@kubb/oas
Installation
shell
bun add @kubb/oasshell
pnpm add @kubb/oasshell
npm install @kubb/oasshell
yarn add @kubb/oasInfer 
beta
With the type Infer you can infer your Swagger/OpenAPI schema without the need of creating the types. This gives you TypeScript power with autocompletion of specific paths, methods and schemas.
TIP
This can also be used as a standalone solution without the CLI generation.
Prepare
Start by creating a TypeScript file that exports your OpenAPI document. Due to limitations in TypeScript, importing types directly from JSON files isn't currently supported. To work around this, simply copy and paste the content of your Swagger/OpenAPI file into the TypeScript file and then export it with the as const modifier.
typescript
export default { openapi: '3.0.0' /* ... */ } as consttypescript
const oas = {
'openapi': '3.0.1',
'info': {
},
'servers': [
{
'url': 'http://petstore.swagger.io/api',
},
],
'paths': {
'/pets': {
'get': {
'description': 'Returns all pets from the system that the user has access to',
'operationId': 'findPets',
'parameters': [
{
'name': 'limit',
'in': 'query',
'description': 'maximum number of results to return',
'schema': {
'type': 'integer',
'format': 'int32',
},
},
],
'responses': {
'200': {
'description': 'pet response',
'content': {
'application/json': {
'schema': {
'type': 'array',
'items': {
'$ref': '#/components/schemas/Pet',
},
},
},
},
},
},
},
'post': {
'description': 'Creates a new pet in the store. Duplicates are allowed',
'operationId': 'addPet',
'requestBody': {
'description': 'Pet to add to the store',
'content': {
'application/json': {
'schema': {
'$ref': '#/components/schemas/NewPet',
},
},
},
'required': true,
},
'responses': {
'200': {
'description': 'pet response',
'content': {
'application/json': {
'schema': {
'$ref': '#/components/schemas/Pet',
},
},
},
},
},
},
},
},
'components': {
'schemas': {
'Pet': {
'allOf': [
{
'$ref': '#/components/schemas/NewPet',
},
{
'required': [
'id',
],
'type': 'object',
'properties': {
'id': {
'type': 'integer',
'format': 'int64',
},
},
},
],
},
'NewPet': {
'required': [
'name',
],
'type': 'object',
'properties': {
'name': {
'type': 'string',
},
'tag': {
'type': 'string',
},
},
},
},
},
} as constInferring OAS Schema Types
Model
To infer models from an OpenAPI document, use the Model type.
typescript
import type { Infer, Model } from '@kubb/oas'
const oas = {
'openapi': '3.0.1',
'info': {
},
'servers': [
{
'url': 'http://petstore.swagger.io/api',
},
],
'paths': {
'/pets': {
'get': {
'description': 'Returns all pets from the system that the user has access to',
'operationId': 'findPets',
'parameters': [
{
'name': 'limit',
'in': 'query',
'description': 'maximum number of results to return',
'schema': {
'type': 'integer',
'format': 'int32',
},
},
],
'responses': {
'200': {
'description': 'pet response',
'content': {
'application/json': {
'schema': {
'type': 'array',
'items': {
'$ref': '#/components/schemas/Pet',
},
},
},
},
},
},
},
'post': {
'description': 'Creates a new pet in the store. Duplicates are allowed',
'operationId': 'addPet',
'requestBody': {
'description': 'Pet to add to the store',
'content': {
'application/json': {
'schema': {
'$ref': '#/components/schemas/NewPet',
},
},
},
'required': true,
},
'responses': {
'200': {
'description': 'pet response',
'content': {
'application/json': {
'schema': {
'$ref': '#/components/schemas/Pet',
},
},
},
},
},
},
},
},
'components': {
'schemas': {
'Pet': {
'allOf': [
{
'$ref': '#/components/schemas/NewPet',
},
{
'required': [
'id',
],
'type': 'object',
'properties': {
'id': {
'type': 'integer',
'format': 'int64',
