FactSet API
FactSet publishes a full REST API catalog at developer.factset.com with OAuth 2.0, OpenAPI specs, SDKs in six languages, and Postman collections. Signup is self-serve through the developer portal, though some content sets are entitlement-gated. Rate limits are published per API.
Frequently asked questions
FactSet scores A on the API Report Card. FactSet publishes a full REST API catalog at developer.factset.com with OAuth 2.0, OpenAPI specs, SDKs in six languages, and Postman collections. Signup is self-serve through the developer portal, though some content sets are entitlement-gated. Rate limits are published per API.
FactSet has a workable official integration path. Most engineering teams can build against it directly. Open API: self-serve, documented, with SDKs
FactSet Research Systems Inc. (NYSE: FDS) is a Norwalk, Connecticut-headquartered financial data, analytics, and software platform founded in 1978 by Howard Wille and Charles Snyder.
Vertical: Financial Services (institutional financial data, analytics, and workstation infrastructure). Pulling fundamentals, estimates, and prices into Excel / Office for equity research and pitchbooks. Generating pre-formatted bank pitchbook pages from FactSet Mercury / Workstation templates.
Very high inside institutional finance, especially North America buy-side and sell-side. FactSet is consistently named in the top 4 financial data workstations alongside Bloomberg (the dominant terminal), Refinitiv/LSEG Workspace (formerly Eikon), and S&P Capital IQ.
Securities reference data: tickers, CUSIP, ISIN, SEDOL, FactSet permanent IDs, exchange/listing metadata, corporate actions. Equity and fixed-income prices: historical EOD, intraday, splits, dividends, corporate-action-adjusted series.
Founded 1978 in Greenwich, CT (48 years old as of 2026); IPO'd on NYSE in 1996 (FDS).
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.