Under the Authentication section on https://api.stackexchange.com/docs/js-lib, there are a few typos (emphasis mine):

>scope (optional) – an array of scopes to request during authentication, valid scopes are in the authentication **documentaiton**.

`documentaiton` => `documentation`

>If networkUsers was not passed to SE.authenticate networkUsers will **not bet set**, if set it is an array of network_user objects.

`not bet set` => `not be set`

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Under the Errors section:

>Note that **the user reject** an application is conceptually an error.

`the user reject` => `the user rejecting`

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Under the Unregistered Users section:

>We want to provide this data, but we also want to be able to shut down **scrappers** who aren't following our attribution terms

`scrappers` => `scrapers`

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Also, this isn't a typo, but I think this could be rephrased:

>Once you have authenticated a user once

the duplicate `once` doesn't sound right!

As [@JF suggests](http://stackapps.com/questions/6893/typos-on-api-stackexchange-com-docs-js-lib?noredirect=1#comment14890_6893), it could be:

>After you have authenticated a user once