vreksam/WebApi/index.html

<h1>api</h1>
<a href="/api/foorum">foorum</a>
<button onclick="getForums()">GetAll</button>
<code><pre id="output"></pre></code>

<script>
    function getForums() {
        var out = document.getElementById("output");
        fetch("/api/foorum").then(resp => {
            return resp.json();
        }).then(data => {
            console.log(data);
            out.innerText = JSON.stringify(data, null, 2);
        });
    }
</script>