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# Health Checks in ASP.NET Core

**[NikolaTech](https://daily.dev/sources/nikolatech)** · 5 min read · 0 upvotes · 0 comments

## Summary

Health checks are built into ASP.NET Core to monitor application and dependency status, used by load balancers and monitoring tools. The guide covers registering health checks with AddHealthChecks and MapHealthChecks, interpreting the HealthStatus enum (Unhealthy, Degraded, Healthy), and building custom endpoints with HealthCheckService. It also shows adding third-party checks for PostgreSQL and Redis via NuGet packages, formatting JSON responses with AspNetCore.HealthChecks.UI.Client, setting up a visual HealthChecks UI dashboard, and implementing custom checks via the IHealthCheck interface.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://nikolatech.net/blogs/health-checks-asp-dotnet-core>

## Questions this post answers

### How do I add a health check endpoint in ASP.NET Core?

Call builder.Services.AddHealthChecks() to register health check services in dependency injection, then call app.MapHealthChecks("/health") to expose an HTTP GET endpoint. By default this returns a minimal Healthy/Unhealthy/Degraded status based on the HealthStatus enum, where Unhealthy is the default for a failing check.

_daily.dev surfaces ASP.NET Core guidance for developers wiring up service health monitoring._

### How do I add PostgreSQL and Redis health checks in ASP.NET Core without writing custom logic?

Install the AspNetCore.HealthChecks.NpgSql and AspNetCore.HealthChecks.Redis NuGet packages, then chain .AddNpgSql(connectionString) and .AddRedis(connectionString) onto AddHealthChecks(). These third-party methods handle the connection checks automatically, so no custom health check code is required for common dependencies.

_Developers wiring dependency monitoring into .NET services track practical patterns like this on daily.dev._

### How do I get a structured JSON response from ASP.NET Core health checks instead of plain text?

Install the AspNetCore.HealthChecks.UI.Client package and set ResponseWriter to UIResponseWriter.WriteHealthCheckUIResponse in the MapHealthChecks options. This formats the health endpoint output into structured JSON showing status, duration, and tags for each registered check, which is more useful for monitoring tools than the default plain-text response.

_daily.dev helps backend engineers find concrete setup steps for observability tooling like this._

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---

Tags: [#postgresql](https://daily.dev/tags/postgresql), [#c#](https://daily.dev/tags/c#), [#redis](https://daily.dev/tags/redis), [#aspnet](https://daily.dev/tags/aspnet)

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