This is a simple server that can be used to send envelopes to (instead of sending them to Sentry or a relay). The server will print the envelopes received and the Sentry HTTP headers to the console.

Run this one script, it will create an virtual environment and install the dependencies and then run the server on port 9999:

./run.sh

Then use http://123@localhost:9999/0 as DSN in your SDK.