Swagger-typescript-api: TypeScript API Generator via Swagger Scheme


Generate api via swagger scheme.
Supports OA 3.0, 2.0, JSON, yaml
Generated api module use Fetch Api or Axios to make requests.

Any questions you can ask here or in our slack(#swagger-typescript-api channel)

P.S. If you are creating the PR, please check your changes with using command npm run prepare
P.S. If you want to contribute please use the next branch. All PRs that has target master will be declined!

Thanks to Jetbrains for providing a free license for their excellent Webstorm IDE.

👀 Examples

All examples you can find here

📄 Usage

Usage: sta [options]
Usage: swagger-typescript-api [options]
Usage: swagger-typescript-api generate-templates [options]

  -v, --version                 output the current version
  -p, --path <string>           path/url to swagger scheme
  -o, --output <string>         output path of typescript api file (default: "./")
  -n, --name <string>           name of output typescript api file (default: "Api.ts")
  -t, --templates <string>      path to folder containing templates
  -d, --default-as-success      use "default" response status code as success response too.
                                some swagger schemas use "default" response status code as success response type by default. (default: false)
  -r, --responses               generate additional information about request responses
                                also add typings for bad responses (default: false)
  --union-enums                 generate all "enum" types as union types (T1 | T2 | TN) (default: false)
  --add-readonly                generate readonly properties (default: false)
  --route-types                 generate type definitions for API routes (default: false)
  --no-client                   do not generate an API class
  --enum-names-as-values        use values in 'x-enumNames' as enum values (not only as keys) (default: false)
  --extract-request-params      extract request params to data contract (Also combine path params and query params into one object) (default: false)
  --extract-request-body        extract request body type to data contract (default: false)
  --extract-response-body       extract response body type to data contract (default: false)
  --extract-response-error      extract response error type to data contract (default: false)
  --modular                     generate separated files for http client, data contracts, and routes (default: false)
  --js                          generate js api module with declaration file (default: false)
  --module-name-index <number>  determines which path index should be used for routes separation (example: GET:/fruites/getFruit -> index:0 -> moduleName -> fruites) (default: 0)
  --module-name-first-tag       splits routes based on the first tag (default: false)
  --disableStrictSSL            disabled strict SSL (default: false)
  --disableProxy                disabled proxy (default: false)
  --axios                       generate axios http client (default: false)
  --unwrap-response-data        unwrap the data item from the response (default: false)
  --disable-throw-on-error      Do not throw an error when response.ok is not true (default: false)
  --single-http-client          Ability to send HttpClient instance to Api constructor (default: false)
  --silent                      Output only errors to console (default: false)
  --default-response <type>     default type for empty response schema (default: "void")
  --type-prefix <string>        data contract name prefix (default: "")
  --type-suffix <string>        data contract name suffix (default: "")
  --clean-output                clean output folder before generate api. WARNING: May cause data loss (default: false)
  --api-class-name <string>     name of the api class (default: "Api")
  --patch                       fix up small errors in the swagger source definition (default: false)
  --debug                       additional information about processes inside this tool (default: false)
  --another-array-type          generate array types as Array<Type> (by default Type[]) (default: false)
  --sort-types                  sort fields and types (default: false)
  --sort-routes                 sort routes in alphabetical order (default: false)
  --custom-config <string>      custom config: primitiveTypeConstructs, hooks, ...  (default: "")
  --extract-enums               extract all enums from inline interface\type content to typescript enum construction (default: false)
  -h, --help                    display help for command

  generate-templates              Generate ".ejs" templates needed for generate api
    -o, --output <string>         output path of generated templates
    -m, --modular                 generate templates needed to separate files for http client, data contracts, and routes (default: false)
    --http-client <string>        http client type (possible values: "fetch", "axios") (default: "fetch")
    -c, --clean-output            clean output folder before generate template. WARNING: May cause data loss (default: false)
    -r, --rewrite                 rewrite content in existing templates (default: false)
    --silent                      Output only errors to console (default: false)
    -h, --help                    display help for command

Also you can use npx:

 npx swagger-typescript-api -p ./swagger.json -o ./src -n myApi.ts

You can use this package from nodejs:

const { generateApi, generateTemplates } = require('swagger-typescript-api');
const path = require("path");
const fs = require("fs");

