Welcome to our capstone unit! You've learned about clients, servers, HTTP requests, responses, APIs, and JSON. Now let's trace a complete API call from start to finish.

This will connect all the concepts you've learned into one clear example.

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Are you ready to see it all in action?

Let's imagine our app wants to get a random fact. It will use an API for this.

Step 1: The Request. Our app (the client) creates an HTTP GET request and sends it to the API's specific URL, known as an endpoint.

For example, GET https://api.example.com/facts/random.

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What do you think happens next?

Step 2: The Server's Work. The server at api.example.com receives the request. It sees the GET method and the /facts/random path.

Its code then runs a function to find a random fact from its database.

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What do you think the server will do once it finds the fact?

Step 3: The Response. The server packages the fact into a JSON format. It then creates an HTTP response.

Because the request was successful, the server includes a 200 OK status code. The JSON data is placed in the body of the response.

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