OpenAPI definition

{
    "openapi": "3.0.0",
    "info": {
        "version": "1.0.0",
        "title": "Swagger Petstore",
        "license": {
            "name": "MIT"
        }
    },
    "servers": [
        {
            "url": "http://petstore.swagger.io/v1"
        }
    ],
    "paths": {
        "/pets": {
            "get": {
                "summary": "List all pets",
                "operationId": "listPets",
                "tags": [
                    "pets"
                ],
                "parameters": [
                    {
                        "name": "limit",
                        "in": "query",
                        "description": "How many items to return at one time (max 100)",
                        "required": false,
                        "schema": {
                            "type": "integer",
                            "format": "int32"
                        }
                    }
                ],
                "responses": {
                    "200": {
                        "description": "A paged array of pets",
                        "headers": {
                            "x-next": {
                                "description": "A link to the next page of responses",
                                "schema": {
                                    "type": "string"
                                }
                            }
                        },
                        "content": {
                            "application/json": {
                                "schema": {
                                    "$ref": "#/components/schemas/Pets"
                                }
                            }
                        }
                    },
                    "default": {
                        "description": "unexpected error",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "$ref": "#/components/schemas/Error"
                                }
                            }
                        }
                    }
                }
            },
            "post": {
                "summary": "Create a pet",
                "operationId": "createPets",
                "tags": [
                    "pets"
                ],
                "responses": {
                    "201": {
                        "description": "Null response"
                    },
                    "default": {
                        "description": "unexpected error",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "$ref": "#/components/schemas/Error"
                                }
                            }
                        }
                    }
                }
            }
        },
        "/pets/{petId}": {
            "get": {
                "summary": "Info for a specific pet",
                "operationId": "showPetById",
                "tags": [
                    "pets"
                ],
                "parameters": [
                    {
                        "name": "petId",
                        "in": "path",
                        "required": true,
                        "description": "The id of the pet to retrieve",
                        "schema": {
                            "type": "string"
                        }
                    }
                ],
                "responses": {
                    "200": {
                        "description": "Expected response to a valid request",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "$ref": "#/components/schemas/Pet"
                                }
                            }
                        }
                    },
                    "default": {
                        "description": "unexpected error",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "$ref": "#/components/schemas/Error"
                                }
                            }
                        }
                    }
                }
            }
        }
    },
    "components": {
        "schemas": {
            "Pet": {
                "type": "object",
                "required": [
                    "id",
                    "name"
                ],
                "properties": {
                    "id": {
                        "type": "integer",
                        "format": "int64"
                    },
                    "name": {
                        "type": "string"
                    },
                    "tag": {
                        "type": "string"
                    }
                }
            },
            "Pets": {
                "type": "array",
                "items": {
                    "$ref": "#/components/schemas/Pet"
                }
            },
            "Error": {
                "type": "object",
                "required": [
                    "code",
                    "message"
                ],
                "properties": {
                    "code": {
                        "type": "integer",
                        "format": "int32"
                    },
                    "message": {
                        "type": "string"
                    }
                }
            }
        }
    }
}