Swagger API Client Builder

Automatically generate an API client on top of Axios using Swagger document.

Basically using the Swagger document to generate a client in reverse.

Features

• Uses operationIds for function names.

• Optionally it can use the Swagger schema for input validation.

• Automatically converts the body to the correct content-type, but you can manually override it by defining the content-type in the axios request options.

• If the protocol, host and base path are defined then it will use them as baseURL, but you can manually override it by defining the baseURL in the axios config.

• Supports Swagger v2 and OpenAPI v3.

• Can be installed as a global package and export a standalone API client via the CLI.

• CLI can export both JavaScript and TypeScript.

Caveats

• operationId property is required for all paths.

Install

npm install swagger-client-builder

Or

yarn add swagger-client-builder

CLI

You can install the package globally using:

npm i swagger-client-builder -g

Usage

Usage: swagger-client-builder -i <input> -o <output> [options]
Options:

  -i, --input           Input swagger file path or URL (.json or .yaml or .yml)
  -o, --output          Output file path (.js or .ts)
  -v, --validation      Use jsonschema validation
  -e, --es              Use ES module import instead of CommonJs
  -t, --ts              Use TypeScript instead of JavaScript
  -s, --silent          Silent export (just export without prompts but will show errors)
  -T, --target          Target output ("file" or "bash")
  -V, --version         Show version

CLI Examples

Export to JavaScript with ES imports

swagger-client-builder -i https://petstore3.swagger.io/api/v3/openapi.json -o ./path/to/output.js -v -e

Export to JavaScript with CommonJs requires

swagger-client-builder -i https://petstore3.swagger.io/api/v3/openapi.json -o ./path/to/output.js -v

Export to TypeScript

swagger-client-builder -i https://petstore3.swagger.io/api/v3/openapi.json -o ./path/to/output.ts -v -t

Code Example

const SwaggerClientBuilder = require("swagger-client-builder");

async function main() {
    try {

        const swaggerFile = 'https://petstore3.swagger.io/api/v3/openapi.json'; // Or use file path

        const Client = new SwaggerClientBuilder(swaggerFile, {
            // Optional: Axios instance config
            baseURL: 'https://petstore3.swagger.io/api/v3'
        })

        await Client.build();

        const response = await Client.getPetById({
            params: { petId: 1 }
            /*
            query:{},
            body:{},

            // Axios request options
            options:{
                headers:{...}
            }
            */
        });

        console.log(response.data);


        // You can also export the client to a file from code
        await Client.export('./client.js',{
            validation: true,
        });

    } catch (error) {
        console.log(error);
    }
}

main();