tengu_v3_reference_lookup

io.github.Hlobo-dev/tengu-firm · Verify this server

REVERSE IDENTIFIER LOOKUP — give it a CUSIP, ISIN, SEDOL, ticker, estimate-vendor ticker, gvkey, regulator filer number, entity id or private-company-graph id and it returns the security (or, for an ISSUER key, every security under that issuer) plus which rung matched and whether that binding is still current. Exactly one identifier per call. RETIRED identifiers resolve by default — 759,618 of the 969,333 bindings on file are retired, which is precisely why a stale identifier in your own data still lands, and it comes back with the date it was replaced and by what. Issuer keys NEVER nominate one security: an issuer can carry a common line, other share classes and a foreign listing, so all of them are returned and the grain is stated. Use it to turn a CUSIP-keyed custodian file into tickers, to find the ticker behind a regulator filing, or to audit whether an identifier in your own data has gone stale. Rung coverage, measured 2026-08-02: CUSIP9 and CUSIP8 100% of 77,313 securities, ISIN 79.4%, SEDOL 74.2%, regulator filer number 67.8%, estimate-vendor ticker 37.2%.