---
title: "HealthCheck"
description: "a signal that can fail, its vacuity guard, and where it runs"
section: concepts
address: /concepts/healthcheck
contract: 0476e35e6e275db5
---

# HealthCheck

a signal that can fail, its vacuity guard, and where it runs

[figure: HealthCheck is a row at platform scope. The drawing shows its fields and the objects that they point at.]

| property | value |
|---|---|
| kind | row |
| scope | platform |
| key | the service |
| store | postgres |
| family | operations |



## Fields


| field | type | required | note |
|---|---|---|---|
| `service` | `text` | yes |  |
| `signal` | `text` | yes |  |
| `vacuity_guard` | `text` | yes |  |
| `runs_on` | `one of the server` | yes |  |



## Routes that use it
No route takes or returns HealthCheck directly. The record holds it, and the objects that point at it reach it.