FinTech startups have leveraged Web APIs to dominate the financial services industry, while traditional institutes are following suit by implementing strategies like Open Banking initiatives to expose their services. To ensure effective use of these APIs, developers need a great developer experience. The study analyzed popular APIs from both Open Banking and FinTech spaces using a Developer Experience checklist endorsed by industry experts. The list of APIs includes Barclays APIs, Nordea Bank, Citi APIs, Deutsche Bank, Stripe, Square, Visa, and CoinAPI. Each API was evaluated based on its publicly available resources, including developer portals, product pages, documentation, and components. Citibank's API program offers 11 APIs with a beautiful landing page, easy registration, and an in-depth overview of each API. Deutsche Bank provides around 9 APIs with advanced security protocols and a customer story to explain common use cases. Nordea Open Banking offers one of the best onboarding techniques with training videos, Swagger collections, and sample code. Barclays' API program is one of the largest in the industry with over 12 well-maintained APIs and a developer portal that delivers a great experience. Square provides an easy-to-integrate service with great developer experience, while Stripe offers one of the best if not the absolute best developer experience in the FinTech space, onboarding non-developer decision makers and providing pre-built plug-ins and extensions. Visa's Developer Center is one of the most beautiful platforms seen, communicating with users through rich messaging and visuals. CoinAPI combines data from all virtual currency exchanges and provides incredible utility to cryptocurrency traders with ease in consuming its API.