speckit-api-designer.agent

Designing a REST API with an OpenAPI-first approach involves creating a structured OpenAPI 3.1 spec before coding, using it as the source of truth for FastAPI project scaffolds, validation schemas, and route generation.

Structuring a multi-tenant REST API requires consistent resource modeling, versioned routes, and tenant-specific middleware. Using FastAPI, this establishes scalable patterns for authentication and isolation across different tenant data environments.

Yes, Pydantic is used to enforce validation schemas and security norms in an OpenAPI-first FastAPI project. It maps directly to the OpenAPI 3.1 contract to ensure strict data validation across multi-tenant resources.

Handling API versioning and error handling for SaaS backends requires scalable deployment via versioned routes and standardized error formats. FastAPI implements these alongside authentication norms defined in the OpenAPI spec.

Yes, the API-first design pattern works with FastAPI by generating a project skeleton from an OpenAPI 3.1 spec. It provides structured API contracts and middleware configurations that integrate into scalable multi-tenant backend deployments.