Pricing and billing

monsys bills per monitored system, daily pro rata, monthly in arrears via Stripe or PayPal.

Kind	Counts as a system when	Price per month
Server (agent)	is_active and not stale	€3
Website (WordPress, Drupal via plugin)	connected and verified, not revoked	€2
Cloud account	discovery enabled	€5
Uptime check, status page	never	€0
AI app	active (first one free)	€3, plus €1 per 10k traces above fair use

Free tier

The first 5 systems of any kind are free, without time limit and without a payment method. Free slots go automatically to your most expensive systems: cloud accounts first, then servers, then websites.

Once a tenant has 5 systems and no payment method, adding a sixth (enrolling an agent, connecting a website, creating a cloud account) returns 402 payment_method_required with the kind and price in the body. The portal then shows the button to Billing.

Discount and minimum

• Volume, on the monthly average of paid systems: above 50 −20 %, above 200 −35 %.
• Minimum invoice €9 per month once anything is billable.
• MSP partners: tiers across all tenants, on request.

How it is computed

A daily worker records per tenant how many systems of each kind were active and billable (billing_daily_usage). On the first of the month the invoice worker sums system-days per kind, applies the discount and the minimum, and stores the breakdown in billing_invoices.detail:

server-days × €3 / 30 + website-days × €2 / 30 + cloud-days × €5 / 30
= gross − volume discount = net (at least €9)

In the portal under Billing you see active systems per kind, how many are billable and this month’s projection; GET /api/v1/billing/status returns the same numbers.