The EMBL Nucleotide Sequence Database constitutes Europe's primary nucleotide sequence resource.This webservice currently provides access to over 16.8 million records, consisting of 19.6 billion nucleotides . It also provides access to completed genomes, including the human genome, the fruit fly, and C. elegans

Endpoint

http://www.webservicex.net/EMBLNucleotideSequenceWebService.asmx?WSDL

Demo