api
Practical resources about api for software engineers.
102 results
Building Robust APIs
APIs are the contract between systems. Whether you are exposing a public REST endpoint, designing an internal GraphQL schema, or integrating with a third-party service, the patterns you choose determine reliability, performance, and developer experience.
Here you will find recipes for handling CORS, implementing pagination, versioning endpoints, managing rate limits, and documenting APIs with OpenAPI. Each example includes runnable code in multiple languages so you can adapt it to your stack immediately.
Test API Contracts with Consumer-Driven Contracts
How to prevent breaking changes between microservices using consumer-driven contract testing with...
API Mocking for Testing
Build reliable tests by mocking external APIs with WireMock, MockServer, and MSW to eliminate...
Gateway Routing Pattern
Route requests to multiple backend services through a single entry point that handles cross-cutting...
Adapter Pattern for Integrating External REST APIs
Use the Adapter pattern to normalize responses from external REST APIs into a consistent internal...
Backend for Frontend (BFF) Pattern
Give each client type its own backend that aggregates downstream services and shapes data to that...
Chain of Responsibility for Request Processing Middleware
Pass requests along a chain of handlers where each handler decides whether to process the request...
Decorator Pattern for HTTP Request Pipelines
Use the Decorator pattern to compose cross-cutting concerns like logging, metrics, and retries into...
GraphQL Batched Resolver Pattern
Resolve nested GraphQL fields in a single batched request to eliminate N+1 queries and reduce...
GraphQL DataLoader Pattern
Coalesce individual load requests into batched calls with per-request caching to prevent N+1...
GraphQL Error Extension Pattern
Attach structured metadata to GraphQL errors using extension codes for predictable client-side...
GraphQL Interface Polymorphism Pattern
Model polymorphic types with GraphQL interfaces to share field contracts across different object...
GraphQL Schema Stitching Pattern
Merge multiple independent GraphQL schemas into a single unified schema that clients can query as...
Token Bucket Rate Limiter: Smooth Traffic with Token Buckets
How to implement token bucket rate limiting for API protection — bucket refill, burst handling,...
API Changelog Template
A template for documenting API changes including breaking changes, new features, deprecations, and...
API Deprecation Notice Template
A template for communicating API deprecations, breaking changes, and sunset timelines to consumers.
API Error Handling Guideline
A guideline for standardizing error responses, status codes, and error payloads across REST and...
API Rate Limiting Policy Template
A template for defining API rate limits per consumer tier, including burst allowances, quota...
SLA Definition Template
A template for defining and documenting Service Level Agreements including uptime targets, response...
API Performance Budget Template
A template for setting and tracking API latency and throughput performance budgets.
API Documentation Template
A reusable template for documenting REST and GraphQL APIs with endpoints, schemas, errors, and...
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