US President Donald Trump says he's "100 per cent" willing to testify under oath about his interactions with fired FBI director James Comey.

The statement comes a day after Comey delivered a scathing indictment of the president at the Senate Intelligence Committee, the president again denied two key claims made by the former FBI director and labelled him a "leaker".

Trump said he never asked Comey for a pledge of loyalty and never told Comey he hoped the investigation of Flynn would go away.

While Comey confirmed a lot of what Trump had claimed about their interactions, Trump said other parts of Comey's testimony "just weren't true".

WATCH: President Trump 'told lies', Comey testifies

Trump said the testimony on Thursday proved there was "no collusion, no obstruction" and that "he's a leaker".

Comey has been asked to provide any notes or memoranda related to discussions with President Trump, to the ongoing investigation into Russia's involvement in the election.

The leaders of the House of Representatives intelligence committee said they have written to Comey, and also Don McGahn, the White House counsel, and asked him whether White House recordings or memos of Comey's conversations with Trump exist.

If they do, they asked that copies of the materials be provided to the panel by June 23.