There is only one API route:
https://charlesjlee.github.io/bitcoin-beacon/api/v1/random.json
and it returns data formatted like this:
{
"block_hash": "0000000000000000000ae92414a5d908254927edd7663cd1c52ddd66d503a024",
"timestamp": "2020-09-10 15:10:47",
"random_binary": "01101111100011101100110111111110",
"random_int": 1871629822,
"block": 647617
}