Twenty-five countries have pledged $100 million in aid to Venezuela, a top US official said, as the crisis-hit country's Supreme Court took aim at oil executives appointed by the opposition.

"Today, 25 countries, united at the OAS-hosted Conference on Humanitarian Assistance in Support of Venezuela pledged $100 million in humanitarian assistance," US National Security Advisor John Bolton tweeted.

According to David Smolanksy, coordinator of an OAS working group on migration and refugees from Venezuela, the money will go directly to aid collection centres set up on the borders with Colombia and Brazil and on the Caribbean island of Curazao.

Maduro invites Trump envoy to come to Venezuela.

Read​ also: 'Caracas hasn't asked for military assistance'- Russian diplomat says

President Nicolas Maduro is inviting a US special envoy to come to Venezuela after revealing in an AP interview that his foreign minister recently held secret meetings with the US official in New York.

The second of two meetings took place four days after the envoy, Elliott Abrams, said the time for dialogue with Maduro's government had long passed.

Even while criticising Donald Trump's confrontational stance toward his socialist government, Maduro said he holds out hope of meeting the US president to resolve an impasse over his recognition of opponent Juan Guaido as Venezuela's rightful leader.

Maduro said he won't give up power and called the US humanitarian aid currently sitting on the border with Colombia mere "crumbs" after the US administration froze billions of dollars in Venezuela's assets.

Maduro said all Venezuela needs to rebound is for Trump to remove his "infected hand" from the country that sits atop the world's largest petroleum reserves.