Free API lets developers verify Polish company VAT status and bank accounts in code

·1 views

A developer has released skanfirmy.pl, a free REST API that consolidates Polish business verification data from four government sources: the Ministry of Finance, the KRS court register, GUS statistics office, and the EU VIES service. The tool allows developers to check a company's VAT status, confirm bank accounts against the official government white list, and validate EU VAT numbers via simple HTTP GET requests returning JSON. A Python code example is provided, with a note that VAT status strings are returned in Polish and must be compared in their original form to avoid silent logic errors. The API also includes an MCP server with nine tools for AI agent integration, supporting JSON-RPC 2.0 over POST with no API key required. A monitoring endpoint is available that performs daily diffs and delivers HMAC-signed webhook alerts when a company's VAT status or white-list accounts change.

Read the full story at DEV Community

This is an AI-generated summary. ShortSingh links to the original source for the complete article.

Discussion (0)

Developer Breaks Free From Tutorial Loop by Committing to Building Projects

A self-taught developer shares how they fell into a cycle of endlessly consuming tutorials and courses without actually building anything meaningful. The pattern felt productive but left them unable to work independently from a blank editor when real projects demanded it. After stepping away from coding and returning with a fresh perspective, they completed a Frontend Mentor Testimonials Grid challenge as a deliberate reset point. The experience reinforced that practical building exposes problems no tutorial can fully prepare a developer for. They now advocate starting projects first and learning along the way, rather than waiting to feel fully ready before writing a line of code.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

One Build Script Publishes a Game Ontology as HTML, Graph, Search, and AI Tools

A developer behind 'The Genome of Games' has built a single Node.js script that publishes 1,180 records across four distinct surfaces — static HTML pages, an interactive graph, a search index, and a Model Context Protocol (MCP) server — in under half a second with no npm dependencies. The knowledge base covers 168 game mechanics, 618 games, and 394 companies spanning 1962 to 2025, sourced from six hand-edited JSON files totalling around 1.3 MB. The build expands that source data 12.7× into over 16 MB of generated output, all of which can be deleted and fully regenerated on the next run. A key architectural decision was to have the MCP server statically import a pre-built index rather than query a live API, ensuring that AI agents and web crawlers always derive answers from the same single source of truth. The approach is presented as a reusable pattern for any structured knowledge base that must serve both search engines and AI models consistently.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

Developer Builds 30ms Web Scraper API Optimised for AI Agent Frameworks

A developer has released Smart Scraper M2M, a lightweight web scraping API designed to address performance bottlenecks in AI agent frameworks such as CrewAI and LangChain. The tool returns clean, structured JSON in approximately 30 milliseconds by stripping out irrelevant HTML and CSS before data reaches a language model. This approach aims to reduce context window bloat and lower LLM token costs in machine-to-machine workflows. The project is open source and available on GitHub, where the developer is actively seeking community feedback and contributions.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

How to Build a Rate Limiter: Design Principles and Common Pitfalls Explained

Developer Maneshwar, creator of the open-source AI code review tool git-lrc, has published a technical guide on designing production-ready rate limiters. A rate limiter controls how many requests a client can make within a set time window, protecting systems from overload and preventing any single user from consuming disproportionate resources. The guide outlines key requirements including configurable per-user limits, honest HTTP 429 rejections with informative headers, and sub-3ms latency at P95. It walks through the pitfalls of naive approaches such as in-database counters and per-server in-memory storage, both of which break down under real-world, multi-server conditions. Redis is recommended as the shared, memory-fast backbone for counters, using atomic operations and automatic key expiry to keep limits consistent across all servers.

0 comments Read more at DEV Community