Access Code format/configuration

The Dropbox API authorization functionality includes a number of different types of values, including authorization codes, access tokens, and refresh tokens. You can find the documentation for all of that here. Each of those are only specified as "String" without a more specific format guaranteed, so make sure you're not programming assumptions about the formats into your app's code.

For the 'access_token' value in particular, the access token's expiration information is included in the 'expires_in' field, per the documentation.

I've noticed about a difference in access codes:

I have two Dropbox accounts, I created an app and I followed the auth flow for each account .

Account 1:

in this account all my access codes inits with PS:

Account 2:

In this account all my access codes doesn´t has a format like the first one:PSx_xx_

I want to know what is the difference because this situation it repeats when I share an app and I request the access  from another account the access code doesn't has the PS format.

These values may encode information about the relevant account, so you may notice patterns like this, but your app should not expect or rely on any particular format or pattern. Your app should only use the authorization code as supplied.

You should not attempt to decode or otherwise extract information from the authorization code itself. The format does not indicate the lifetime of the authorization code. Regardless of which account it came from, an authorization code can only be used once, and only for a short period of time.