API Gateway
An API gateway is a server that acts as the single entry point for client requests, routing them to appropriate backend services, handling authentication, rate limiting, logging, and other cross-cutting concerns for a distributed system.
Understanding API Gateway
In a microservices architecture, dozens of independent services handle different aspects of an application. An API gateway provides a single entry point that abstracts this complexity. Clients send all requests to the gateway, which handles authentication, authorization, rate limiting, load balancing, SSL termination, request transformation, and logging before routing requests to the appropriate backend service. API gateways are essential infrastructure for production AI applications that expose services to web and mobile clients.
How GAIA Uses API Gateway
GAIA's FastAPI backend handles API gateway responsibilities for its web, desktop, and mobile clients. Authentication and authorization are enforced at the API layer before requests reach agent logic or database services. This centralized API layer also handles request validation, error handling, and response formatting consistently across all client types.
Related Concepts
API Integration
API integration is the process of connecting different software applications through their Application Programming Interfaces, enabling them to share data and functionality seamlessly.
Microservices
Microservices is an architectural pattern that structures an application as a collection of small, independently deployable services, each responsible for a specific business capability and communicating through well-defined APIs.
OAuth
OAuth (Open Authorization) is an open standard for delegated authorization that allows a third-party application to access a user's data in another service without requiring the user to share their password.
REST API
A REST (Representational State Transfer) API is a web service interface that uses standard HTTP methods (GET, POST, PUT, DELETE, PATCH) to access and manipulate resources identified by URLs, following a set of architectural conventions that make APIs predictable and interoperable.
