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The API Podcast with Fexingo: REST, GraphQL, and Modern Web APIs

The API Podcast with Fexingo: REST, GraphQL, and Modern Web APIs

By: Fexingo
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Every week, Lucas and Luna sit down at a developer-focused office workstation to trace how applications actually talk to each other — not the hype, but the design decisions, trade-offs, and real-world failures that shape modern API architecture. Lucas, with a journalist's precision, lays out why a team chose REST over GraphQL for a payments pipeline handling 50,000 requests per second, or how a poorly designed endpoint caused a cascade failure in a major ride-hailing service. Luna, the engaged interlocutor, pushes back: when does schema flexibility become a liability? How do versioning strategies survive a decade of production use? Together, they dissect public postmortems, API design docs, and developer surveys — not to sell a tool, but to understand the engineering logic behind each choice. This show is for backend engineers, API product managers, and technical leads who need to decide, not just follow the trend. Expect no demos, no code walkthroughs — just two smart people reasoning about trade-offs in stateless design, pagination patterns, rate-limiting, and the cost of backward compatibility. By the end of each episode, you'll have a clearer framework for your own decisions: Should your next endpoint be a query or a mutation? When does an SDK become a maintenance burden? And how do you design an API that your colleagues will still respect five years from now? #REST #GraphQL #WebAPIs #APIDesign #BackendEngineering #SoftwareArchitecture #APIVersioning #Microservices #HTTP #DeveloperTools #APIPostmortem #PlatformEngineering #Technology #FexingoBusiness #BusinessPodcast #Business #TechPodcast #SoftwareEngineering Keep every episode free: buymeacoffee.com/fexingo© 2026 Fexingo. All rights reserved. Economics
Episodes
  • How APIs Use WebTransport for Next-Gen Real-Time Communication

    How APIs Use WebTransport for Next-Gen Real-Time Communication
    Jun 15 2026
    WebTransport is a new protocol that combines the low latency of WebSockets with the reliability of HTTP/3. In this episode, Lucas and Luna explore how WebTransport enables efficient, bidirectional, real-time communication for applications like live gaming, collaborative editing, and IoT streaming. They walk through a concrete example: a startup building a multiplayer drawing app that switches from WebSockets to WebTransport, cutting latency by 40% and handling packet loss without retransmission delays. They discuss the protocol's use of QUIC streams, unidirectional streams, and datagrams, and compare it to WebSockets and HTTP/2 server push. They also cover current browser support, polyfill options, and when NOT to use WebTransport. If your app needs real-time data at scale, this episode gives you a practical framework for evaluating WebTransport versus existing alternatives. #WebTransport #QUIC #HTTP3 #RealTimeCommunication #WebSockets #APIProtocols #Streaming #Latency #PacketLoss #Bidirectional #Datagrams #LiveGaming #CollaborativeEditing #IoT #BrowserAPIs #Technology #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo
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    10 mins
  • How APIs Use WebSockets for Persistent Connections

    How APIs Use WebSockets for Persistent Connections
    Jun 14 2026
    Episode 51 of The API Podcast digs into WebSockets — the protocol that flips the typical request-response model on its head. Lucas and Luna walk through a concrete example: how a real-time dashboard for a logistics startup cut latency from three seconds to under a hundred milliseconds by switching from polling to a persistent WebSocket connection. They discuss when WebSockets make sense (and when they don't), the upgrade handshake mechanics, how to handle reconnection gracefully, and why companies like Slack and Trello rely on them for live collaboration. If you want to understand the trade-offs between REST polling, Server-Sent Events, and full-duplex sockets, this episode gives you the mental model to make the call. #WebSockets #RealTimeAPI #PersistentConnections #APIProtocols #Latency #Polling #ServerSentEvents #FullDuplex #Slack #Trello #Logistics #TechPodcast #TheAPIPodcast #FexingoBusiness #BusinessPodcast #DeveloperTools #WebDevelopment #DataStreaming Keep every episode free: buymeacoffee.com/fexingo
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    10 mins
  • How APIs Handle Backward Compatibility Without Version Bumps

    How APIs Handle Backward Compatibility Without Version Bumps
    Jun 14 2026
    In this milestone 50th episode, Lucas and Luna dive into how modern API teams are moving away from explicit versioning in favor of backward-compatible evolution. They examine a real-world case: how a major payment processor—think Stripe-level scale—added a new required field to an existing endpoint without bumping the version number or breaking existing integrations. The conversation covers the three technical pillars that make this possible: additive-only changes, tolerance for unknown fields, and the use of `X-Forwarded-Compatibility` headers. Listeners will learn the concrete patterns that let APIs evolve continuously, and why 'never versioning' is becoming the gold standard for platform teams. #API #BackwardCompatibility #NeverVersioning #APIEvolution #AdditiveChanges #Stripe #PaymentProcessor #WebAPI #REST #GraphQL #OpenAPI #CompatibilityHeaders #DeveloperExperience #PlatformEngineering #Technology #TechPodcast #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo
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    13 mins
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