Every yacht and estate, on one watch.

Harness watches the systems aboard your vessels and inside your homes, and tells you in plain words when something needs attention.

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Two kinds of property. One way of watching.

Every vessel and every house gets the same treatment: each system live, with its own history, thresholds and the people to call.

A motor yacht at anchor at dusk, its deck lights on

Vessels

33 SYSTEMS

At anchor, underway or in the yard.

  • Bilge & watertight doors
  • Power & charging
  • Fuel, water & waste
  • Engines & generators
  • Navigation & anchor watch
  • Fire, CO & gas
  • Climate & comfort
  • Watermaker & hot water
A cabin in the snowy woods at night, its windows lit

Estates

28 SYSTEMS

Full, empty, or getting ready for an arrival.

  • Heating & cooling
  • Water, leaks & freeze
  • Power, solar & backup
  • Pool, spa & hot water
  • Security & access
  • Cellar, art & humidity
  • Fire, CO & smoke
  • Grounds, gates & snow-melt

Connects to what’s already fitted: NMEA 2000, Modbus, KNX, BACnet and most building-management systems.

At 3 a.m., it knows who to wake.

ALARM03:12 · Meridian03:12 · M/Y Meridian

High water in the engine room

Float closed · pump 2 running · 118 mm

  • Tom Reed
    Engineer · aboard
    Woken 03:12 · on his way
  • Capt. Mark Davis
    Captain · aboard
    Acknowledged 03:13
  • Emma Hart
    Owner
    Not woken · 08:00 summary
  1. 03:12
    The engine-room float closes.
    Pump 2 has already started on its own.
  2. 03:12
    Harness wakes the engineer.
    What happened, the level against its limits, and the likely cause.
  3. 03:14
    One next step.
    Pump 2 isn’t keeping up. Check the raw-water strainer.
  4. 03:31
    Cleared, on the record.
    Tom reseats the strainer lid, the level falls, and the alarm clears when the sensor does.

Ask in plain words.

About one boat, one house, or everything at once. Every answer shows the readings it’s based on.

People ask

Ask HarnessHart portfolio · 7 assets

Is Verbier ready for Friday?

Nearly. Three things are set; one needs a decision.

  • Heating
    Pre-heat starts Thu 12:00, 21 °C by Fri 16:00.
  • Hot tub
    Heats from Fri 08:00, 38 °C by arrival.
  • Wine cellar
    12.5 °C, humidity 68 %.
  • Snow-melt on the drive is off
    10 cm forecast Thursday night.

Rules, in a sentence.

Say what you want watched. Harness writes the rule, tells you what it assumed, and tests it against the last 30 days before you switch it on.

Also try

Comporta · door opened while empty

DRAFT
WHEN
Any outside door opens
6 door contacts
AND
Comporta is in Away mode
no one booked in
THEN
Call Emma, then text Ray (caretaker)
priority: alarm

Assumed “empty” means Away mode is set. Housekeeping comes Tuesdays 09:00 to 13:00. Leave those hours out?

Back-test · last 30 daysWould have fired 4 times · all Tuesday housekeeping
14 SEP13 OCT
Nothing fires until you turn it on

Your portfolio, inside Claude and ChatGPT.

Harness runs a private MCP server for your portfolio. Add it once, then ask from the assistant you already use.

YOUR SERVERONLINE
https://hart.harnessmonitoring.com/mcp
  1. Copy your server address from Harness › Settings › Assistants.
  2. Add it as a custom connector in Claude or ChatGPT.
  3. Approve the request on your phone. Revoke it any time.
  • Read-only access
  • You approve each person
  • Revoke in one tap
Your assistantConnector · Harness

Summarise last night across the boats and houses.

Used Harness · get_activity · since 18:00

A quiet night apart from two alarms, both handled overnight:

  • Meridian took on water in the engine room at 03:12. The raw-water strainer lid had lifted; Tom reseated it, and it was cleared by 03:31.
  • Verbier’s boiler locked out at 02:47. Luke reset it at 03:11, and the pipes never dropped below 11 °C.

Nothing needs you this morning. Worth knowing: that’s Verbier’s second lockout in 30 days, so a service before Friday would be sensible.

Calm until it counts.

  • Acknowledged isn’t cleared

    Silencing stops the calls. Only the sensor clears the alarm.

  • One next step

    Every alarm arrives with the likely cause, what to check, and who to call.

  • On the record

    Every alarm, call and change is logged: who, when and from where.

  • Private by design

    You approve every person and assistant, and can revoke them in one tap.

See it on a real portfolio.

Three yachts and four homes, running on sample data.

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