Fidel API - One API for linking bank cards to applications, globally
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Design System Inspiration
Fidelapi — extracted via DESIGN.md
Fintech · Card linking API
Typography
Aeonik
Heading
Inter
Body
Color palette
TL;DR
Fidelapi utilizes a "Developer-First Monochrome" aesthetic, defined by a stark white background (`#ffffff`) and deep obsidian text (`#000000`). The system's "voltage" is concentrated in a single primary brand blue (`#2653f0`), used for high-intent CTAs and critical text links. A secondary lime accent (`#cbf265`) provides high-visibility highlights for badges and secondary actions. Layouts are structured with generous vertical rhythm (up to 144px) and a consistent 16px border radius for content containers, creating a balance between technical precision and approachable modern software design.
Target audience
The target audience is likely developers, fintech companies, and businesses looking to integrate real-time payment data into their applications.
Full tech stack
Analytics
Meta description
Power your applications with real-time payment data. Build innovative card-linking applications by connecting Visa, Mastercard and Amex cards to loyalty programs, delivering seamless rewards and personalized customer experiences.
Brand Voice
A technical, high-performance voice that balances developer utility with enterprise reliability.
Positioning
Fidel API is a financial infrastructure platform that provides a connectivity layer for card-linked experiences. It is built for developers and businesses looking to leverage real-time payment events to create reward programs and personalized user experiences.
Voice principles
- —Functional: Focuses on what the product does and how it works, using active verbs like "connect," "capture," and "leverage."
- —Scalable: Uses language that suggests growth and robustness, positioning the tool as both easy to start and powerful for large-scale use.
- —Technical: Speaks directly to a developer audience using industry-standard terminology without unnecessary fluff.
- —Secure: Maintains a professional, authoritative tone when discussing data, reliability, and platform standards.
