LEI Data


In September 2017, the Global Legal Entity Identifier Foundation (GLEIF) launched its Legal Entity Identifier (LEI) ‘Look-up’ application programming interface (API). This provides developers with the opportunity to directly access the complete LEI data pool in real time and to perform on-demand checks for changes to specific LEI records in a convenient, easy-to-read format. The application responds to market needs identified during a beta test, carried out in 2017, which involved multiple LEI stakeholders including financial institutions, regulators, fintech companies and analysts seeking to include LEI data in automated processes.


The API (Request/Response Web Interface) allows organizations to set up fast, customized and automated access to the Global LEI Index, which contains historical and current LEI records including related reference data in one authoritative, central repository. The data provides the information on a legal entity identifiable with an LEI. The publicly available LEI data pool is the only global online source that offers open, standardized and high quality legal entity reference data.

The GLEIF LEI Look-up API makes it possible to easily find up to 200 LEI records included in the Global LEI Index with one request. Consequently, data users are now able to speedily retrieve information on specific LEIs with the API instead of having to download the GLEIF Concatenated Files or to manually search for individual records with the LEI search tool. The integration of LEI look-up functionality into in-house systems using the API supports a wide range of processes including, for example:

  • Know-your-customer (KYC): Financial institutions and other market participants can streamline work flows by rapidly validating information against a customized list of LEI records.
  • Client onboarding: Firms may consider deepening the use of the LEI within their client onboarding infrastructures so as to benefit from up-to-date reference data available within the Global LEI Index.
  • Compliance: Public authorities are able to efficiently verify whether legal entities meet legal requirements related to the use of the LEI in regulatory reporting, e.g. if the entity’s LEI has been duly renewed.

The GLEIF LEI Look-up API can easily be integrated into internal systems based on the widely supported JSON data format. Use of the API is free of charge and does not require registration.

The API is transitioning between version 1.0 and version 2.0. Both versions are available, together with their adjacent documentation, here.