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Playground demo key · api.reefapi.com
post/lei/v1/relationships2 credits
One LEI → Level-2 corporate hierarchy: direct & ultimate parent (entity OR the entity's declared reporting-exception with reason+meaning OR no_data), children list + total counts. detail=true adds the auditable relationship provenance.
Working example
Parameters
request preview
curl -X POST https://api.reefapi.com/lei/v1/relationships \
-H "x-api-key: $REEF_KEY" \
-H "content-type: application/json" \
-d '{"lei":"5493006MHB84DD0ZWV18"}'Hit Send to run this endpoint live.