GNU Artanis intergrated the third-party module guile-json. You may use #:mime method to handle JSON:
(get "/json" #:mime 'json (lambda (rc) (let ((j (json (object ("name" "nala") ("age" 15))))) (:mime rc j))))
For example:
(define my-json (json (object ("name" "nala") ("age" 15) ("read_list" (object ("book1" "The interpreter and structure of Artanis") ("book2" "The art of Artanis programming")))))) (scm->json my-json) ; scm->json will print json ;; ==> {"name" : "nala", ;; "age" : 15, ;; "read_list" : {"book2" : "The art of Artanis programming", ;; "book1" : "The interpreter and structure of Artanis"}}
scm->json will print the result directly.
If you need to format json as a string to return to clients, please use scm->json-string.