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Clobbr

Local-first API load testing for developers

Pricing Model

Free CLI, Lifetime license

Categories

api
load testing
developer tools
performance testing
graphql
rest api
cli
|All categories
Clobbr - Easy API endpoint load testing without breaking the bank | Product HuntClobbr - Easy API endpoint load testing without breaking the bank | Product Hunt

Table of contents

What is Clobbr?

Clobbr is an API load testing tool for developers, available as native macOS and Windows apps plus a CLI. Point it at any REST, GraphQL, or cloud-function endpoint, choose a verb, and fire off thousands of parallel or sequential requests in seconds. Instead of wrangling spreadsheets, you get interactive charts and the percentile stats that actually matter—p50, p95, p99—along with mean, min, max, and standard deviation for every run. It's local-first by design: no account, no telemetry, and no cloud sync. Every request body, response, and run lives on your own machine.

Key Features

  • Requests to any API, at any scale: Supports REST, GraphQL, and cloud functions with every HTTP verb, including PATCH and DELETE, firing thousands of requests with a click.
  • Percentiles at a glance: Surfaces p50, p95, p99 alongside mean, min, max, and standard deviation for each run, and tracks how those numbers drift over time.
  • Flexible run configuration: Set iteration counts, toggle sequential or parallel execution, and configure timeouts with sensible defaults and depth when you need it.
  • Built-in JSON editor: Autocomplete, validation, and syntax highlighting flag bad payloads before you run a single request.
  • Static or scripted headers: Use plain key-value headers for auth tokens and trace IDs, or write small scripts for tokens that need to rotate between runs.
  • Privacy-safe sharing: Export results as JSON, CSV, or YAML with sensitive headers and payload fields stripped by default.
  • Automatic GraphQL detection: Drop in a GraphQL payload and Clobbr splits stats per operation automatically.
  • CLI parity & CI/CD integration: The @clobbr/cli mirrors the desktop config and gates builds on success-rate or p95/p99 regressions in GitHub Actions, GitLab CI, or CircleCI.

Who Can Benefit from Clobbr

  • Backend & API developers: Those who need to understand how endpoints behave under concurrent load without building custom benchmarking harnesses.
  • GraphQL teams: Developers who want per-operation latency stats automatically split out, instead of treating GraphQL like a generic HTTP call.
  • DevOps & platform engineers: Teams that want to gate pull requests and builds on p95 regressions or success-rate thresholds directly in CI.
  • Privacy-conscious developers: Anyone who can't or won't upload endpoint URLs, headers, and payloads to a third-party cloud.
  • Indie makers & freelancers: Builders who prefer a one-time lifetime license over yet another monthly subscription.

What Makes Clobbr Unique

  • Local-first by default: No account, no telemetry, no cloud sync—every byte stays on your machine next to your project files.
  • GUI, CLI, and CI parity: The same request model works across the desktop app, the CLI, and your pipeline, so you never re-learn anything moving between them.
  • Lifetime license, no subscription: Buy the desktop app once and own it forever; the CLI is free on npm, and the app is bundled in Setapp.
  • Native GraphQL awareness: Auto-detects GraphQL payloads and splits results per operation, which most general-purpose tools don't do.
  • Purpose-built for load testing: Concurrency controls, percentile stats, and browsable run history are the core product, not a secondary mode bolted onto an API IDE.

Pros

  • Clear, actionable metrics: Percentile distributions and trendlines make regressions obvious without exporting to spreadsheets.
  • Everything stays private: Local-first storage means no data leaves your machine, ideal for sensitive endpoints and internal APIs.
  • One-time cost: A lifetime license (plus a free CLI) avoids the recurring per-seat fees common to other load-testing tools.
  • Cross-platform with CLI parity: Native macOS and Windows apps plus a CLI that shares the same configuration for seamless CI use.
  • GraphQL done right: Automatic detection and per-operation stats save manual setup for GraphQL-heavy stacks.
  • Quality-of-life depth: Script testing, advanced failure debugging, dense large-screen mode, and toggleable chart types reduce friction.

Cons

  • Not a full API IDE: Clobbr is single-purpose; if you also want request collections and API exploration, you'll still need a separate tool like Postman.
  • Local resources cap throughput: Because tests run on your machine, extreme concurrency is limited by your local hardware rather than a distributed cloud fleet.
  • Desktop apps are paid: While the CLI is free, the macOS and Windows apps require a one-time purchase (or a Setapp subscription).

Summary

Clobbr is a focused, local-first load tester that gets you from an endpoint to meaningful percentile stats in under a minute. It runs as native macOS and Windows apps plus a free CLI, so you can click together a test, then run the exact same config headless in CI to gate builds on p95 regressions. With automatic GraphQL detection, privacy-safe sharing, and a lifetime license instead of a subscription, it's a pragmatic choice for developers who want to hammer their APIs and read the numbers without sending anything to the cloud.