Note that it should be easy to create this as most can be generated from the code.
Look at the examples below to help you:
java docs example (Links to an external site.). - sqlrest
web api example (Links to an external site.) – trello
api (Links to an external site.) - geogig
php docs example (Links to an external site.)– laravel
protocol example (Links to an external site.)– http
js docs example (Links to an external site.).– mozile
node example (Links to an external site.).– socket.io