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A web page performance tester with support for Prometheus, InfluxDB, Graphite, Datadog, and Riemann

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Crabby, open source web+API synthetic monitoring

Name: Crabby, open source web+API synthetic monitoring
Availability: InStock
Author: chrissnell

by chrissnell·Mar 15, 2026·1 point·0 comments

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AI Analysis

●●SolidSolve My ProblemNiche Gem

Open-source synthetic monitoring with multi-backend support and API workflow chaining.

Strengths

•Supports five different metric backends simultaneously without extra glue code.
•API probe handles multi-step auth workflows with template-based response chaining.
•Includes Helm chart for immediate Kubernetes deployment without custom manifests.

Weaknesses

•Synthetic monitoring is a crowded market with established SaaS and open-source alternatives.
•Browser probe requires headless Chrome, adding significant resource overhead to deployments.

Post Description

Crabby monitors your websites and APIs and reports metrics to a variety of storage backends (Prometheus, Datadog, Splunk, InfluxDB, etc).

It gives you insight into timings like TTFB, DNS resolution, TLS negotiation, server processing, and content delivery. It also supports chromedp for automated gathering of browser metrics like page render timings.

It's very easy to configure and includes a Helm chart for deployment into K8S.