Marx's worm snake (Ramphotyphlops marxi) is a species of snake in the family Typhlopidae. The species is endemic to the Philippines.
The specific name, marxi, is in honor of American herpetologist Hymen Marx.
Ramphotyphlops marxi has 30 rows of scales around the body at midbody. Its snout has a horizontal transverse edge.
Ramphotyphlops marxi is known only from the holotype, collected from Samar island in the central Philippines in 1957. It presumably originated from a forested habitat.
Ramphotyphlops marxi is oviparous.