Following infos are available (click on info for the URL):

Info Current value Description
stable 2.7 Stable version.
stable_number 34013184 (0x02070000) Stable version, as number, like plugin API: info_get("version_number").
stable_date 2019-12-08 Date of stable version (format: "YYYY-MM-DD").
devel 2.8-dev Development version.
git 6daa09b0b8b59d8f06fe8e81ff655e926fc9591d Output of "git rev-parse HEAD" for sources repository.
git_scripts d89a71dfd58a0d3c0b7f1579f4d32205e31482d7 Output of "git rev-parse HEAD" for scripts repository.
next_stable 2.8 Next stable version.
next_stable_number 34078720 (0x02080000) Next stable version, as number, like plugin API: info_get("version_number").
next_stable_date 2020-03-08 Approximate date of next stable version (format: "YYYY-MM-DD").
release_signing_fingerprint A9AB5AB778FA5C3522FD0378F82F4B16DEC408F8 Release signing key fingerprint (format: PGP fingerprint).
release_signing_key (binary data) Release signing key (format: PGP public key).
debian_repository_signing_fingerprint 11E9DE8848F2B65222AA75B8D1820DB22A11534E Debian/Ubuntu repository signing key fingerprint (format: PGP fingerprint).
debian_repository_signing_key (binary data) Debian/Ubuntu repository signing key (format: PGP public key).
all stable:2.7
stable_number:34013184
stable_date:2019-12-08
devel:2.8-dev
git:6daa09b0b8b59d8f06fe8e81ff655e926fc9591d
git_scripts:d89a71dfd58a0d3c0b7f1579f4d32205e31482d7
next_stable:2.8
next_stable_number:34078720
next_stable_date:2020-03-08
release_signing_fingerprint:A9AB5AB778FA5C3522FD0378F82F4B16DEC408F8
debian_repository_signing_fingerprint:11E9DE8848F2B65222AA75B8D1820DB22A11534E
All non-binary infos (one info by line, format: "info:value").

You can fetch these URLs from scripts or other sites.