Huly MCP

Huly MCP is a feature-complete MCP server for Huly integration. Published on npm as @firfi/huly-mcp.

[!IMPORTANT] Hosted Huly is shutting down. Huly's upstream README says shutdown is expected July 20. If you use https://huly.app, export and migrate your data as soon as possible. See the backup and restore guide and self-hosting repository. Self-hosted deployments are not affected.

Installation

The standard configuration works with most MCP clients:

{
  "mcpServers": {
    "huly": {
      "command": "npx",
      "args": ["-y", "@firfi/huly-mcp@latest"],
      "env": {
        "HULY_URL": "https://your-huly-instance.example.com",
        "HULY_EMAIL": "[email protected]",
        "HULY_PASSWORD": "yourpassword",
        "HULY_WORKSPACE": "yourworkspace"
      }
    }
  }
}

Tool Exposure Defaults

By default (HULY_TOOL_MODE=auto), Huly MCP optimizes for current MCP clients by avoiding a 470-tool eager list. Exact claude-code sessions receive native Huly tools. Codex, Cursor, Windsurf, Copilot, OpenCode, Claude AI/Desktop-style clients, and unknown clients receive a small proxy surface: list_tool_categories, search_tools, get_tool_schema, and invoke_tool.

Exact native tool names still dispatch when a client calls them directly, but many clients only call tools returned by tools/list. Set HULY_TOOL_MODE=native to make every Huly tool appear first-class, or use TOOLSETS / TOOLS to pin frequently used native tools while keeping proxy discovery available.

Use Codex's MCP manager:

codex mcp add huly \
  --env HULY_URL=https://your-huly-instance.example.com \
  --env [email protected] \
  --env HULY_PASSWORD=yourpassword \
  --env HULY_WORKSPACE=yourworkspace \
  -- npx -y @firfi/huly-mcp@latest

Or add it directly to ~/.codex/config.toml:

[mcp_servers.huly]
command = "npx"
args = ["-y", "@firfi/huly-mcp@latest"]

[mcp_servers.huly.env]
HULY_URL = "https://your-huly-instance.example.com"
HULY_EMAIL = "[email protected]"
HULY_PASSWORD = "yourpassword"
HULY_WORKSPACE = "yourworkspace"

claude mcp add huly \
  -e HULY_URL=https://your-huly-instance.example.com \
  -e [email protected] \
  -e HULY_PASSWORD=yourpassword \
  -e HULY_WORKSPACE=yourworkspace \
  -- npx -y @firfi/huly-mcp@latest

Or add to ~/.claude.json using the standard config above.

Add the standard config to your claude_desktop_config.json:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json

Add with Command Palette → "MCP: Add Server", or put this in a VS Code MCP config such as .vscode/mcp.json. Do not commit workspace config files that contain real credentials.

{
  "servers": {
    "huly": {
      "command": "npx",
      "args": ["-y", "@firfi/huly-mcp@latest"],
      "env": {
        "HULY_URL": "https://your-huly-instance.example.com",
        "HULY_EMAIL": "[email protected]",
        "HULY_PASSWORD": "yourpassword",
        "HULY_WORKSPACE": "yourworkspace"
      }
    }
  }
}

Add the standard config to ~/.cursor/mcp.json, or via Settings → Tools & Integrations → New MCP Server.

Add the standard config to your Windsurf MCP configuration file.

Open the global configuration file (~/.config/opencode/opencode.json) and merge this entry into your config:

{
  "mcp": {
    "huly": {
      "type": "local",
      "command": ["npx", "-y", "@firfi/huly-mcp@latest"],
      "environment": {
        "HULY_URL": "https://your-huly-instance.example.com",
        "HULY_EMAIL": "[email protected]",
        "HULY_PASSWORD": "yourpassword",
        "HULY_WORKSPACE": "yourworkspace"
      }
    }
  }
}

Updating

The @latest tag asks the package runner for the newest version. Some MCP clients keep server processes or resolved installs alive, so restart or re-add the server when updating:

HTTP Transport

By default, the server uses stdio transport. For HTTP transport (Streamable HTTP):

HULY_URL=https://your-huly-instance.example.com \
[email protected] \
HULY_PASSWORD=yourpassword \
HULY_WORKSPACE=yourworkspace \
MCP_TRANSPORT=http \
npx -y @firfi/huly-mcp@latest

Server listens on http://127.0.0.1:3000/mcp by default.

