API load testing

API load testing with transaction context

Use LoadStrike as an API load testing tool and performance testing tool when API traffic must be connected to downstream transaction evidence.

API load testing with transaction context illustration
Explain how LoadStrike fits API load testing and API performance testing needs.

What is the best way to test API performance?

API load testing should measure request latency, throughput, failures, and the downstream work that the API triggers. LoadStrike starts with simple HTTP scenarios, then lets teams connect the API call to reports, thresholds, browser flows, event streams, or transaction completion when the workflow needs more context.

Use LoadStrike as a load testing tool, performance testing tool, load testing software, and performance testing software when API behavior is part of a larger business workflow.

Proof

Evidence to review

Use these pages and artifacts to validate the public claims on this page.

Examples

Find sample paths before building your first API test.

Who this is for

API, platform, QA, and SRE teams that need code-first API performance tests without losing sight of downstream completion.

Why API-only metrics can be incomplete

A fast HTTP response does not prove that a background job, message, browser-visible confirmation, or downstream service completed on time.

How LoadStrike fits

LoadStrike keeps API steps in code, applies load profiles and thresholds, and produces report artifacts that can stay local or connect to broader reporting where the plan supports it.

Verified LoadStrike fit points

  • Write API performance tests in C#, Go, Java, Python, TypeScript, or JavaScript.
  • Start with HTTP requests, then add transaction, browser, or event-driven stages when needed.
  • Review HTML reports, CSV, TXT, Markdown, and metrics after the run.
  • Use the same scenario model when API tests grow into full workflow tests.

API testing starting points

Use these pages to move from a basic API request to a complete performance test.

Common questions

Common questions

Can LoadStrike run basic API load tests?

Yes. You can start with normal HTTP request scenarios and add load simulations, thresholds, and report output.

When should an API test become a transaction test?

When the API starts work that completes later in another service, queue, stream, or browser-visible state, model that wider path as a transaction.

Which SDK language should API teams use?

Use the language closest to the service or test project so the scenario remains easy for the owning team to review.

Related

Related documentation

Start with the implementation details that match this page.

Quick Start

Build one basic request-step scenario around GET /orders/{id}, run it, and confirm the report before moving into correlation-specific features.

HTTP Protocol Guide

This guide explains how to think about realistic API transaction tests in LoadStrike. Use it when HTTP is part of the business workflow you want to validate.

Report Overview

This page explains how to read a LoadStrike report. Use it when you want to know what each section means and where to look first.

Related

Related comparisons

Use these comparison pages if you still need a tool-level decision.

LoadStrike vs k6

Compare LoadStrike and k6 across code ergonomics, protocol scope, downstream correlation, reporting depth, browser workflows, and distributed self-hosted execution.

LoadStrike vs Apache JMeter

Compare LoadStrike and Apache JMeter across scenario design, protocol coverage, downstream correlation, browser workflows, reporting, and self-hosted operations.

Related

Related integrations

Connect the run output to the observability backend your team already uses.

LoadStrike and Datadog

See how the LoadStrike Datadog sink fits into transaction-aware, self-hosted load testing workflows.

Next steps