API Testing

API request workflows, mock servers, contract and schema drift detection, response validation, and reliable local development with Orbittest Client.

A CI pipeline where the API test stage runs 214 checks in 96 seconds, finds one schema drift failure on GET /invoices, and blocks the deploy stage before the breaking change reaches production

API Testing August 5, 2026 16 min read

API Testing Automation: Why Every Modern Team Needs It

API testing automation catches bugs before users do. Learn what it is, why manual testing falls short, which tools teams actually use, what to assert, the real maintenance costs, and where AI fits in 2026.

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Orbittest Client's Beacon dashboard showing request count, throughput, error rate, p95 latency, Apdex score, total data size, a list of exposed secrets found in traffic, and a throughput-and-errors chart

API Testing July 21, 2026 8 min read

Beacon and Pulsar Explained: Orbittest Client's Traffic Monitor and API Uptime Checker

What Beacon and Pulsar do inside Orbittest Client — a simple guide to watching live API traffic, catching leaked secrets, and checking API uptime over time, with real screenshots and plain-English explanations.

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Orbittest Client main window — collections sidebar, request builder with Params/Headers/Auth/Body/Pre-Run/Post-Run tabs, response panel with Tests, Schema, and Drift Radar, code generation with import/export tools, the Ghost Mock Server latency controls, and the integrated terminal

API Testing July 16, 2026 8 min read

Orbittest Client — Local-First API Client & Testing Tool

A local-first desktop API client with built-in traffic capture, API monitors, a mock server, and Git sync — no account, no cloud. Your data stays on your machine.

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A test run with 20 passing and 16 deliberately failing tests, each failure mapped one-to-one onto a documented bug in a bug report

API Testing July 14, 2026 9 min read

API Tests That Fail on Purpose: A REST Assured Framework Design

Designing a parallel-safe REST Assured + TestNG framework: immutable specs, ThreadLocal reporting, an HTTP 418 mystery, and why 16 tests fail on purpose.

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Comparison of the HTTP methods GET, POST, and QUERY — QUERY is the only one that combines a request body with safe, idempotent, cacheable semantics

API Testing July 10, 2026 10 min read

HTTP QUERY Method Explained: A Safe GET With a Body (RFC 10008)

The HTTP QUERY method (RFC 10008) is safe, idempotent, and cacheable like GET, but carries a body like POST. What the spec says, and how to test QUERY endpoints.

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Diagram showing a JSON API response validated against a JSON Schema — matching fields pass, a field with the wrong type is flagged as invalid

API Testing July 8, 2026 9 min read

Schema Validation Explained: JSON Schema for APIs

What is schema validation and why does it matter for APIs? A guide to JSON Schema, OpenAPI validation, contract drift, and the tools that catch schema bugs before production.

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Diagram explaining what an API is: an app sends a request to an API, which passes it to a server and returns a response — like a waiter carrying orders between a customer and a kitchen

API Testing July 7, 2026 9 min read

What Is an API? A Beginner's Guide With Examples

What is an API? A plain-English beginner's guide with a restaurant analogy, real JSONPlaceholder examples, URL basics, and free tools to try it yourself.

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Orbittest Client running the Ghost Mock Server, replaying recorded API responses from a local mock endpoint on port 4090

API Testing July 7, 2026 13 min read

Ghost Mock Server: Zero-Config Local API Mocking

Turn recorded API responses into a zero-config local mock server — dynamic :id routes, realistic latency, and a live dashboard. Record once, mock instantly.

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A number line showing min-1 and max+1 marked invalid (red) and min, max and the range between marked valid (green) — boundary value analysis

API Testing June 29, 2026 8 min read

Boundary Value Analysis & Equivalence Partitioning, Generated

A practical guide to boundary value analysis and equivalence partitioning — what they are, worked examples, and a free tool that generates valid and invalid edge-case test cases for you.

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JSON to Java and back — a JSON object on the left converting to a Java class on the right with a two-way arrow

API Testing June 29, 2026 7 min read

JSON to Java POJO (and Back): The Converter Guide

Convert JSON to Java POJOs with Lombok, records or Jackson — and turn JPA entities back into JSON or TypeScript. A practical guide to type inference, relationships, and the free tools that automate both directions.

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Orbittest Client v1.2.0 Performance monitor showing a live CPU utilization chart, logical processors, base speed, and app uptime

API Testing June 26, 2026 14 min read

Orbittest Client v1.2.0: Live Monitoring for API Testing

Orbittest Client v1.2.0 adds a live Performance monitor, Pulsar scheduled monitors, and the Beacon capturing proxy — a problems-and-solutions guide to monitoring API health, latency, and exposed secrets without leaving the app.

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The API tester's toolkit — JSON formatter, JWT debugger, timestamp converter, JSON diff, regex tester, Base64, encrypt/decrypt, cURL converter, XML to JSON and JSON path finder

API Testing June 24, 2026 11 min read

Free API Testing Tools Every Tester Should Bookmark

A practical roundup of free, browser-based API testing tools — JSON formatter, JWT debugger, timestamp converter, JSON diff, regex tester and more — that cut everyday debugging time.

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A baseline API response schema compared against the current one, with a removed field flagged as contract drift

API Testing June 23, 2026 13 min read

Contract Testing Explained: Stop API Breakages

Learn what API contract testing is, how it differs from integration testing, and how to catch breaking schema changes before they cause production incidents.

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The five HTTP status code categories — 1xx, 2xx, 3xx, 4xx, 5xx — with example responses like 200 OK, 404 Not Found, and 500 Error

API Testing June 22, 2026 14 min read

HTTP Status Codes Explained (With Real Examples)

A complete, practical guide to HTTP status codes — 2xx, 3xx, 4xx, and 5xx — with real examples, testing scenarios, and the mistakes APIs make most often.

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