  The high-significance measurement of large-scale structure signals enables
testing the isotropy of the Universe. The measurement of cosmological
parameters through the large-scale distribution of matter is now a mature
domain. This approach is mainly limited by our knowledge of astrophysical
processes that are used to observe the large-scale structure. However, when we
assume that these astrophysical processes are the same across the Universe,
then it is possible to tightly constrain the isotropy of cosmological
parameters across the sky. Particularly the X-SZ cross-correlation has been
shown to be a probe of the large scale structures that has a high
signal-to-noise ratio and low bias. For this analysis, we used a localized
measurement of the X-SZ cross-correlation as a test of the cosmological
parameter isotropy. Using the scatter of the X-SZ cross-correlation across the
sky, we derive cosmological constraints $\sigma_{8} \left( \Omega_{\rm m}/0.28
\right)^{0.34} = 0.78 \pm 0.02$ and tight isotropy constraints on the dark
energy dipole $\Delta \Omega_{\Lambda} < 0.07$ at 95\% confidence level.
