httpmsgbus (HMB) can be used as a standalone program or as an add-on to SeisComP [1]; the code can be copied to SeisComP source tree and compiled together with the rest of the SeisComP using CMake or installed separately using the install.sh script. Go compiler (<1.16) [2] is required to compile the code. Go 1.16 and newer are currently not supported due to incompatibilities of the module system. Libpcre (pcre-devel, libpcre3-dev or similar Linux package) is also required, unless the "vendor" directory is removed to link with standard Go regexp package. Using the standard Go regexp package creates a portable binary, but there seems to be a memory leak (ever growing cache) in some Go versions. In SeisComP, HMB is disabled by default and can be enabled by adding the following options to ~/seiscomp/etc/kernel.cfg: hmb.enable = true hmb.port = 8000 The distribution includes an alternative Seedlink implementation consisting of "hmbseedlink" and "wavefeed" modules, which can used as a drop-in replacement for the standard "seedlink" module. Normal seedlink bindings are used, but only chain sources are supported. There are two simple demo scripts, send_json.py and receive_json.py, in doc/examples/python directory. Start httpmsgbus without arguments and call "python send_json.py notice 'something happened'" in another shell. The bus http://localhost:8000/test and the queue SYSTEM_ALERT will be created dynamically. Now start "python receive_json.py" in third shell window. You can observe that messages sent by send.py will be received by receive.py. BSON counterpars of the scripts, send_bson.py and receive_bson.py require the "python-pymongo" package to be installed. You may also test persistent storage by using the option "-D filedb://filedb" of httpmsgbus. The folder "filedb" will be created in the current directory (use filedb:/// for absolute path). If you are running MongoDB, try "-D mongodb://localhost:27017". HMB does not implement SSL, HTTP compression and authentication. Those features can be provided by a reverse proxy (eg., Apache with mod_proxy). [1] https://www.seiscomp.de/ [2] https://golang.org/dl/