api-stds

A lightweight toolkit for standardizing API responses and improving developer experience in Node.js applications.
Includes async handler, configurable response formats, error normalization, request ID injection, and more, all customizable with api-stds.config.json.

Features

• ⚡ Async handler, no more try/catch boilerplate.
• 📦 Standardized responses, consistent success/error payloads.
• 🛠 Config-driven, customize behavior via api-stds.config.json.
• 🆔 Request ID support, opt-in correlation IDs for debugging.
• 📜 Error normalization, unify error shapes.
• 🔧 CLI, quick project setup via npx api-stds init.

Installation

npm i api-stds

Initialization

Run once per project:

npx api-stds init

This will:

• Create a api-stds.config.json
• Prompt you for features (e.g. enable requestId)
• Install api-stds if not already installed

Example Usage

Express Example

import express from "express";
import { asyncHandler, stdResponse } from "api-stds";

const app = express();

app.get(
  "/user",
  asyncHandler(async (req, res) => {
    const user = { id: 1, name: "Captain" };
    res.json(stdResponse.success(user));
  })
);

app.get(
  "/error",
  asyncHandler(async () => {
    throw new Error("Something went wrong!");
  })
);

app.listen(3000, () => console.log("Server running on port 3000"));

Example Success Response

{
  "status": "success",
  "data": {
    "id": 1,
    "name": "Captain"
  },
  "requestId": "3f2d8a17-9d34-4c8c-8f2b-9a123c4c5a90"
}

Example Error Response

{
  "status": "error",
  "message": "Something went wrong!",
  "code": "INTERNAL_SERVER_ERROR",
  "requestId": "3f2d8a17-9d34-4c8c-8f2b-9a123c4c5a90"
}

Configuration

api-stds.config.json (auto-generated with npx api-stds init):

{
  "useRequestId": true,
  "responseFormat": {
    "successKey": "data",
    "errorKey": "message",
    "includeTimestamp": true
  }
}

Scripts

npm run build     # compile TypeScript → dist
npm run test      # run unit tests
npm run lint      # lint with ESLint
npm run format    # format with Prettier