Every API, one clean contract.

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.

{
  "lei": "HWUPKR0MPOU8FGXBT394"
}

Company name → ranked candidate entities with match_confidence for disambiguation (same-name entities across countries/legal-forms). Filters: country, status, jurisdiction, entity_status.

{
  "name": "Apple Inc",
  "country": "US"
}

Type-ahead suggestions for a partial company name (GLEIF autocompletions surface) — each suggestion carries its LEI for direct lookup.

{
  "name": "apple"
}

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.

{
  "lei": "5493006MHB84DD0ZWV18"
}

Identifier mapping: ISIN / BIC / MIC / QCC / S&P-Global-ID → LEI record(s), or reverse LEI → all its ISINs.

{
  "type": "isin",
  "value": "US0378331005"
}

GLEIF reference collections: ISO-20275 legal forms, registration authorities, LEI issuers (LOUs), jurisdictions, countries, regions, field catalog — list or fetch one by code.

{
  "kind": "legal-forms"
}

Up to 50 mixed lookup/search items in one call. Lookups are collapsed into one upstream request per 50 LEIs (GLEIF rate-friendly); searches are spaced.

{
  "items": [
    {
      "type": "lookup",
      "lei": "HWUPKR0MPOU8FGXBT394"
    },
    {
      "type": "search",
      "name": "Deutsche Bank",
      "country": "DE"
    }
  ]
}