/* NOTE: all fields are optional expect one of `input`, `url`, `spec` */
  name: "MySuperbApi.ts",
  // set to `false` to prevent the tool from writing to disk
  output: path.resolve(process.cwd(), "./src/__generated__"),
  url: 'http://api.com/swagger.json',
  input: path.resolve(process.cwd(), './foo/swagger.json'),
  spec: {
    swagger: "2.0",
    info: {
      version: "1.0.0",
      title: "Swagger Petstore",
    // ...
  templates: path.resolve(process.cwd(), './api-templates'),
  httpClientType: "axios", // or "fetch"
  defaultResponseAsSuccess: false,
  generateClient: true,
  generateRouteTypes: false,
  generateResponses: true,
  toJS: false,
  extractRequestParams: false,
  extractRequestBody: false,
  extractEnums: false,
  unwrapResponseData: false,
  prettier: { // By default prettier config is load from your project
    printWidth: 120,
    tabWidth: 2,
    trailingComma: "all",
    parser: "typescript",
  defaultResponseType: "void",
  singleHttpClient: true,
  cleanOutput: false,
  enumNamesAsValues: false,
  moduleNameFirstTag: false,
  generateUnionEnums: false,
  typePrefix: '',
  typeSuffix: '',
  enumKeyPrefix: '',
  enumKeySuffix: '',
  addReadonly: false,
  sortTypes: false,
  sortRouters: false,
  extractingOptions: {
    requestBodySuffix: ["Payload", "Body", "Input"],
    requestParamsSuffix: ["Params"],
    responseBodySuffix: ["Data", "Result", "Output"],
    responseErrorSuffix: ["Error", "Fail", "Fails", "ErrorData", "HttpError", "BadResponse"],
  /** allow to generate extra files based with this extra templates, see more below */
  extraTemplates: [],
  anotherArrayType: false,
  fixInvalidTypeNamePrefix: "Type",
  fixInvalidEnumKeyPrefix: "Value", 
  codeGenConstructs: (constructs) => ({
    RecordType: (key, value) => `MyRecord<key, value>`
  primitiveTypeConstructs: (constructs) => ({
      string: {
        'date-time': 'Date'
  hooks: {
    onCreateComponent: (component) => {},
    onCreateRequestParams: (rawType) => {},
    onCreateRoute: (routeData) => {},
    onCreateRouteName: (routeNameInfo, rawRouteInfo) => {},
    onFormatRouteName: (routeInfo, templateRouteName) => {},
    onFormatTypeName: (typeName, rawTypeName, schemaType) => {},
    onInit: (configuration) => {},
    onPreParseSchema: (originalSchema, typeName, schemaType) => {},
    onParseSchema: (originalSchema, parsedSchema) => {},
    onPrepareConfig: (currentConfiguration) => {},
  .then(({ files, configuration }) => {
    files.forEach(({ content, name }) => {
      fs.writeFile(path, content);
  .catch(e => console.error(e))

  cleanOutput: false,
  httpClientType: "fetch",
  modular: false,
  silent: false,
  rewrite: false,

ğŸ’Ž options


This option needed for cases when you don't want to use the default swagger-typescript-api output structure
You can create custom templates with extensions .ejs or .eta


How to use it:

copy swagger-typescript-api templates into your place in project

add --templates PATH_TO_YOUR_TEMPLATES option

modify ETA templates as you like

Eta has special directive to render template in your Eta templates - includeFile(pathToTemplate, payload)
If you want to use some default templates from this tool you can use path prefixes: @base, @default, @modular.
@base - path to base templates
@default - path to single api file templates
@modular - path to multiple api files templates
- includeFile("@base/data-contracts.ejs", { ...yourData, ...it })
- includeFile("@default/api.ejs", { ...yourData, ...it })
- includeFile("@default/procedure-call.ejs", { ...yourData, ...it })
- includeFile("@modular/api.ejs", { ...yourData, ...it })
- includeFile("@modular/procedure-call.ejs", { ...yourData, ...it })
- includeFile("@base/route-docs.ejs", { ...yourData, ...it })
- includeFile("@base/route-name.ejs", { ...yourData, ...it })
- includeFile("@base/route-type.ejs", { ...yourData, ...it })
- includeFile("@base/route-types.ejs", { ...yourData, ...it })


This option should be used in cases when you have api with one global prefix like /api
with --module-name-index 0 Api class will have one property api
When we change it to --module-name-index 1 then Api class have two properties fruits and vegetables


This option will group your API operations based on their first tag - mirroring how the Swagger UI groups displayed operations

extraTemplates (NodeJS option)

type (Record<string, any> & { name: string, path: string })[]
This thing allow you to generate extra ts\js files based on extra templates (one extra template for one ts\js file)
Example here

generate-templates command

This command allows you to generate source templates which using with option --templates

Modification internal codegen structs with NodeJS API:

You are able to modify TypeScript internal structs using for generating output with using generateApi options codeGenConstructs and primitiveTypeConstructs.


This option has type (struct: CodeGenConstruct) => Partial<CodeGenConstruct>.

