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Vaicoa

What the Vaicoa app does

The Vaicoa app is a monitoring baseline for infrastructure on Hetzner. It shows everything you run, what it costs and what needs your attention, and when something does, it gives you, or your coding agent, a place to start. It is read-only, quick to set up and cheap enough to leave on everywhere.

It runs on the iPhone, and the portal in the browser is where you set up an account, a team and what Vaicoa watches. Where to use the Vaicoa app lists what each one can do. Vaicoa reads Hetzner with a read-only API token and cannot reboot, delete or change anything.

See, notice, act

Section titled “See, notice, act”

Three verbs describe what Vaicoa does. Each builds on the one before, and each section says which plan it needs.

See

Section titled “See”

Every resource in your Hetzner Cloud projects, its state and what it has cost so far this month, in one list across projects. Search finds a resource by name, ID or IP address, and each one opens to its details and charts, without logging in to the Hetzner Console.

This needs no account. In free mode the app reads the Hetzner Cloud API directly from your phone with your read-only token, and calculates the cost estimate on the device. The token stays on the device. Free mode records nothing while the app is closed: you see what Hetzner reports now, and the chart ranges Hetzner provides, the last hour and the last 24 hours.

Notice

Section titled “Notice”

The dashboard puts what needs your attention first. It ranks every row: what is wrong now, then what is fine now but had trouble in the last 30 days, then what costs more than last month. Rows with nothing to report are only counted. See The dashboard. In free mode, which keeps no history, the ranking has the first of these: what Hetzner reports as not in its normal state now.

For this, Vaicoa adds signals that the Hetzner Cloud API does not give:

  • Uptime checks test your websites, ports and certificates from outside, from two independent networks, inside and outside Hetzner. A free Vaicoa account gets 8 checks across up to 4 targets, and they keep running while your phone is off.
  • The Vaicoa agent on your servers adds real disk and RAM usage and the warning log lines of the last 72 hours. It also covers dedicated (Robot) servers, which are not in the Hetzner Cloud API. Vaicoa Pro and Vaicoa Team.
  • Job reports say when a backup or cron job fails or stops running. Pro and Team.
  • History: 30 days of metrics and cost history on Pro, 90 days on Team.

Alerts start with Pro: push notifications, an email digest and alert targets for your own tools. They fire only when the signal is real. A check counts as down only when both networks agree, and a grey day means no data, not down.

Act

Section titled “Act”

An alert opens on the affected resource, with the context to decide: what fired and since when, the server’s recent warning log lines, its jobs and checks, and Hetzner’s recent events for it. From there you can:

  • mute the alert while you work on it;
  • share a brief with a colleague, or use Copy for coding agent to hand the issue to a coding agent such as Claude Code;
  • let Claude query Vaicoa itself through the Claude connector;
  • send alerts into your own tools through webhook targets, and on Team also PagerDuty;
  • open the Hetzner Console to make the change.

Briefs work on every plan, free mode included. Alerts, the connector and alert targets need Pro or Team.

Vaicoa never makes the change itself. You make it, or your coding agent proposes it through your own process, for example as a pull request that a person reviews and merges.

A baseline, not a platform

Section titled “A baseline, not a platform”

Vaicoa deliberately leaves out what larger monitoring tools do. These limits are why it is cheap, quiet and safe to install everywhere.

  • It is not a log platform. It keeps warning-level journald lines for 72 hours, not every line forever. The data per server stays small and predictable.
  • It is not APM or tracing. The agent collects a fixed set of OS metrics, not your application’s internals. There is nothing to instrument.
  • It is not a management console. It is read-only. Changes happen in the Hetzner Console or in your infrastructure code, so a lost phone or a wrong tap cannot reboot or delete a server.
  • It is not a dashboard builder. The views are predefined and ranked for attention, so there is nothing to configure before they are useful.

When you need more than this, Vaicoa still tells you where to look.

Where the data comes from

Section titled “Where the data comes from”
How Vaicoa collects dataHetzner Cloud servers appear in the Hetzner Cloud API, which the app reads directly in free mode with a read-only token that never leaves the device. On Pro and Team, the Vaicoa agent — installed on cloud servers and on dedicated Robot servers, which the Cloud API does not cover — adds OS-level metrics and WARN-and-worse log lines, and carries the results of your own backup and cron jobs. Uptime checks run the other way round: Vaicoa probes your own endpoints from its own locations, from outside, and those endpoints need not be Hetzner machines at all — four check targets come with a free account. All of it arrives at Vaicoa and leaves again three ways: in the app as alerts, charts and job reports; on Pro and Team as alerts that reach you by push notification, email digest, ntfy topic or webhook; and through the read-only MCP connector, which a coding agent can ask about your fleet.Hetzner Cloud serversagentdisk · RAM · loadWARN+ log linesDedicated servers (Robot)agentnot in the Cloud APIBackup & cron jobscloudviewer-reportYour endpointsat Hetzner or anywhere elseapi.example.comOur own locationsuptime checks, Free toofrom outsideVaicoaHetzner Cloud APIinventory · CPU · networkconnected projectfree modeAlertsChartsJob reportsVaicoa appAlerts reach youPush notificationEmail digestntfy topicWebhookCoding agentMCP · read-onlyFree mode — your device reads the Hetzner CloudAPI directly; the read-only token never leaves it.Pro and Team — the agent adds OS metrics, WARN+ logs,job results and dedicated servers; alerts and MCP too.Uptime checks — probed from our own locations,from outside; four targets even on a free account.

Cloud servers, load balancers, volumes, IPs and the rest of a Hetzner Cloud project come from the Hetzner Cloud API. In free mode the app reads it from your phone. With Pro and Team, Vaicoa’s servers read it every 5 minutes, whether the app is open or not. The agent adds OS metrics, warning log lines, dedicated servers and the results of your own jobs. Uptime checks go the other way: Vaicoa’s servers send them to your endpoints, which do not have to be at Hetzner.

Where to start

Section titled “Where to start”
Quick startSample data, your own token or a free account: a first result in a few minutes.
Choose your setupFree mode, free account, Pro or Team, and what each one adds.
Install the agentDisk, RAM and warning log lines from inside your servers.
Watch a website or portUptime checks from outside your network, also while your phone is off.
Send alerts where you workPush, an email digest, webhooks and PagerDuty.
Hand off to a coding agentGive an agent the brief, and review the change it proposes.