UPDATED 6.55am: NSA whistleblower Edward Snowden has beamed into Auckland's Town Hall to tell New Zealanders we're being spied on right now.

By video link, he's rubbished the Prime Minister's denials over mass surveillance and his claims he stepped in a the 11th hour to be a hero and stop it going ahead.

"But you know there are actually NSA facilities in New Zealand that the GCSB is aware of, and that means the Prime Minister is aware of - and one of them is in Auckland."

Edward Snowden says a second one is in Northland.

They can see everything

NSA Whistleblower Edward Snowden has laid out exactly what American security experts have their eyes on when it comes to spying on New Zealanders.

"So I can see everything. I can see what book you looked at Amazon.com last week. I can see who you talked to, I can see who your Facebook friends are, I can see the text messages you sent, I can read the emails you wrote."

Snowden made the revelations of mass surveillance happening here at the big reveal at the Auckland Town Hall last night.

"When a journalist hears, 'oh, there's no mass surveillance in New Zealand', they need to follow up, they need to press and they need to say, 'Mr Prime Minister, what about X-Keyscore, what about the GCSB's involvement in X-Keyscore."

The Prime Minister released documents yesterday, showing a mass spying programme, called Cortex, never went ahead.... but on X-Keyscore, he is silent.

The Greens are accusing John Key of using national security, for his own political gain.

The Prime Minister released documents yesterday showing a mass spying programme, called Cortex, never went ahead.

Green Party co-leader Dr Russel Norman says the documents Mr Key has declassified, are a red herring.

"If he doesn't want to answer questions about something it becomes a security matter, but if he wants to try and put something out there that he thinks might help his cause for his personal political ambitions, then suddenly it all gets declassified."

Dr Norman says Mr Key needs to answer to X-Keyscore specifically.

"Is that system in operation in New Zealand? Does GCSB have access to it? Does it share it with the NSA? in the United States and did the Prime Minister authorise this?"

Russel Norman says it seems the Prime Minister is happy to declassify information, when it suits him.

John Key has previously refused to answer questions about X-Keyscore, saying it's an intelligence issue.

An email, which surfaced yesterday, appears to show John Key involved in a deal with Warner Brothers to grant Kim Dotcom residency, so he could be extradited to face American copyright charges.

Both Key and Warner Brothers say the email's a fabrication, but Dr Norman says if that's the case, it raises further questions.

"What was the reason, did the SIS suddenly change their mind and allow Dotcom into New Zealand?"