Popular
JSON Schema
Standard vocabulary for describing and validating JSON data
Design and SDKsStandard for JSON validation
Alternatives to TypeSpec
12 tools like TypeSpec, chosen by what they do. About TypeSpec
Freemium
Fern
Generate SDKs, API docs and a CLI from an OpenAPI spec
Design and SDKsSDKs and docs from your API
Open source
OpenAPI Generator
Generates API clients, server stubs and docs from OpenAPI
Design and SDKsGenerate clients from OpenAPI
Open source
Scalar
Hosted API docs, typed SDKs and MCP servers from an OpenAPI file
Design and SDKsModern OpenAPI docs and client
Open source
AsyncAPI
Open source specification and tools for event-driven APIs
Design and SDKsSpec for event driven APIs
Curated
Bump.sh
Hosted API docs and MCP servers, built from your OpenAPI spec
Design and SDKsAPI docs with changelogs
Freemium
Apiary
Hosted platform to design, prototype, document and test APIs
Design and SDKsAPI design and docs platform
Open source
Joi
Schema description and validation library for JavaScript objects
Design and SDKsSchema validation for JS
Open source
Zod
TypeScript-first schema validation with static type inference
API DesignTypeScript schema validation
Open source
OpenAPI
Open standard for describing HTTP APIs in a machine-readable way
API DesignThe OpenAPI standard
Open source
Buf
Toolchain for Protobuf and gRPC with linting and code generation
GraphQL and RPCModern Protobuf tooling
Popular
Swagger
Open source tools for designing and documenting OpenAPI APIs
API DesignOpenAPI docs and tooling