
Building an API Gateway with Koa and AppSignal
Learn how to build a small Koa-based API gateway that validates requests, fans out to upstream APIs, enriches responses, and reports errors and performance to AppSignal.
AppSignal APM combines performance monitoring and error tracking in one clear interface.

Learn how to build a small Koa-based API gateway that validates requests, fans out to upstream APIs, enriches responses, and reports errors and performance to AppSignal.

Extract counters, gauges, and measurements from any log source at ingestion. Track 5xx rates, p95 latency, and queue depth as metrics. In beta in AppSignal Labs.

Here's how you can have a PaaS-like experience while keeping all of your services in Europe with AppSignal and Hatchbox.

We'd rather get an earlier version of something into your hands than spend another quarter polishing it. AppSignal Labs is where that work lives. Real features you can use today, still being shaped by what you tell us.

Here's how to deploy a Node.js app to a Hetzner VPS with Hatchbox and monitor it with AppSignal.

Hatchbox makes deployment easy. Here's how to use AppSignal to monitor memory, CPU, disk, and load on your Rails app.

Sidekiq jobs fail quietly. Here's how to catch slow jobs, retry storms, and queue backlogs with AppSignal before your users notice.

This is the story of how we went from a minimal keyword-only search on docs.appsignal.com to a conversational Ask AI experience — and what we learned along the way.

The PaaS era isn't over, but it's definitely changing. Here's what's changed and what the modern stack looks like instead.

CPU spikes and memory leaks don't announce themselves. Here's how to catch them on your VPS before your users do.

Hatchbox and AppSignal are teaming up to bring error tracking, host insights, and uptime monitoring directly into your workflow. Affordable hosting and serious monitoring, no DevOps degree required.

Your app isn't slow, your queries are. Here's how to find and fix them using AppSignal.
AppSignal provides insights for Ruby, Rails, Elixir, Phoenix, Node.js, Express and many other frameworks and libraries. We are located in beautiful Amsterdam. We love stroopwafels. If you do too, let us know. We might send you some!
