Mohamed ElgoharySoftware & Product Engineer
العربية

Local-First API Testing & QA Automation

PostSync Pro

I'm building PostSync Pro, an open-source desktop tool in beta for API testing and QA automation. It imports Postman and OpenAPI definitions, maps coverage, and runs fuzz tests, mock servers and chained workflows.

View source
API workbench with request editing and analysis
My role
Creator and engineer
Work type
Independent product
Current state
Beta
Year
2026

The product

PostSync Pro is a local-first API testing and synchronization toolkit built with Kotlin and Compose Desktop. The implemented workbench sends REST requests, manages encrypted named environments, saves redacted requests, runs bounded assertions, validates responses against OpenAPI and replays a redacted history.

The broader toolkit covers Postman/OpenAPI merge, specification validation, fuzz testing, mock servers, test chains, coverage maps and breaking-change detection. Screens that still use simulated data are marked as previews.

Key decisions

Problem, decision, trade-off, result.

  1. Problem

    API definitions drift between Postman and OpenAPI, while edge-case coverage still takes repetitive manual work.

  2. Decision

    A local-first Kotlin/Compose Desktop toolkit: specs are merged and validated on the tester's machine, secrets are encrypted, and persisted requests and history are redacted before they reach disk.

  3. Trade-off

    Generating many tests can create noise, unsafe requests or false confidence, so assertions stay bounded and screens that still use simulated data are labelled as previews.

  4. Result

    Published as open source on GitHub, in beta.

Capabilities

What’s in the build.

Toolchain

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Need a release you can trust?

I plan and run test scopes across mobile, web and APIs, and prepare store releases.

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