How to Post data to API Using Node.js

This article guides you on how to send JSON data to an API using the axios library in Node.js, making it easy to perform POST requests to a web service.

In this article, we will use the axios library to send a POST request to an API and transmit JSON data. The code snippet will demonstrate how to send data efficiently and simply.

const axios = require('axios');

// API endpoint
const url = 'https://api.example.com/data';

// JSON data to be sent
const jsonData = {
  name: 'John Doe',
  age: 30,
  email: '[email protected]'
};

// Send POST request
axios.post(url, jsonData)
  .then(response => {
    console.log('Response from API:', response.data);
  })
  .catch(error => {
    console.error('An error occurred:', error);
  });

Detailed explanation

1. const axios = require('axios');: Import the axios library to perform HTTP requests.
2. const url = 'https://api.example.com/data';: Set the url variable to the API endpoint you want to send data to.
3. const jsonData = { ... }: Create a JSON object containing the data to be sent.
4. axios.post(url, jsonData): Send a POST request to the API with the JSON data.
5. .then(response => { ... }): If the request is successful, log the response from the API.
6. .catch(error => { ... }): If there's an error, log the error message for troubleshooting.

System Requirements

• Node.js version: 10.0 or later
• Library: axios (can be installed via npm)

How to install the libraries needed to run the Node.js code above

You can install the axios library using the following command in your terminal or command prompt:

npm install axios

Tips

• Check the API documentation before sending data to ensure it matches the required format.
• Handle errors and responses from the API carefully to avoid issues when using your application.