How to receive data from external publisher

Hello everyone I would like to know which data source to use to receive the data sent with cadence from a publisher that sends data in json format. And if in turn it is possible to send data from grafana to a listening server. In practice I would like to use Grafana as a frontend for its graphics. Where can I find a tutorial. Thanks

Welcome @sebscal65

Is this json sent as a file or some endpoint