Liongard MCP Server

Liongard MCP Server

An MCP (Model Context Protocol) server for interacting with the Liongard platform. Provides AI assistants with tools to manage inspectors, systems, metrics, alerts, users, and more through Liongard's API.

One-Click Deployment

[!IMPORTANT] Before you click: this server depends on @wyre-technology/node-liongard, which is hosted on the GitHub Packages npm registry. GitHub Packages has no anonymous access — even though the package is public, every npm install needs a token. The cloud builder runs npm install for you, so you must give it one, or the build fails with npm error 401 Unauthorized ... npm.pkg.github.com.

1. Create a GitHub Personal Access Token with the read:packages scope (classic token). Any GitHub account works — you do not need to be a member of the wyre-technology org to read its public packages.
2. Add it as a build variable when prompted by the deploy flow:
   • Cloudflare Workers → set a build variable named NODE_AUTH_TOKEN to your PAT (Workers → Settings → Build → Variables and Secrets).
   • DigitalOcean App Platform → set an encrypted env var named GITHUB_TOKEN with scope Build Time to your PAT (the Dockerfile reads it for the install).

Features

• Decision-tree tool architecture — starts with a navigation tool, then exposes domain-specific tools on demand
• 25 tools across inspectors, systems, metrics, alerts, users, groups, environments, and integrations
• Interactive detection card via MCP Apps (SEP-1865): liongard_detections_get renders as a read-only card in MCP Apps hosts (Claude Desktop/web) with severity/status badges and server-resolved system/environment names — neutral by default, brandable via window.__BRAND__ injection or MCP_BRAND_* env vars (MCP_BRAND_NAME, MCP_BRAND_LOGO_URL, MCP_BRAND_PRIMARY_COLOR, MCP_BRAND_ACCENT_COLOR, MCP_BRAND_BG, MCP_BRAND_TEXT), no rebuild needed
• Dual API version support (v1 and v2)
• 128 tests

Installation

This project depends on @wyre-technology/node-liongard, published to the GitHub Packages npm registry, which requires a token even for public packages. Authenticate once, then install:

# Authenticate npm to GitHub Packages (token needs the read:packages scope)
export NODE_AUTH_TOKEN=$(gh auth token)   # or a PAT with read:packages

npm install

The repo's .npmrc already points the @wyre-technology scope at GitHub Packages and reads the token from NODE_AUTH_TOKEN, so no further config is needed.

Configuration

Copy .env.example. Stdio and AUTH_MODE=env read the Liongard variables. Gateway mode does not.

/health stays unauthenticated and does not read credentials. The stdio transport does not use CONDUIT_S2S_SECRET.

HTTP authentication

With MCP_TRANSPORT=http and CONDUIT_S2S_SECRET set, every /mcp request must include X-Gateway-S2S. The value is t=<unix seconds>,v1=<hex>, where v1 is HMAC-SHA256 of the exact string t=<unix seconds> keyed by CONDUIT_S2S_SECRET (64 lowercase hex characters). The timestamp must be within 300 seconds of the server clock. A missing or invalid header returns 401. The secret is never written to logs.

import { createHmac } from "node:crypto";

const t = Math.floor(Date.now() / 1000);
const v1 = createHmac("sha256", process.env.CONDUIT_S2S_SECRET)
  .update(`t=${t}`)
  .digest("hex");
const xGatewayS2s = `t=${t},v1=${v1}`;

In AUTH_MODE=gateway, /mcp also requires X-Liongard-API-Key and X-Liongard-Instance. Those headers are the only credential source for that request. A request missing either header returns 401 and does not read LIONGARD_API_KEY or LIONGARD_INSTANCE from the environment.

Docker Compose

The checked-in Compose service is gateway mode. It publishes 127.0.0.1:8080:8080, requires CONDUIT_S2S_SECRET, and does not set LIONGARD_API_KEY, LIONGARD_INSTANCE, or env_file.

CONDUIT_S2S_SECRET=your-s2s-secret docker compose up --build

Usage

npm start

HTTP refuses to start until CONDUIT_S2S_SECRET is a real secret:

MCP_TRANSPORT=http CONDUIT_S2S_SECRET="$CONDUIT_S2S_SECRET" npm start

Local HTTP without a secret is development-only. It binds 127.0.0.1 and logs a warning:

MCP_TRANSPORT=http MCP_ALLOW_INSECURE_DEV=1 npm start

Development

npm run build       # Build the project
npm run test        # Run tests
npm run lint        # Run linter
npm run typecheck   # Type-check

License

Apache-2.0