palmwtc processes data from automated whole-tree chambers (WTC) sized to enclose individual oil palm trees, instrumented with LI-COR LI-850 gas analyzers. It performs multi-stage quality control, computes CO2 and H2O fluxes from concentration cycles, validates against literature ecophysiology references, and produces inputs for the XPalm digital-twin calibration pipeline. To our knowledge, this is the first whole-tree-chamber deployment for oil palm.