Page 6 - REST-API

Custom Magento 2 GraphQL resolvers connect the schema, query logic and service layer. What matters most is clear types, clean resolver classes and an architecture that does not push business logic directly into the resolver.

An ERP integration often decides whether Magento reliably shows current prices, stock and orders, or whether support and finance constantly correct discrepancies. The right architecture with data mapping, message queue and clear conflict resolution makes the difference between a fragile point to point coupling and a resilient ERP integration.

curl is the Swiss army knife for HTTP from the shell. Anyone who knows the right flags, parses JSON responses precisely with jq, handles authentication securely, and implements retry logic with exponential backoff can automate REST APIs directly in Bash, without external frameworks.

Anyone maintaining OpenAPI specifications in a separate browser editor wastes time and risks inconsistencies between documentation and code. PhpStorm offers full schema validation, intelligent autocompletion and an integrated preview, all without ever leaving the IDE.

JSON Web Tokens are the modern standard for stateless authentication, yet flawed implementations open the door to attackers. This article walks through the most common pitfalls such as algorithm confusion, unprotected payload data, and insecure storage, and delivers concrete, tested PHP solutions for robust API authentication.

API design is one of the decisions that accompanies a product for years, because breaking changes are expensive. Claude helps with API design assistance by checking resource naming, versioning strategy, error formats and pagination against existing conventions before the first endpoint is implemented.

A REST API that loads the same data from the database on every request and sends it back in full wastes bandwidth and server resources. ETag, Last-Modified and Cache-Control are the HTTP standard tools that prevent exactly that, with 304 Not Modified for unchanged resources and proxy caching for public data.

API keys for internal service-to-service communication have a structural problem: a stolen key can be used from anywhere, without the server noticing that the request does not actually come from the expected service. Mutual TLS solves this by having both sides of the connection identify each other via certificate, not just the server to the client.

HTTP PATCH is the most commonly misimplemented method in REST APIs. The reason: there are two standardized variants with very different semantics, and most implementations invent a third, proprietary variant that is neither documented nor consistent. Merge Patch and JSON Patch solve real problems, but different ones.

API keys unlock interfaces for partners, marketplaces, and internal services, yet poorly managed keys remain one of the most common entry points for data breaches. This article shows how to generate API keys with sufficient entropy, scope them to minimal permissions, rotate them without downtime, and revoke them immediately on suspected compromise, with practical guidance for Magento backends.