API Patterns and Integrations (REST and GraphQL)

Overview

REST and GraphQL are common API styles with different trade-offs for flexibility, performance, and governance.

Pattern Comparison

• REST: resource-oriented endpoints, strong HTTP semantics
• GraphQL: client-defined queries, flexible data retrieval

flowchart LR
    A[Client] --> B{API Style}
    B --> C[REST Endpoints]
    B --> D[GraphQL Schema]
    C --> E[Services]
    D --> E

Practical REST Example

GET /v1/orders/1452

Practical GraphQL Example

query {
  order(id: "1452") {
    id
    status
    total
  }
}

Production Example

Many teams use REST for broad platform APIs and GraphQL for front-end aggregation needs, especially when clients require varied data shapes.

Common Pitfalls

• No pagination strategy in GraphQL lists
• Missing caching and idempotency design in REST
• Ignoring schema and contract governance

Key Takeaways

• API style should match consumer needs and team capability.
• Contract governance is critical for both REST and GraphQL.
• Mixed API strategies are common in large platforms.