{ "recipient": { "id": "" }, "message": { "text": "Hello, this is a test message!" } } You can use a programming language of your choice to make the API call and send the message. Facebook provides SDKs for various programming languages such as PHP, JavaScript, Python, etc. that can simplify the process. Please note that Facebook has strict policies around the use of its API and messaging features, and you should ensure that your use case complies with Facebook's terms of service and policies.