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diff --git a/www/json-api/api-version.md b/www/json-api/api-version.md
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+# JSON API: /version
+([⬑JSON API Index](index.md))
+
+# Version (a.k.a. HAI)
+
+**Status:** implemented
+
+**Required privileges:** none
+
+**Requests:**
+
+-   `/json/version`
+-   `/json/HAI` (alias borrowed from LOLCATZ jargon)
+
+**Response payload example:**
+
+```json
+{
+"manifestUuid":"20ff808f9809541d2eca6c49a17d5cbd16e1b93f",
+"manifestVersion":"[20ff808f98]",
+"manifestDate":"2011-09-09 16:49:23",
+"manifestYear":"2011",
+"releaseVersion":"1.19",
+"releaseVersionNumber":119,
+"jsonApiVersion": "YYYYMMDD" // added 20120409
+}
+```
+
+Those particular payload fields were chosen only because they're defined
+in `VERSION.h`. We may want to add other information, but nothing comes to
+mind at this time.
+