We are building an application programming interface (API) that will provide high-performance, web-based computational access for plant genomics data. The project will include a new, open technology for generating computational data web services; an open, portable, optimized data warehouse that supports very fast queries of plant biology data; and a plant biology query language, query builder, and query optimizer that will provide a simple way to limit query results to only the required data. The project will provide a range of data access methods to serve the needs of computational biologists and bench biologists for large and custom datasets. Implementation of this software at TAIR will provide REST and SOAP web services for computational use of TAIR data, RSS feeds for TAIR objects, and an implementation of a new query builder for TAIR.