The playground
Try any of 1462 endpoints — live.
Pick an endpoint, load a working example, tweak the params, and send — no signup to try. Results render the way the data deserves; raw JSON, headers & code are one tab away.
Playground demo key · api.reefapi.com
post/lei/v1/lookup1 credit
One LEI → the full verified legal-entity record (Level-1 who-is-who): legal name, addresses, jurisdiction, legal form, registration status + honesty note, authority ids, renewal dates, BIC/ISIN-adjacent identifiers.
Working example
Parameters
request preview
curl -X POST https://api.reefapi.com/lei/v1/lookup \
-H "x-api-key: $REEF_KEY" \
-H "content-type: application/json" \
-d '{"lei":"HWUPKR0MPOU8FGXBT394"}'Hit Send to run this endpoint live.