Open Data — entry 021 of 44
Nasdaq Data Link
Nasdaq Data Link (formerly Quandl) aggregates over 250 financial, economic, and alternative datasets from 500+ sources, with roughly 40 available free and the rest sold as a-la-carte premium subscriptions layered on the same keyed API. Its real data host, data.nasdaq.com, sits behind an Incapsula bot-protection challenge that blocks every automated request before a CORS header could ever be observed, so cors is left unknown rather than guessed.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSUnknownNot documented — test from the browser before relying on it.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSON, CSV, XMLResponses can be requested as JSON or CSV or XML.
GreatAPIs Score
Score67
Authentication15/25API key required
Pricing17/20Freemium tier available
Docs0/20No docs or spec available
Formats15/15Supports 3 response formats
Freshness20/20Verified within 6 months
Embed this badge
<a href="https://greatapis.com/api/nasdaq-data-link/"><img src="https://greatapis.com/badge/nasdaq-data-link.svg" alt="Scored 67 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.
Developer reference
Base URL
https://data.nasdaq.com/api/v3