Episode 119 of The API Podcast dives into cursor-based pagination—why it's better than offset pagination for stable, efficient data traversal in modern APIs. Lucas and Luna break down the problem: traditional offset pagination breaks when new records are added or deleted mid-query. They explain how cursor pagination solves this by using opaque pointers, and walk through a concrete example with Twitter's v2 API timeline endpoint. They cover implementation trade-offs (cursor field choice, base64 encoding, forward vs. backward pagination) and contrast it with keyset pagination. The episode also touches on performance considerations: cursor pagination avoids database scanning large offsets, making it ideal for large, dynamic datasets. No abstract theory—just practical patterns for API designers dealing with paginated lists.

#CursorPagination #API #REST #GraphQL #WebAPIs #Backend #Database #Pagination #Cursor #PageToken #TwitterAPI #OffsetPagination #KeysetPagination #Performance #DataTraversal #Technology #FexingoBusiness #BusinessPodcast

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Webhooks let APIs push events to your server in real time—no polling, no wasted bandwidth. In this episode, Lucas and Luna break down how webhooks work under the hood, using GitHub's webhook system as a concrete example. They explain the difference between webhooks and polling, the retry and security challenges (including signature verification with HMAC), and why idempotent delivery matters when you can't afford to miss a payment event from Stripe. You'll also learn how services like Zapier have built entire businesses on making webhooks accessible to non-developers. If you've ever wondered why your CI/CD pipeline triggers automatically on a git push, or how Slack bots know when a teammate posts a message, this episode will give you the mental model.

#Webhooks #EventDriven #RealTimeAPIs #GitHub #Stripe #Zapier #HMAC #Idempotency #RetryPolicies #CallbackURLs #PushVsPoll #ServerSentEvents #WebhookSecurity #CI/CD #SlackAPIs #Technology #FexingoBusiness #BusinessPodcast

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In this episode, Lucas and Luna dive into GraphQL subscriptions, a feature that enables real-time data streaming over WebSockets. They compare it to traditional REST polling and WebSockets, using a live sports scores example from ESPN to illustrate latency and bandwidth savings. The hosts also discuss the challenges of scaling subscriptions, including backpressure and state management, and why the pattern is gaining traction for dashboards, chat apps, and live feeds. A must-listen for developers building reactive UIs.

#GraphQL #Subscriptions #RealTime #WebSockets #APIs #GraphQLSubscriptions #Backpressure #LiveData #EventDriven #WebDevelopment #Technology #FexingoBusiness #BusinessPodcast #APIDesign #Scalability #ReactiveProgramming #ESPN #PubSub

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In this episode, Lucas and Luna dive into idempotency keys, the unsung heroes of safe API retries. They explore how payment platforms like Stripe rely on idempotency to prevent duplicate charges, using a simple header to turn 'try again' from a disaster into a safe operation. The conversation covers the key-idempotency pattern, how servers detect and respond to retries with the same key, and the design choices around key generation and expiration. They also touch on the trade-offs: unique keys per request versus reusing keys, and the challenge of guaranteeing idempotency in distributed systems. With concrete examples and a nod to real-world implementations, this episode makes a strong case for adding idempotency to your API design pattern toolkit.

#Idempotency #API #REST #Stripe #PaymentAPIs #SafeRetries #HTTP #DesignPatterns #DistributedSystems #WebAPIs #DeveloperTools #Technology #FexingoBusiness #BusinessPodcast #APIDesign #IdempotencyKey #RetryStrategy #BackendEngineering

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In this episode, Lucas and Luna dive into the unsung hero of API reliability: rate limiting headers. Using the real-world example of GitHub’s API, which processes over a billion requests per day, they explain how headers like X-RateLimit-Limit and Retry-After prevent abuse and ensure fair usage. Lucas breaks down the differences between fixed-window, sliding-window, and token bucket algorithms, while Luna shares how Twitter’s API rate limits shaped developer trust after the 2023 API pricing changes. They also explore how companies like Stripe communicate limits through granular headers, and why a well-designed header can save your integration from cascading failures. If you've ever been baffled by a 429 Too Many Requests error, this episode is for you.

