• Go to the exchange rates API documentation. For example, for exchangerate-api.com, the documentation is at https://www.exchangerate-api.com/docs.
• Find the API endpoint that you need to call to get the exchange rates data. For instance, a typical API endpoint could be https://api.exchangerate-api.com/v4/latest/USD.

• Use a programming language that can perform HTTP requests. For this example, we will use Python and its requests library.
• If you don’t have the requests library installed, install it using pip:
  ‍pip install requests

Create a new Python script to send a request to the API and handle the response.

import requests
import json

# Define the API endpoint URL
url = 'https://api.exchangerate-api.com/v4/latest/USD'

# Send a GET request to the API
response = requests.get(url)

# Check if the request was successful
if response.status_code == 200:
   # Parse the response to JSON format
   data = response.json()
   
   # Now `data` is a Python dictionary containing the exchange rates
else:
   print(f"Error: Unable to fetch data. Status code: {response.status_code}")
   exit()

# Define the filename where you want to store the data
filename = 'exchange_rates.json'

# Write the JSON data to a file
with open(filename, 'w') as json_file:
   json.dump(data, json_file, indent=4)

print(f"Data successfully written to {filename}")

• Execute the script from your command line or terminal by running:
  ‍python your_script_name.py

• If the API call is successful, you will see a message indicating that the data has been written to exchange_rates.json.

Open the exchange_rates.json file in a text editor or use a command line tool like cat on Unix systems or type on Windows to view its content and ensure that the data is correctly formatted in JSON.

• Make sure your script handles possible errors like network issues, invalid API keys, or exceeding rate limits.
• Implement error handling in your script to manage such situations gracefully.

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If you need to fetch the data regularly, consider scheduling the script to run at specific intervals using cron jobs (on Unix systems) or Task Scheduler (on Windows).

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