NASDAQ Data Link (formerly Quandl)
Financial and economic dataset API (rebranded from Quandl to NASDAQ Data Link) providing access to hundreds of curated datasets including commodities, macro indicators, and alternative financial data.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Financial data API (now Nasdaq Data Link). API key auth. Financial market data — not PII. Premium datasets have license restrictions. Key rotation recommended.
⚡ Reliability
Best When
You need curated, institutional-quality economic and alternative datasets for research, backtesting, or macro analysis — particularly the free Quandl open datasets or FRED-equivalent data.
Avoid When
You need real-time stock prices or free coverage of individual company fundamentals at scale.
Use Cases
- • Fetching historical economic time series (GDP, inflation, unemployment) for macro analysis agents
- • Accessing commodity price histories for energy, metals, and agriculture datasets
- • Premium alternative data (sentiment, corporate events, supply chain signals) for quant strategies
- • Backtesting historical market data across multiple asset classes
- • Economic indicator monitoring for policy or business intelligence agents
Not For
- • Real-time stock price feeds (latency is not suitable for live trading)
- • Individual retail stock fundamentals at scale (use Finnhub or Alpha Vantage)
- • Options or derivatives chains
- • Free access at scale — many valuable datasets require premium subscriptions
Interface
Authentication
Single API key. Free account gives access to free datasets; premium datasets require separate subscription. Key can be passed as header or query parameter.
Pricing
The free open datasets (FRED, commodities, etc.) are genuinely useful. Premium alternative data (e.g., short interest, corporate satellite data) is priced per dataset and can be expensive.
Agent Metadata
Known Gotchas
- ⚠ Rebranding from Quandl to NASDAQ Data Link means many tutorials reference old quandl.com URLs and the legacy Python library
- ⚠ Free tier daily limit (50 requests) is restrictive for agents making frequent lookups
- ⚠ Dataset availability varies — some historical Quandl datasets have been retired or moved
- ⚠ Premium dataset access requires separate agreement with data providers — not just an API plan upgrade
- ⚠ Python SDK still named 'quandl' for legacy compatibility — import quandl, not nasdaq_data_link
- ⚠ Date format and column names vary significantly across datasets — no standardized schema
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for NASDAQ Data Link (formerly Quandl).
Scores are editorial opinions as of 2026-03-06.