Understand the web system. Build what comes next.
When documentation stops short of how a web application actually works, we trace the behaviour from the browser down to the protocol and build from what we can verify.
When we can help
For teams integrating with undocumented web systems, diagnosing a broken automation flow, or reconstructing the requests behind an application.
Request and protocol analysis
Map the sequence of requests, session state and dependencies that make a web workflow function. Distinguish what the client sends from what the server actually requires.
Browser JavaScript analysis
Trace client-side logic and obfuscated code to understand request construction and runtime behaviour. Investigate anti-bot mechanisms where they affect the agreed workflow.
Undocumented web APIs
Reconstruct endpoints, payloads and state transitions from observed behaviour. Validate the flow across representative inputs and failure cases.
Working implementation
Turn the findings into a client, backend integration or automation component. Scope the code, technical notes and deployment needs around what your team will operate.
From first look to handoff
- 01
Define the behaviour
Show us the web application, the workflow you need and where the existing approach fails. Agree on a concrete result to investigate.
- 02
Trace and test
Inspect browser execution and network exchanges. Use controlled comparisons to separate verified behaviour from assumptions.
- 03
Reconstruct the flow
Implement the required requests and state handling, then compare the result with the observed application behaviour.
- 04
Deliver the integration
Connect the implementation to your system and document relevant constraints. Agree on how changes in the upstream application will be handled.
Inside the work
Technical writing by the engineers behind status403.
Reverse Engineering as a Service: What It Is, When You Need It, and How It's Done
What a reverse engineering software house actually does, when it's worth hiring one, and the method we use to turn a closed system into something you can automate.
Reverse Engineering Anti-Bot JavaScript: Deobfuscation and VM Analysis
A perfect TLS fingerprint gets you past byte one. The next wall is a JavaScript challenge — obfuscated, VM-based, collecting signals. Here's how those scripts actually work and how you reverse them.
Reverse Engineering a Mobile App's Private API
The end-to-end method for recovering a mobile app's private API: intercepting TLS traffic, defeating certificate pinning, and reconstructing signed requests you can replay from your own code.
Reverse Engineering CyberSource AntiFraud based on PokemonCenter example
Tracing CyberSource Flex Microform through the PokemonCenter checkout: capture-context JWTs, encrypted card payloads, and the boundary between payment tokenization and fraud detection.
If the end goal is ongoing data collection, our web scraping service covers orchestration, data delivery and operating the pipeline. Web Scraping & Automation
Show us the flow you need to understand.
Book a free 30-minute call. We'll discuss your project, assess feasibility, and outline a clear path forward.
We’ll email you a link to choose a time.