GraphQL Schema Stitching
GraphQL Schema Stitching is a technique for combining multiple GraphQL schemas into a single, unified schema, allowing a GraphQL server to aggregate data from various sources (e.g., microservices, APIs, or databases) into one endpoint. It enables developers to create a cohesive API by merging types, queries, and mutations from disparate schemas, often using tools like Apollo Federation or custom stitching logic. This approach simplifies client interactions by providing a single point of access while maintaining modularity in the backend architecture.
Developers should use GraphQL Schema Stitching when building applications that rely on multiple GraphQL services or need to integrate data from different sources, such as in microservices environments or when consolidating legacy APIs. It is particularly useful for creating a unified API gateway that hides complexity from clients, improving performance by reducing round trips and enabling schema composition without rewriting existing services. This technique helps scale GraphQL implementations by allowing incremental adoption and independent service evolution.