No idea if HelloJS is a secure client or not, but it's possible. Here's a good resource for how Google offers purely client-side OAuth to API consumers: https:/

No idea if HelloJS is a secure client or not, but it's possible. Here's a good resource for how Google offers purely client-side OAuth to API consumers: https://developers.google.com/accounts/docs/OAuth2 https://developers.google.com/accounts/docs/OAuth2 I believe this is only possible since OAuth2. One important aspect is that the API provider registers the consumer's key along with their domain, so API requests using that key are only valid coming from that domain.