Hi, is there any tutorial how to use matrix in osmtools plugin QGIS ?

Hi, no, there isn’t yet… You just need to select point layers (fairly sure they have to be single-, not multi-geometries) and select a UID. But it COULD be, that the code is currently slightly broken, since there has been an update on the matrix endpoint a couple of weeks back, requiring the profile to be in the URL.

Please share your findings.