# API Providers
Table of Contents
API3 QRNG is built on Airnode RRP, and as a result is provider-agnostic. See below for the providers that are currently available.
# ANU Quantum Random Numbers
Website: https://quantumnumbers.anu.edu.au/ (opens new window)
Airnode address / airnode
(note that this is not AirnodeRrpV0 contract address, but the address that belongs to this individual Airnode)
0x9d3C147cA16DB954873A498e0af5852AB39139f2

(note that this is not AirnodeRrpV0 contract address, but the address that belongs to this individual Airnode)
Airnode extended public key / xpub

xpub6DXSDTZBd4aPVXnv6Q3SmnGUweFv6j24SK77W4qrSFuhGgi666awUiXakjXruUSCDQhhctVG7AQt67gMdaRAsDnDXv23bBRKsMWvRzo6kbf

# Endpoint IDs
Does not take any parameters. Returns one random number of type 
uint256
.
0xfb6d017bb87991b7495f563db3c8cf59ff87b09781947bb1e417006ad7f55a78

Takes one parameter named 
size
of type uint256
(maximum value: 1024
).
Returns size
- many random numbers of type uint256[]
.
0x27cc2713e7f968e4e86ed274a051a5c8aaee9cca66946f23af6f29ecea9704c3
