Comparing Financial Market Data APIs for Quantitative Research
Summary
This guide surveys data services that researchers and developers might use for market quotes and historical bars. It discusses Google Finance, Finnhub, iTick, and Bloomberg, describing their stated coverage across assets such as stocks, currencies, indices, and, for some providers, crypto or derivatives. It contrasts free or limited access with paid features and notes that streaming interfaces may require familiarity with technical data handling. Short examples show requests for a forex price bar and a current quote through one provider.
The document is an introductory catalog, not an independent comparison or data-quality study. Its claims about coverage, timeliness, accuracy, pricing, and suitability are presented without benchmarks or verification, and service terms can change. Free tiers may impose call or data limits, while commercial services can carry substantial costs. Researchers should check current availability, licensing, latency, historical depth, and data adjustments before relying on an API for research or live trading. The examples illustrate access mechanics but do not assess whether the returned data is suitable for a particular strategy.
Key ideas
- The guide compares several market data services and their stated asset coverage.
- It distinguishes limited free access from paid features and broader service offerings.
- Streaming or API use can require programming and financial-data handling skills.
- The examples demonstrate requests for forex bar data and a current quote.
- Provider claims are not independently benchmarked, so availability, licensing, and data quality require verification.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.