Hi Hans,
This link covers spotting SOTA via APRS,
Another option is Sotamat, it uses the suffix on you callsign sent via FT8. The suffix is converted to a SOTA or POTA spot by a look up table in the Sotamat system. I am yet to test it via JS8, but the information with the app states it's not stuck to FT8 but any digital mode that PSK Reporter does not strip the Suffix from call signs should work, e.g. RTTY, PSK and maybe others. Sotamat will also send pre-programed SMS's and Email via the same lookup table system.
?
73,
Warren
