XAKPC Dev Labs - Indie Software Studio
An independent software studio building Windows apps, Windows 11 widgets, web tools, and developer utilities — run by Pavel Osadchuk, senior .NET engineer with 14+ years shipping production systems.
Small, focused tools built the way I'd want to use them: clean UX, solid engineering, and a bias for self-hosting and simplicity. Also available for custom widget development for SaaS products.
Products
netdiag.dev
2026
Stop writing your own connectivity checks. One Website Connectivity Diagnostics API for DNS, TCP, TLS, and HTTPS health checks.
AnyMCP.io
2025
A catalog of single-file MCP servers for .NET 10 (Preview 4+). Works with any LLM that supports local MCP connections.
AI Token Price Calculator
2025
Calculate and compare token costs across AI providers. Estimate pricing for your LLM API usage.
OpenPost
2025
The free open-source tool for easy, self-hosted email campaigns.
htmx-pal
2024
htmx Code Completion and IntelliSense extension for Visual Studio 2019 and 2022.
AI DEV Assess
2024
AI-powered tool that generates role-specific interview questions and assessment matrixes for evaluating software developers.
CreateHTMLForm
2023
Easily create and customize interactive HTML forms.
CreateOnlineMenu
2023
QR Digital Menu for Restaurants.
Windows Apps
Karve
2026 · $29.99
A native Windows workspace for .http files. Organize requests across repos, run them, and inspect responses without an account or subscription.
Wburn
2026
Usage tracker for AI coding agents. Live limit gauges for Claude Code, Codex, and Gemini CLI in your Windows Widgets.
Witals
2026
Is it throttling, or just slow? Free system monitor widgets that keep CPU temperature, GPU, RAM, and network on the Windows 11 Widgets Board.
Wizible
2026
Stop re-opening the dashboard after every launch. A Plausible Analytics widget for Windows 11 — traffic, goals, and trends in the Widgets Board.
Fizzy WinForms
2025
A Windows Forms app that wraps a Docker-containerized Rails application, providing a native desktop experience for the Fizzy web app.
TextBeam
2025 · $6.99
From Screenshot to Notes in 17 Seconds. Turn screenshots into clean, searchable notes — privately, offline.
API.chat
2025
One Windows app that turns every API key you own into a private, super-chat.
Courses
Enterprise Integration Interview Prep
2026 · $79.99
The job description says SAP, Salesforce and commercetools — you've only ever built .NET services. Six lessons and 230 drill questions in one interactive HTML file.
Widget Guides
Windows Widgets: A Practical Guide
Learn how to build Windows widgets that actually work — the full history and a hands-on build tutorial.
Blog Posts
Building a Powerful MCP Server in .NET
Aug 2025 · .NET / AI
WinUI 3: How to Set Minimum Window Size
Jan 2025 · Desktop
Extending Visual Studio 2022
Sep 2024 · IDE
ASP.NET Forms Validation and HTMX
Jun 2024 · Web
HTMX + .NET
Aug 2023 · Web
Let's Build a Countdown Timer with Blazor
Jun 2022 · Blazor
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