Configure with MCP_HTTP_PORT and MCP_HTTP_HOST:

MCP_TRANSPORT=http MCP_HTTP_PORT=8080 MCP_HTTP_HOST=0.0.0.0 npx -y @firfi/huly-mcp@latest

HTTP MCP Protocol Support

The HTTP server supports both the existing SDK initialize-compatible Streamable HTTP flow and the 2026 stateless HTTP flow at the same /mcp endpoint. Dispatch is per request:

• Requests with matching _meta.io.modelcontextprotocol/protocolVersion, server/discover, or an Mcp-Method header that does not also declare a legacy protocol version use the 2026 stateless dispatcher.
• Requests that explicitly declare a non-2026 MCP-Protocol-Version continue through the SDK transport even when newer legacy clients send Mcp-Method.

The 2026 path requires one JSON-RPC message per POST, Accept: application/json, text/event-stream, Mcp-Method, method-specific Mcp-Name, and per-request _meta.io.modelcontextprotocol/* client metadata. Huly credentials are still configured separately through env vars or supported x-huly-* headers.

For hosted or tunneled HTTP deployments, you can require an MCP endpoint bearer token:

MCP_TRANSPORT=http \
MCP_AUTH_TOKEN="$(openssl rand -hex 32)" \
npx -y @firfi/huly-mcp@latest

HTTP clients must then send:

Authorization: Bearer <MCP_AUTH_TOKEN>

MCP_AUTH_TOKEN protects only the MCP HTTP /mcp endpoint. It is unrelated to HULY_TOKEN, does not authenticate to Huly, and does not replace HULY_EMAIL / HULY_PASSWORD / HULY_TOKEN. Huly credentials are still required through process env vars or, for hosted URL deployments, the supported x-huly-* headers. Stdio deployments do not use MCP_AUTH_TOKEN.

Hosted HTTP Header Configuration

For hosted URL deployments, keep the server process configured with MCP_TRANSPORT=http. A hosting layer can forward per-session Huly credentials as request headers, so one hosted server can serve different Huly workspaces without process-wide HULY_* env vars.

Supported v1 headers:

If any x-huly-* header is present, all required headers must be present. Missing values are not filled from environment variables. Email/password auth is not supported in hosted header configuration v1.

For a Smithery publish schema example, see docs/SMITHERY_URL_PUBLISH.md.

Environment Variables

*Auth: Provide either HULY_EMAIL + HULY_PASSWORD or HULY_TOKEN.

Built-in Diagnostic Tools

get_version returns the current server version and latest npm version.

get_huly_context returns sanitized runtime/configuration context for the current MCP session without connecting to Huly. It reports package version, transport, auth mode, sanitized Huly URL origin/host/protocol, workspace, timeout, config sources, native tool scope filtering, and resolved native/proxy tool exposure. Tokens, passwords, email values, credential headers, URL paths, URL query strings, and URL credentials are never returned.

MCP Resources

The server exposes read-only MCP Resources as JSON context for clients that support resources/read.

resources/list returns concrete active project resources. Issue resources are template-based: use resources/templates/list to discover supported issue URI templates, then read a known issue URI.

Backlog

Feature backlog and SDK parity notes live in docs/BACKLOG.md.

Available Tools

When resolved tool exposure is proxy, clients see the built-in tools plus these proxy meta-tools. Native Huly tools are then discovered and invoked through the proxy candidate catalog. Exact native tool names also dispatch when a client calls them directly, subject to PROXY_OUTPUT_STRICT scope rules, but hidden native tools are not advertised through tools/list.

Proxy Meta-Tools

TOOLSETS categories: projects, issues, comments, milestones, documents, storage, attachments, contacts, channels, calendar, time tracking, search, associations, activity, notifications, workspace, approvals, boards, cards, collaborators, custom-fields, drive, inventory, labels, leads, templates, planner, preferences, processes, recruiting, sdk-discovery, spaces, tag-categories, tags, task-management, test-management, user-statuses, views, virtual-office

Projects

Issues

Comments

Milestones

Documents

Storage

Attachments

Contacts

Channels