GraphQL Best Practices for Production APIs

GraphQL provides flexibility that REST can't match, but that flexibility requires discipline. Here's how to build GraphQL APIs that scale.

Schema Design#

Think in Graphs, Not Endpoints#

Use Connections for Pagination#

Nullable vs Non-Nullable#

Resolvers#

DataLoader for N+1 Prevention#

Error Handling#

Performance#

Query Complexity Analysis#

Query Depth Limiting#

Persisted Queries#

Security#

Authentication & Authorization#

Input Validation#

Subscriptions#

Schema Evolution#

Conclusion#

GraphQL's flexibility is both its strength and its challenge. Use DataLoader to prevent N+1 queries, implement proper pagination, and secure your API at every level. Design your schema as a graph, not a collection of endpoints.

Start simple and add complexity only when needed. A well-designed GraphQL API can serve many use cases without modification.