Gemini API vs Kraken API

Two free Cryptocurrency APIs compared on access, reliability and developer ratings, using data from our daily health checks.

The verdict

Choose Gemini API if you want to start without an API key.
Choose Kraken API for its data: Cryptocurrencies Exchange. A free cryptocurrency API by kraken.com.

	Gemini API	Kraken API
What it does	Build across Spot, Margin, Perpetuals, and Prediction Markets with Gemini APIs, guides, and developer tools.	Cryptocurrencies Exchange. A free cryptocurrency API by kraken.com.
Provider	Gemini Developer Platform	kraken.com
API key	Not needed	Required
HTTPS	Yes	Yes
CORS (browser calls)	Unknown	Unknown
Status today	Online · 1950 ms	Last check failed
Uptime (30 days)	Up	Down
Developer rating	Not rated yet	Not rated yet
Price	Free / free tier	Free / free tier

Build across Spot, Margin, Perpetuals, and Prediction Markets with Gemini APIs, guides, and developer tools.

Strengths

Cryptocurrencies Exchange. A free cryptocurrency API by kraken.com.

Strengths

Prototyping or a tutorial? Pick the one that needs no API key.
Calling from a web page? You need CORS. Otherwise route requests through your own server or a serverless function.
Going to production? Favour HTTPS, a strong uptime record and a provider with clear rate limits and terms. Check each API's docs before you commit.
Still unsure? Both are free to try: send one request to each and compare the data you get back.

Kraken API requires an API key; Gemini API doesn't, so Gemini API is quicker to try.