Our Core API lets your applications use true randomness from RANDOM.ORG's trusted technology.
The Basic API gives you random values of many types and is useful for applications that high-quality randomness, such as games and simulations.
The Signed API has all the functions of the Basic API and also lets you prove that your random values really came from RANDOM.ORG (authenticity) and that your application has not changed them (integrity). This is useful for many applications, such as a finance, auditing, games and lotteries.
All RANDOM.ORG services use true randomness from atmospheric noise, which for many purposes is better than the pseudo-random number algorithms typically used in computer programs.