Microlink.io Authentication: API Key Guide & Security (2026)

Authentication overview

Microlink.io secures its API endpoints primarily through API keys. An API key acts as a unique identifier for your application, allowing the Microlink.io service to verify your identity and ensure that requests originate from an authorized source. This mechanism helps manage access, track usage, and enforce rate limits associated with your account. Implementing robust authentication is a fundamental aspect of secure API integration, protecting both your data and the service provider's infrastructure. Microlink.io's approach aligns with common practices for RESTful APIs, where API keys are a prevalent method for client authorization due to their simplicity and ease of implementation for developers requiring access to services like data extraction or screenshot generation Microlink.io API overview.

The authentication process typically involves including your API key in every request to the Microlink.io API. This key serves as a credential that grants your application permission to execute specific operations and consume resources under your account's subscription plan. Without a valid API key, requests to protected endpoints will be rejected, preventing unauthorized access and maintaining the integrity of the service. Adhering to secure handling practices for your API key is crucial for preventing misuse and ensuring the confidentiality of your account's operations.

Supported authentication methods

Microlink.io exclusively supports API key authentication for accessing its public API endpoints. This method is a straightforward and widely adopted approach for securing access to web services Google Maps API key best practices. The API key is a secret token that clients present to the server to prove their identity.

The following table outlines the supported authentication method for Microlink.io:

While API keys offer simplicity, their security largely depends on how they are stored and transmitted. For Microlink.io, it is imperative to transmit API keys over HTTPS (HTTP Secure) to encrypt the communication channel and prevent eavesdropping, as outlined by general web security guidelines Mozilla's explanation of HTTPS. Microlink.io's API is designed to enforce HTTPS for all requests, ensuring that your API key is encrypted during transit.

Getting your credentials

To begin using Microlink.io's API, you will need to obtain an API key. This key is provisioned through your Microlink.io account dashboard. The process is designed to be self-service and immediate, allowing you to generate and manage your keys quickly.

1. Sign Up/Log In: First, navigate to the Microlink.io homepage and either sign up for a new account or log in to an existing one. A free tier is available, providing 500 requests per month, which is sufficient for initial testing and development Microlink.io pricing details.
2. Access Dashboard: Once logged in, you will be redirected to your personal dashboard. This is the central hub for managing your account, subscriptions, and API keys.
3. Locate API Key Section: Within the dashboard, look for a section specifically dedicated to API keys or credentials. This is typically labeled something like 'API Key', 'Settings', or 'Developers'.
4. Generate Key: If you don't already have an API key, there will be an option to generate a new one. Click this button to create your unique API key. Microlink.io may allow you to generate multiple keys for different projects or environments, offering better key rotation and access control.

5. Copy Key: Once generated, your API key will be displayed. It is crucial to copy this key immediately and store it securely. For security reasons, Microlink.io typically does not allow you to retrieve the key again after it has been generated and displayed for the first time. If you lose it, you might need to revoke it and generate a new one Microlink.io documentation.

It is recommended to store your API key in environment variables or a secure configuration management system rather than hardcoding it directly into your application's source code. This practice minimizes the risk of accidental exposure if your code repository is compromised.

Authenticated request example

To authenticate a request to the Microlink.io API, you must include your API key as a query parameter named &apikey in your API calls. This is the standard method for transmitting credentials for Microlink.io's services.

Here's an example using curl to make a request to the Microlink.io Metadata API for extracting information from a URL, including the API key:

curl 'https://api.microlink.io/?url=https%3A%2F%2Fmicrolink.io&apikey=YOUR_API_KEY'

Replace YOUR_API_KEY with the actual API key you obtained from your Microlink.io dashboard. This example demonstrates a simple GET request for metadata. For more complex operations, such as screenshot generation or using the insights API, the principle of including the &apikey query parameter remains the same.

Here's a Node.js example using the Microlink.io SDK:

const mql = require('@microlink/mql');

(async () => {
  const { status, data, response } = await mql('https://microlink.io', {
    screenshot: true,
    apiKey: process.env.MICROLINK_API_KEY // Recommended: use environment variables
  });

  if (status === 'success') {
    console.log('Metadata:', data.metadata);
    console.log('Screenshot URL:', data.screenshot.url);
  } else {
    console.error('Error:', response.statusText);
  }
})();

In the Node.js example, the apiKey is passed as a configuration option to the mql function. It is best practice to retrieve API keys from environment variables (e.g., process.env.MICROLINK_API_KEY) rather than embedding them directly in code, enhancing security and flexibility.

For Python:

import requests
import os

API_KEY = os.environ.get('MICROLINK_API_KEY') # Retrieve from environment variable
TARGET_URL = 'https://microlink.io'

if API_KEY:
    params = {
        'url': TARGET_URL,
        'screenshot': 'true',
        'apikey': API_KEY
    }
    response = requests.get('https://api.microlink.io/', params=params)

    if response.status_code == 200:
        data = response.json()
        print('Metadata:', data.data['metadata'])
        print('Screenshot URL:', data.data['screenshot']['url'])
    else:
        print(f"Error: {response.status_code} - {response.text}")
else:
    print("MICROLINK_API_KEY environment variable not set.")

These examples illustrate how to correctly include your API key in requests, which is essential for successful authentication and access to Microlink.io's various features.

Security best practices

Securing your Microlink.io API key is critical to prevent unauthorized access to your account and potential service disruptions or unexpected billing. Adhering to robust security practices ensures the integrity of your API interactions.

• Keep your API key confidential: Treat your Microlink.io API key as you would a password. Never embed it directly into publicly accessible client-side code (e.g., JavaScript running in a web browser) or commit it directly into public source code repositories.
• Use environment variables: Store your API key in environment variables on your server or build system. This practice isolates the key from your source code and makes it easier to manage across different deployment environments (development, staging, production) without altering the code itself. Most programming languages and frameworks provide straightforward ways to access environment variables.
• Transmit over HTTPS only: Microlink.io enforces HTTPS for all API communications. This ensures that your API key is encrypted during transit, protecting it from interception by malicious actors. Always verify that your application is communicating with https://api.microlink.io.
• Implement server-side calls: For web applications, it is best practice to make Microlink.io API calls from your application's backend server rather than directly from the client-side browser. This prevents the API key from being exposed in the client's browser, which could be inspected by unauthorized users. The backend can then proxy the request and return the processed data to the client.
• Rotate API keys periodically: Although Microlink.io's dashboard might not explicitly offer automated key rotation, you can manually rotate your API keys by generating a new one and updating your applications. This reduces the risk associated with a compromised key over time. If a key is suspected of being compromised, revoke it immediately and generate a new one.
• Monitor usage and logs: Regularly review your Microlink.io dashboard for API usage patterns. Unusual spikes in requests or unexpected activity could indicate a compromised key. Monitoring helps you detect and respond to potential security incidents promptly.
• Restrict access to credentials: Limit who in your organization has access to your Microlink.io API key. Implement principle of least privilege, ensuring that only individuals or systems that absolutely require access to the key can retrieve and use it.

By following these security best practices, you can significantly mitigate the risks associated with API key management and maintain a secure integration with Microlink.io's services.