Kaseya Bms MCP Server

Kaseya BMS MCP Server

Model Context Protocol (MCP) server for the Kaseya BMS PSA API. Exposes tickets, accounts, contacts, contracts, time entries, the service catalog, and the knowledge base to AI assistants.

Tools

When the user omits required filters or runs a destructive action, the server uses MCP elicitation to prompt for choices or confirm.

Interactive Ticket Card (MCP Apps)

kaseya_bms_get_ticket renders as an interactive card in MCP Apps hosts (Claude Desktop/web) with an in-card "Add note" round-trip via kaseya_bms_add_ticket_note (always posted internal-only); plain-JSON behavior is unchanged in other hosts. The card is neutral by default and 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. After editing ui/, regenerate the embedded bundle with npm run build:ui.

Configuration

Copy .env.example. Stdio and AUTH_MODE=env read the Kaseya BMS 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-Kaseya-BMS-Tenant-Subdomain and either X-Kaseya-BMS-API-Token or X-Kaseya-BMS-K1-Token. Those headers are the only credential source for that request. A request missing them returns 401 and does not read KASEYA_BMS_* from the environment. Each request creates a fresh server instance with isolated credentials.

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 KASEYA_BMS_TENANT_SUBDOMAIN, KASEYA_BMS_API_TOKEN, KASEYA_BMS_K1_TOKEN, or env_file. The image build reads GitHub Packages credentials from the npmrc build secret (the repo .npmrc only sets the registry).

CONDUIT_S2S_SECRET="$(openssl rand -hex 32)" docker compose up --build

Single-tenant HTTP (AUTH_MODE=env) still requires the S2S secret, then uses KASEYA_BMS_*:

docker build -t kaseya-bms-mcp .
docker run --rm \
  -e CONDUIT_S2S_SECRET="$(openssl rand -hex 32)" \
  -e AUTH_MODE=env \
  -e KASEYA_BMS_TENANT_SUBDOMAIN=yourcompany \
  -e KASEYA_BMS_API_TOKEN=... \
  -p 127.0.0.1:8080:8080 \
  kaseya-bms-mcp

Local development

npm install
npm run build
KASEYA_BMS_TENANT_SUBDOMAIN=yourcompany \
  KASEYA_BMS_API_TOKEN=... \
  npm start

HTTP refuses to start until CONDUIT_S2S_SECRET is a real secret:

MCP_TRANSPORT=http CONDUIT_S2S_SECRET="$(openssl rand -hex 32)" npm start
curl http://127.0.0.1:8080/health

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

License

Apache-2.0