RANDOM.ORG offers true random numbers to anyone on the Internet. The randomness comes from atmospheric noise, which for many purposes is better than the pseudo-random number algorithms typically used in computer programs.

People use RANDOM.ORG for holding drawings, lotteries and sweepstakes, to drive online games, for scientific applications and for art and music. The service has existed since 1998 and was built by Dr Mads Haahr of the School of Computer Science and Statistics at Trinity College, Dublin in Ireland. Today, RANDOM.ORG is operated by Randomness and Integrity Services Ltd. 

This application interfaces to the service RANDOM.ORG via the Hyper-Text Transfer Protocol (HTTP), and does not require any signup or registration. The free service, however, has a maximum daily quota usage, that can be verified anytime through the API method Quota Checker.

Available services:

• The Integer Generator will generate truly random integers in configurable intervals.
• The Sequence Generator will randomize a given interval of integers, i.e., arrange them in random order.
• The String Generator will generate truly random strings of various length and character compositions.
• The Quota Checker allows you to examine your quota at any point in time. The quota system works on the basis of IP addresses.

Detailed information about this interface in HTTP Interface Description. Please take into account the Guidelines for Automated Clients when integrating with this service.

If you need a more robust integration with the JSON/RPC interface, that offers digital signing of results (among other things ), please check the forge component Random.org API.