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    • Customers3 min read

      The startups helping smart retailers go green

      Meet the startups using card-linking to help conscious consumers do good as they shop

      By Niamh Cassidy – Head of Content
    • Product Updates1 min read

      Crossing the pond... we’re live in the U.S., and more product updates!

      From our launch in the U.S., to our sleek new SDK, check out what we've been working on this August!

      By Marie Volpe – Product Marketing Manager
    • Developers3 min read

      Unscripted: Q&A with Antonio, Software Engineer

      Software Engineer Antonio talks migrating to microservices, and why he likes the startup life

      By Niamh Cassidy – Head of Content
    • Loyalty5 min read

      Three trends driving the evolution of customer loyalty

      77% of loyalty programs fail. What are the trends you need to leverage to stay at the leading edge?

      By Niamh Cassidy – Head of Content
    • Unscripted3 min read

      Unscripted: Q&A with Tracy, Frontend Engineer

      Frontend engineer Tracy tells us how she builds with scalability in mind, and why Sentry’s her best friend.

      By Niamh Cassidy – Head of Content
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    © 2025. Enigmatic Smile Ltd trading as Fidel. Fidel API uses a proprietary tokenization system and does not store any card numbers.
    All API requests use TLSv1.2 with end-to-end encryption. Fidel API receives transaction authorization messages
    typically within seconds of a successful authorization event.

    © 2025. Enigmatic Smile Ltd trading as Fidel. Fidel API uses a proprietary tokenization system and does not store any card numbers. All API requests use TLSv1.2 with end-to-end encryption. Fidel API receives transaction authorization messages typically within seconds of a successful authorization event.

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