Scans daily updates of medical databases. PubCrawler offers a database that helps keeping scientists informed of the current contents of Medline and GenBank, by listing new database entries that match their research interests. PubCrawler searches the NCBI PubMed (Medline) and Entrez (GenBank) databases daily using search parameters (keywords, author names, etc.) specified by the user. It looks for matches to text (Medline and GenBank annotation), not sequences, and writes its output as a WWW page.