#APIRateLimiting #RateLimitHeaders #GitHubAPI #StripeAPI #TwitterAPI #429Error #TokenBucket #SlidingWindow #FixedWindow #RetryAfter #APIReliability #DeveloperExperience #WebAPIs #Technology #FexingoBusiness #BusinessPodcast #APIEngineering #BackendDevelopment

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In this episode, Lucas and Luna dive into GraphQL Federation, the Apollo-originated architecture that lets teams compose a single unified API graph from multiple microservices. They walk through a concrete example: a fictional e-commerce platform where separate services handle products, reviews, and inventory, yet clients query them as one endpoint. Lucas explains how the federation gateway stitches schemas using entity keys and resolves references across service boundaries, while Luna presses on real-world trade-offs like schema coordination overhead and debugging complexity. They also touch on how companies like Netflix and Shopify have adopted similar patterns, and contrast federation with alternatives like schema stitching and BFFs. By the end, listeners understand why federation is gaining traction in 2026 for organizations scaling API ecosystems without sacrificing team autonomy.

#GraphQL #Federation #ApolloGraphQL #Microservices #APIDesign #SchemaStitching #Gateway #Composition #Technology #FexingoBusiness #BusinessPodcast #APIArchitecture #DistributedSystems #Netflix #Shopify #EntityKeys #Subgraphs #DeveloperExperience

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In this episode, Lucas and Luna explore consumer-driven contracts — a pattern where API consumers define their expectations in executable tests, and providers agree to meet them. They walk through a real example: how a mobile team at a fictional ride-share company, GoRide, uses Pact to define contracts with the pricing API, catching breaking changes before deployment. They discuss tradeoffs versus OpenAPI specs, the role of contract testing in microservices, and why sharing contract stubs speeds up frontend development. The episode ends with a reflection on cultural shifts needed for CDC adoption. If you've ever been surprised by a breaking API change, this pattern could change your workflow.

#ConsumerDrivenContracts #PactFramework #ContractTesting #APIDesign #Microservices #OpenAPI #GoRide #BreakingChanges #ProviderVerification #MockServers #IntegrationTesting #FrontendBackendContract #CDC #Technology #FexingoBusiness #BusinessPodcast #APIPodcast #SoftwareArchitecture

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Lucas and Luna dive into JSON Web Tokens, or JWTs, as a stateless authentication method for APIs. They explain what a JWT actually contains—header, payload, signature—and walk through a concrete example from a mock e-commerce API. The pair compare JWTs to traditional session-based authentication, discuss when stateless tokens shine (like microservices), and flag the critical security gotcha: you cannot revoke a JWT before it expires. They also touch on the risks of storing sensitive data in the payload, since the payload is only base64-encoded, not encrypted. By the end, listeners understand why JWTs have become the default for modern API authentication and where they should be cautious.

#JSONWebTokens #JWT #Authentication #StatelessAuth #APISecurity #REST #GraphQL #WebAPIs #TokenBasedAuth #Microservices #TechPodcast #Technology #SoftwareEngineering #DeveloperTools #FexingoBusiness #BusinessPodcast #LucSandLuna #TheAPIPodcast

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In this episode of The API Podcast, Lucas and Luna explore the concept of API discoverability through human-centered documentation. They focus on the case of Stripe's API docs — how Stripe uses consistent naming, logical endpoint grouping, and inline examples to reduce cognitive load for developers. They discuss the difference between machine-readable specs (OpenAPI) and developer-friendly docs, and why Stripe's approach became an industry benchmark. The hosts also touch on how smaller APIs can adopt similar principles without a massive team, using tools like Write the Docs and interactive playgrounds. Listeners learn one concrete takeaway: the 'stripe-ification' of API docs has shifted expectations across the industry.

#API #DeveloperExperience #Documentation #Stripe #REST #GraphQL #OpenAPI #DeveloperTools #HumanCenteredDesign #CognitiveLoad #TechPodcast #SoftwareEngineering #WebDev #APIDesign #FexingoTechnology #FexingoBusiness #BusinessPodcast #DeveloperProductivity

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Lucas and Luna break down the circuit breaker pattern in API design — using Netflix's Hystrix and open-source alternatives to show how a single failed dependency can take down an entire system if you don't have proper failure isolation. They walk through real-world examples: a 2017 AWS S3 outage that cascaded through half the internet, and how a streaming service might use three states (closed, open, half-open) to gracefully degrade. By the end, you'll understand why circuit breakers are like a smart fuse box for microservices — and how to tune thresholds so your API fails small instead of catastrophically.

#CircuitBreaker #APIDesign #Microservices #NetflixHystrix #Resilience4j #FailureIsolation #CascadingFailure #AWSS3 #ServiceDegradation #ApiResilience #FaultTolerance #BackendArchitecture #Technology #SoftwareEngineering #SiteReliability #DistributedSystems #FexingoBusiness #BusinessPodcast

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