Question 1

What does Finnhub do?

Accepted Answer

Finnhub is a financial market data API providing real-time and historical stock quotes, company fundamentals, earnings data, and alternative datasets (insider transactions, social sentiment, ESG scores) across global exchanges. It notably includes coverage of the Nigerian Exchange (NGX) alongside major US, European, and Asian markets, making it one of the few widely-used international market data providers with any direct Nigerian equities coverage.

The core REST API exposes endpoints for real-time quotes, historical OHLCV candles, company profiles, financial statements (income statement, balance sheet, cash flow), analyst estimates, and earnings calendars. A WebSocket feed streams live trade-level price updates for supported exchanges, useful for building live tickers or algorithmic trading signals. Authentication uses a simple API key passed as a query parameter or header.

The free tier allows 60 API calls per minute with access to a meaningful subset of endpoints (real-time US quotes, basic fundamentals), which is enough for prototyping a portfolio tracker or market dashboard. Paid plans unlock full historical depth, additional exchanges including NGX, and higher rate limits. For Nigerian fintech and investment platforms building portfolio trackers, robo-advisors, or market research tools, Finnhub is a practical way to get both global and NGX-adjacent market data from a single integration rather than stitching together multiple region-specific providers.

Question 2

How much does Finnhub cost?

Accepted Answer

Finnhub is free to start, with paid tiers for higher usage (freemium). 250 API calls/minute free tier

Question 3

How do I authenticate with the Finnhub API?

Accepted Answer

API Key

Question 4

Is there a rate limit on Finnhub?

Accepted Answer

250 calls/minute (free)

Question 5

Does Finnhub offer a sandbox or test mode?

Accepted Answer

Yes — Finnhub provides a sandbox or test environment so you can integrate and test before going live.

Question 6

What is Finnhub best suited for?

Accepted Answer

Fintech apps and trading platforms needing global + NGX market data

Question 7

Is there anything else I should know before integrating Finnhub?

Accepted Answer

Free tier: 60 calls/min; paid tiers required for full historical depth and premium datasets

Question 8

Where can I find Finnhub's documentation?

Accepted Answer

The official API documentation is at https://finnhub.io/docs/api. The provider's website is https://finnhub.io/.

Question 9

Does Finnhub support Nigerian developers?

Accepted Answer

Yes — Finnhub explicitly supports Nigerian developers/use cases.

Finnhub

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