github.jonybur-oc/mcp-server.