tengu_v3_reference_crosswalk

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

IDENTITY CROSSWALK for one symbol — every identifier the security and its issuer carry, which rung matched, and how confident that match is. Returns SECURITY-grain identifiers (CUSIP9, CUSIP8, ISIN, SEDOL, ticker, estimate-vendor ticker) kept deliberately SEPARATE from the ISSUER-grain keys (gvkey, CUSIP6, regulator filer number, entity id), because those identify a company and not a share line; plus the issuer's other listed securities, the dated timeline of every identifier this security has ever been bound to, and the bridge into the private-company graph with that link's confidence grade. Call it to join two data sets that key on different identifiers, to translate a CUSIP-keyed holdings file into tickers, or to find out what a symbol used to be. as_of=YYYY-MM-DD returns the identifiers that were IN FORCE on that date, not today's — FB resolves today to an ETF and Meta's 2012-02-01→2022-06-08 hold on the string comes back as a dated prior binding, never as the answer. A symbol shared by more than one current security is REFUSED with its candidate list rather than guessed; pass prefer_country to choose. Coverage is a number in every response: what THIS answer contains, and the corpus census (77,313 securities / 58,179 issuers / 969,333 identifier bindings / 26,189 issuers linked to the private graph, live-measured 2026-08-02). Identifier-history depth is uneven by construction — 38,850 of 77,313 securities carry a prior ticker — and every source block states its own as-of, its age in days and whether that age is past its expected refresh cadence.