After 10 years of service beyond its active support by the generous Initiative for Chemical Genetics contract from the National Cancer Institute, ChemBank as you knew it will be retired.
Due to aging hardware, decade-old software, and deprecated web servers, ChemBank is presently unavailable in any form. We have stopped the web services to prevent serious vulnerabilities that our data-security group has demonstrated to be exploitable, and which due to age are not likely to be patched.
We are actively working on a solution to make ChemBank source data continuously and permanently available, even though it is likely the web services themselves will not return. We are also planning to release ChemBank web-service source code into the public domain.