  // ...
  codeGenConstructs: (struct) => ({
      Keyword: {
          Number: "number",
          String: "string",
          Boolean: "boolean",
          Any: "any",
          Void: "void",
          Unknown: "unknown",
          Null: "null",
          Undefined: "undefined",
          Object: "object",
          File: "File",
          Date: "Date",
          Type: "type",
          Enum: "enum",
          Interface: "interface",
          Array: "Array",
          Record: "Record",
          Intersection: "&",
          Union: "|",
      CodeGenKeyword: {
          UtilRequiredKeys: "UtilRequiredKeys",
       * $A[] or Array<$A>
      ArrayType: (content) => {
          if (this.anotherArrayType) {
              return `Array<${content}>`;

          return `(${content})[]`;
       * "$A"
      StringValue: (content) => `"${content}"`,
       * $A
      BooleanValue: (content) => `${content}`,
       * $A
      NumberValue: (content) => `${content}`,
       * $A
      NullValue: (content) => content,
       * $A1 | $A2
      UnionType: (contents) => _.join(_.uniq(contents), ` | `),
       * ($A1)
      ExpressionGroup: (content) => (content ? `(${content})` : ""),
       * $A1 & $A2
      IntersectionType: (contents) => _.join(_.uniq(contents), ` & `),
       * Record<$A1, $A2>
      RecordType: (key, value) => `Record<${key}, ${value}>`,
       * readonly $key?:$value
      TypeField: ({ readonly, key, optional, value }) =>
          _.compact([readonly && "readonly ", key, optional && "?", ": ", value]).join(""),
       * [key: $A1]: $A2
      InterfaceDynamicField: (key, value) => `[key: ${key}]: ${value}`,
       * $A1 = $A2
      EnumField: (key, value) => `${key} = ${value}`,
       * $A0.key = $A0.value,
       * $A1.key = $A1.value,
       * $AN.key = $AN.value,
      EnumFieldsWrapper: (contents) =>
          _.map(contents, ({ key, value }) => `  ${key} = ${value}`).join(",\n"),
       * {\n $A \n}
      ObjectWrapper: (content) => `{\n${content}\n}`,
       * /** $A *\/
      MultilineComment: (contents, formatFn) =>
              ...(contents.length === 1
                  ? [`/** ${contents[0]} */`]
                  : ["/**", ...contents.map((content) => ` * ${content}`), " */"]),
          ].map((part) => `${formatFn ? formatFn(part) : part}\n`),
       * $A1<...$A2.join(,)>
      TypeWithGeneric: (typeName, genericArgs) => {
          return `${typeName}${genericArgs.length ? `<${genericArgs.join(",")}>` : ""}`;

For example, if you need to generate output Record<string, any> instead of object you can do it with using following code:

    // ...
    codeGenConstructs: (struct) => ({
        Keyword: {
            Object: "Record<string, any>",


It is type mapper or translator swagger schema objects. primitiveTypeConstructs translates type/format schema fields to typescript structs.
This option has type

type PrimitiveTypeStructValue =
  | string
  | ((schema: Record<string, any>, parser: import("./src/schema-parser/schema-parser").SchemaParser) => string);

type PrimitiveTypeStruct = Record<
  "integer" | "number" | "boolean" | "object" | "file" | "string" | "array",
  string | ({ $default: PrimitiveTypeStructValue } & Record<string, PrimitiveTypeStructValue>)

declare const primitiveTypeConstructs: (struct: PrimitiveTypeStruct) => Partial<PrimitiveTypeStruct>

    // ...
    primitiveTypeConstructs: (struct) => ({
        integer: () => "number",
        number: () => "number",
        boolean: () => "boolean",
        object: () => "object",
        file: () => "File",
        string: {
            $default: () => "string",

            /** formats */
            binary: () => "File",
            file: () => "File",
            "date-time": () => "string",
            time: () => "string",
            date: () => "string",
            duration: () => "string",
            email: () => "string",
            "idn-email": () => "string",
            "idn-hostname": () => "string",
            ipv4: () => "string",
            ipv6: () => "string",
            uuid: () => "string",
            uri: () => "string",
            "uri-reference": () => "string",
            "uri-template": () => "string",
            "json-pointer": () => "string",
            "relative-json-pointer": () => "string",
            regex: () => "string",
        array: (schema, parser) => {
            const content = parser.getInlineParseContent(schema.items);
            return parser.safeAddNullToType(schema, `(${content})[]`);

For example, if you need to change "string"/"date-time" default output as string to Date you can do it with using following code:

    primitiveTypeConstructs: (struct) => ({
        string: {
            "date-time": "Date",

See more about swagger schema type/format data here

📄 Mass media

🛠️ Contribution

❗❗❗ Please use the next branch :)

If you need to check your changes at schemas in tests folder before create a PR just run command npm run test-all

🚀 How it looks

Download Details:

Author: Acacode
Source Code: https://github.com/acacode/swagger-typescript-api 
License: MIT license

#node #nodejs #api #typescript #rest #generator #swagger 

Swagger-typescript-api: TypeScript API Generator via Swagger Scheme
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