Try making requests to:
      <ul>
      <li><code><a href="/html?content=<h1>Hello</h1>">/html?content=BASE64</a></code>,</li>
      <li><code><a href="/svg?content=BASE64">/svg?content=BASE64</a></code>,</li>
      <li><code><a href="/iframe?url=https://example.com/">/iframe?url=https://example.com/</a></code>,</li>
      <li><code><a href="/redirect?redirectUrl=https://example.com/">/redirect?redirectUrl=https://example.com/</a></code>,</li>
      <li><code><a href="/proxy?modify&proxyUrl=https://example.com/">/proxy?modify&proxyUrl=https://example.com/</a></code>, or</li>
      <li><code><a href="/api/todos">/api/todos</a></code></li>
      
      <a href='https://github.com/allanlw/svg-cheatsheet'> SVG cheats</a>