# Network API
Inspect and modify every HTTP request and response the player performs with network interceptors.
Tip: open your browser's developer console and use the `player` and `THEOplayer` variables to interact with this demo.
### Network log
AllRequestsResponses
Pause logClear\[x]Reverse subtitle text (response interceptor)
No requests logged yet. Play the video to see network traffic.
`player.network.addRequestInterceptor()` fires for every outgoing request; `addResponseInterceptor()` for every incoming response. This example logs each one, and — while the checkbox is on — reverses the text of every `.vtt` subtitle response body with `response.respondWith()`, so enable subtitles to see the effect. The interceptor only affects subtitle files loaded after it runs.
```js
player.network.addRequestInterceptor((request) => {
console.log('Request', request.method, request.url);
});
player.network.addResponseInterceptor((response) => {
console.log('Response', response.status, response.url);
if (response.url.indexOf('.vtt') !== -1 && typeof response.body === 'string') {
response.respondWith({ body: transform(response.body) });
}
});
```
See the [request and response interceptors guide](https://optiview.dolby.com/docs/theoplayer/how-to-guides/web/network/request-response-interceptors.md).
Code
demo.html
```html
Network API
```