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Bloomberg L.P. (FIGI Registration Authority) · Market & fundamentals data

Free API and web tool from Bloomberg for mapping tickers, ISINs, CUSIPs and other identifiers to public-domain FIGI instrument identifiers, with search and filter endpoints

ProprietaryFreeNov 2, 2026

ORCID

ORCID, Inc. · Research dissemination

Non-profit registry of persistent researcher identifiers (ORCID iDs) with user-controlled records, Public and Member APIs, OAuth sign-in and an annual CC0 public data file

Open sourceFreeEnterpriseNov 2, 2026

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