apollographql/graphql-tools

Features

• GraphQL Schema Stitching - Combines several independent GraphQL schemas into a single unified API gateway.
• Schema Stitching Gateways - Combines multiple independent GraphQL services into a single unified gateway via schema stitching.
• GraphQL API Mocking - Creates simulated GraphQL backends with custom data generators to enable frontend development without a live server.
• GraphQL Mocking Engines - Generates simulated GraphQL schemas and data to enable frontend development without a backend.
• GraphQL - Routes field resolution across multiple subschemas to unify data from different services into one endpoint.
• Field Resolvers - Binds resolver functions to a GraphQL schema to define how specific fields are fetched or computed.
• Field Delegation - Implements field resolution delegation to route requests across multiple subschemas in a unified gateway.
• Resolver Binding Managers - Binds resolver functions to GraphQL fields and validates coverage across the schema.
• GraphQL Schema Composition Tools - Merges multiple GraphQL type definitions and schemas into a single unified API gateway.
• GraphQL Schema Construction - Combines type definitions and resolver functions into a single executable schema from distributed sources.
• Schema-First Mapping - Maps resolver functions to a pre-defined schema structure by parsing schema definition language strings.
• SDL Parsers - Converts Schema Definition Language strings into executable GraphQL schema objects.
• GraphQL Schema Generation - Creates schema instances by combining schema definition language strings with corresponding resolver functions.
• Schema-First Development Frameworks - Prioritizes schema definition as the source of truth for API generation.
• SDL Schema Generation - Creates functional schemas from definition language strings with support for resolvers, interfaces, and unions.
• Scalar-Based Mocking - Creates a schema that returns simulated data based on scalar types to enable rapid prototyping.
• Mock Value Generators - Provides utilities to generate randomized or predefined mock data based on GraphQL scalar types.
• Entity Type Unification - Unifies different type definitions from multiple services that refer to the same entity to fetch fields from multiple sources.
• GraphQL Development Tooling - Provides utilities for validating resolver coverage and attaching documentation to GraphQL types and fields.
• GraphQL Response Simulation - Simulates API responses with per-type mocking to enable prototyping without active data sources.
• GraphQL Mock Value Customization - Defines specific return values or generator functions for scalars and object types to simulate realistic data models.
• Resolution Delegation - Extends unified schemas by adding fields that route the resolution process to another subschema.
• API Mocking Servers - Simulates a backend server in development environments to decouple frontend and backend work.
• Resolver Coverage Validation - Checks schemas to ensure required resolvers exist for arguments, non-scalar fields, or interface types.
• Type Definition Merging - Merges multiple type definition strings into a consolidated schema definition while resolving conflicts.
• Type Extensions - Adds new fields to existing types across multiple schema definitions to prevent oversized root lists.
• GraphQL Development Tools - Tool library for building and maintaining GraphQL-JS servers.

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