Control-Plane Openness Catalog: Vendor Control-Plane Openness Grades and Source Data

Machine-readable catalog of control-plane openness grades for 13 commercial quantum computing vendors across superconducting, trapped-ion, neutral-atom, and photonic modalities. Each vendor is graded on six axes: (1) SDK pulse-level access, (2) calibration data publication, (3) control electronics interface, (4) queue model, (5) reproducibility guarantees, and (6) SDK license. The CSV includes source URLs and accessed-on dates per cell. Data cutoff: May 1, 2026. Companion to the preprint "Control-Plane Openness in Near-Term Quantum Computing: A Survey of Vendor Stacks and Field Implications."