National Court Register API – Entity Search (KRS WP API)

National Court Register (KRS) API

Get access to a comprehensive, daily-updated database containing complete and current extracts for all entities listed in the National Court Register’s business and association registers.

KRS API from MGBI

Our API for the KRS Entity Search allows you to retrieve information about individual entities as well as synchronize a complete copy of the registry on a daily basis.

The transcripts are available in JSON format, which allows for further processing of the data they contain, as well as in their original PDF format.

We provide complete personal information for all individuals listed in the National Court Register (first names, last names, PESEL numbers) as well as a list of all relationships linking a given entity to other entities and individuals (e.g., partners, board members).

The KRS API also provides a data model containing the content of KRS entries generated based on full copies.

Every day by 10 a.m., we make all of the previous day’s posts available in JSON, XML, and HTML formats, ready for both automated processing and easy viewing by users.

How to leverage the KRS API

Use the KRS Entity Search API to automate your company’s KYB, risk assessment, and receivables management processes.

Banks and financial institutions use the KRS API to automatically verify customers and business partners during the onboarding process—instead of manually requesting copies of records, the system retrieves up-to-date data directly when a loan application is submitted or an account is opened.

Debt collection agencies and accounts receivable departments integrate APIs with CRM systems to monitor changes in debtors’ legal status in real time—new entries regarding liquidation or changes in management appear in the system automatically.

Law firms and AML departments use the full personal data contained in the copies—first names, last names, and Social Security numbers—to unambiguously identify individuals associated with the entity under review and verify its ownership structure.

Purchasing departments at large companies integrate the KRS API with their ERP systems, ensuring that supplier data is always up to date without the need to manually check the registry before each transaction.

For more information, please refer to our API documentation.

What is the KRS Entity Search Tool?

The KRS Entity Search Engine is a tool that allows users to search the National Court Register (KRS), the official database maintained by the Ministry of Justice in Poland.

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It allows you to find information about companies, foundations, associations, and other entities required to be entered in the registry.

KRS Entity Search

The information available in the KRS Entity Search Engine comes directly from the National Court Register (KRS), which is maintained by the Ministry of Justice. This data is collected and updated primarily based on entries made by the registry courts.

Entities required to register must file their applications with the appropriate registry courts (commercial divisions of district courts).

What data can you find using our KRS API?

These applications contain detailed information, such as the company name, the composition of the management board, the amount of share capital, and the address of the registered office. Once the court has approved the application, this information is submitted to the National Court Register (KRS).

The registry is also updated based on reports submitted by the entities themselves. Any change in data—such as a change in management, address, or capital—must be reported to the registry court, which then updates the system accordingly.

Frequently Asked Questions

Does the National Court Register (KRS) have an open API?

Yes – the Ministry of Justice provides a public API for the KRS Entity Search Engine, which can be used free of charge. However, it has significant limitations: query limits, technical downtime, and no guarantee of operational stability, which rules out its use in processes requiring continuity and scalability. The KRS API from MGBI solves these problems—we provide our own, daily-updated copy of the registry with no query limits, in a JSON format ready for integration, including full personal data from the records and technical support during implementation.

How do I retrieve financial data from the KRS API?

Company financial data—financial statements, balance sheets, income statements, and auditors’ opinions—are not part of the KRS Entity Search Engine, but rather a separate module: the Financial Documents Repository. Through the Public Registers API from MGBI, both modules are available from a single provider. The Financial Documents Repository API enables bulk downloading of reports in JSON or PDF format, with the ability to search by KRS number or NIP and automatic synchronization of new documents submitted by companies.

How do I check organizations in the National Court Register (KRS)?

The KRS number is the primary identifier for entities registered in the Business Register and the Register of Associations. The KRS API from MGBI allows you to query data for a specific entity directly using this number—in response, you receive a current or full extract in JSON or PDF format, containing data on the management board, shareholders, share capital, history of changes, and complete personal data of associated individuals. When performing bulk verification of multiple entities simultaneously, it is also possible to synchronize a full copy of the registry, ensuring that changes in an entity’s legal status are automatically updated in your systems without the need to manually check each entry individually.

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Public Registers API

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Public Registers API