REST API access token becomes invalid before its expiration time.

[Anonymous]

Hi,

Working with REST for Marketo, sometimes the access token becomes invalid before its expiration time (got response with error code 601 - Access token invalid: http://developers.marketo.com/documentation/rest/error-codes/  )

Does anyone also encounter this? What we might have done wrong?

Thanks, 

[Anonymous]

The token expires after 60 minutes. As Kenny mentioned, if you are requesting a second token before first token expires, then the first token becomes invalid. 

[Kenny_Elkington]

Hi Allan,

Is it possible that you're requesting a new token during the live period for existing one from the same client id?  This could cause extant tokens to become invalid.