},
},
},
],
},
'NewPet': {
'required': [
'name',
],
'type': 'object',
'properties': {
'name': {
'type': 'string',
},
'tag': {
'type': 'string',
},
},
},
},
},
} as const
export type Oas = Infer<typeof oas>
export type Pet = Model<Oas, 'Pet'>
RequestParams
To infer request body parameters from an OpenAPI document, utilize the RequestParams type
typescript
import type { Infer, RequestParams } from '@kubb/oas'
const oas = {
'openapi': '3.0.1',
'info': {
},
'servers': [
{
'url': 'http://petstore.swagger.io/api',
},
],
'paths': {
'/pets': {
'get': {
'description': 'Returns all pets from the system that the user has access to',
'operationId': 'findPets',
'parameters': [
{
'name': 'limit',
'in': 'query',
'description': 'maximum number of results to return',
'schema': {
'type': 'integer',
'format': 'int32',
},
},
],
'responses': {
'200': {
'description': 'pet response',
'content': {
'application/json': {
'schema': {
'type': 'array',
'items': {
'$ref': '#/components/schemas/Pet',
},
},
},
},
},
},
},
'post': {
'description': 'Creates a new pet in the store. Duplicates are allowed',
'operationId': 'addPet',
'requestBody': {
'description': 'Pet to add to the store',
'content': {
'application/json': {
'schema': {
'$ref': '#/components/schemas/NewPet',
},
},
},
'required': true,
},
'responses': {
'200': {
'description': 'pet response',
'content': {
'application/json': {
'schema': {
'$ref': '#/components/schemas/Pet',
},
},
},
},
},
},
},
},
'components': {
'schemas': {
'Pet': {
'allOf': [
{
'$ref': '#/components/schemas/NewPet',
},
{
'required': [
'id',
],
'type': 'object',
'properties': {
'id': {
'type': 'integer',
'format': 'int64',
},
},
},
],
},
'NewPet': {
'required': [
'name',
],
'type': 'object',
'properties': {
'name': {
'type': 'string',
},
'tag': {
'type': 'string',
},
},
},
},
},
} as const
export type Oas = Infer<typeof oas>
export type AddPet = RequestParams<Oas, '/pets', 'post'>
export type GetPet = RequestParams<Oas, '/pets', 'get'>
Response
To infer the response body of an OpenAPI document, utilize the Response type
typescript
import type { Infer, Response } from '@kubb/oas'
const oas = {
'openapi': '3.0.1',
'info': {
},
'servers': [
{
'url': 'http://petstore.swagger.io/api',
},
],
'paths': {
'/pets': {
'get': {
'description': 'Returns all pets from the system that the user has access to',
'operationId': 'findPets',
'parameters': [
{
'name': 'limit',
'in': 'query',
'description': 'maximum number of results to return',
'schema': {
'type': 'integer',
'format': 'int32',
},
},
],
'responses': {
'200': {
'description': 'pet response',
'content': {
'application/json': {
'schema': {
'type': 'array',
'items': {
'$ref': '#/components/schemas/Pet',
},
},
},
},
},
},
},
'post': {
'description': 'Creates a new pet in the store. Duplicates are allowed',
'operationId': 'addPet',
'requestBody': {
'description': 'Pet to add to the store',
'content': {
'application/json': {
'schema': {
'$ref': '#/components/schemas/NewPet',
},
},
},
'required': true,
},
'responses': {
'200': {
'description': 'pet response',
'content': {
'application/json': {
'schema': {
'$ref': '#/components/schemas/Pet',
},
},
},
},
},
},
},
},
'components': {
'schemas': {
'Pet': {
'allOf': [
{
'$ref': '#/components/schemas/NewPet',
},
{
'required': [
'id',
],
'type': 'object',
'properties': {
'id': {
'type': 'integer',
'format': 'int64',
},
},
},
],
},
'NewPet': {
'required': [
'name',
],
'type': 'object',
'properties': {
'name': {
'type': 'string',
},
'tag': {
'type': 'string',
},
},
},
},
},
} as const
export type Oas = Infer<typeof oas>
export type AddPetResponse = Response<Oas, '/pets', 'post'>