The Environmental Data Retrieval API SWG will standardize several APIs, defined with OpenAPI (Version 3), to query and retrieve various common data patterns from a relatively persistent data store. The data patterns will include, but are not restricted to, data at a point in space and time, time series at a point, data along a trajectory, which may be 2, 3, or 4 dimensional, within a 'corridor' around a trajectory, or covering a specified polygon or rectangular tile possibly with vertical and temporal extensions.