About this API
The LEI (Legal Entity Identifier) is a 20-character global identifier for a legal entity, introduced after the 2008 crisis for financial-market transparency. GLEIF (the Global Legal Entity Identifier Foundation) maintains the central, open registry of every issued LEI — complementary to national company registers (KRS, REGON, INSEE, ARES): it lets you link the same entity across jurisdictions.
Frequently asked questions
Do I need an API key?
No, the API is fully public and free — no registration, no key required. LEI data is published under CC0.
What data does this API return?
Entity data by LEI code — official name, registered address, country, legal form, registration status and relationships (parent/child). Entities can also be searched by name.
Can this API be called directly from a browser?
Yes — the API returns a CORS header allowing calls from any domain, so it works directly from frontend code (hence the live "Try it" button above).
Who runs this API?
GLEIF (the Global Legal Entity Identifier Foundation), an independent non-profit based in Frankfurt. Full documentation is available at gleif.org.