Finance

What Is the Finance Category?

Finance is one of the most data-rich and API-mature verticals in software. Real-time market feeds, payment processing rails, banking aggregation, and AI-driven financial modelling all rely on robust APIs. This category spans the full financial stack — from the consumer payment flow handled by Stripe to institutional-grade quantitative data used by algorithmic traders — as well as the AI models purpose-built for financial reasoning, fraud detection, and risk assessment.

What Developers and Fintech Teams Build

• Stock screeners and portfolio trackers pulling real-time prices, fundamentals, and analyst ratings
• Crypto dashboards aggregating prices, volumes, and on-chain metrics across 10,000+ assets
• Payment flows accepting cards, wallets, BNPL, and ACH bank transfers with one integration
• Open banking apps that read transaction history and categorise spending across multiple bank accounts
• Algorithmic trading systems backtesting strategies on decades of tick-level market data
• AI credit-scoring models combining traditional bureau data with alternative behavioural signals

Key Finance API Providers

Stripe remains the gold standard for payment processing — its API handles cards, wallets, subscriptions, invoicing, and payouts in 195 countries. Plaid leads open banking in North America, connecting to 12,000+ financial institutions for account and transaction data. Alpha Vantage provides free stock, forex, and crypto data with a 25 API calls/day free tier. CoinGecko is the most comprehensive free crypto data API — 10,000+ coins, exchange data, and NFT metrics with no API key for basic queries. Alpaca enables commission-free brokerage API access for algorithmic trading with paper trading on the free tier.