All API endpoints conform to the pattern [PREFIX]LETTER[/ZETTEL-ID], where:
PREFIX
is the URL prefix (default: /), configured via the url-prefix startup configuration,
LETTER
is a single letter that specifies the resource type,
ZETTEL-ID
is an optional 14 digits string that uniquely identify a zettel.
The following letters are currently in use:
Letter Without zettel identifier With zettel identifier Mnemonic
a POST: client authentication  Authenticate
 PUT: renew access token  
x GET: retrieve administrative data  Execute
 POST: execute command  
z GET: list zettel/query zettel GET: retrieve zettel Zettel
 POST: create new zettel PUT: update zettel 
  DELETE: delete zettel 
  MOVE: rename zettel 
The full URL will contain either the http oder https scheme, a host name, and an optional port number.
The API examples will assume the http schema, the local host 127.0.0.1, the default port 23123, and the default empty PREFIX /. Therefore, all URLs in the API documentation will begin with http://127.0.0.1:23123/.