antispam-api

diff --git a/main.go b/main.go
index ae2dd69c5a7ddb0cfb436273e48d8b4ba596cab3..0abe7e1850b9733f03474d409ffd18234a5e65ec 100644
--- a/main.go
+++ b/main.go
@@ -72,6 +72,56 @@ 		}
 	})
 }
 
+func registerUsernames(router chi.Router) {
+	router.Get("/usernames", func(w http.ResponseWriter, r *http.Request) {
+		jsonFile, err := os.Open("data/usernames.json")
+
+		if err != nil {
+			w.WriteHeader(500)
+			w.Write([]byte("There was some error when opening the raw file"))
+
+			return
+		}
+
+		// defer the closing of our jsonFile so that we can parse it later on
+		defer jsonFile.Close()
+
+		byteValue, _ := ioutil.ReadAll(jsonFile)
+
+		w.Header().Add("Content-Type", "application/json; charset=utf-8")
+		w.WriteHeader(200)
+		w.Write(byteValue)
+	})
+
+	router.Get("/usernames/*", func(w http.ResponseWriter, r *http.Request) {
+		domain := chi.URLParam(r, "*")
+
+		jsonFile, err := os.Open("data/usernames.json")
+
+		if err != nil {
+			w.WriteHeader(500)
+			w.Write([]byte("There was some error when opening the raw file"))
+
+			return
+		}
+
+		defer jsonFile.Close()
+		byteValue, _ := ioutil.ReadAll(jsonFile)
+
+		// XXX: Maybe we could do this only once?
+		var domains []string
+		json.Unmarshal(byteValue, &domains)
+
+		if isOnList(domains, domain) {
+			w.WriteHeader(200)
+			w.Write([]byte(""))
+		} else {
+			w.WriteHeader(404)
+			w.Write([]byte(""))
+		}
+	})
+}
+
 func main() {
 	if len(os.Args) < 2 {
 		fmt.Printf("Usage: %s serve\n", os.Args[0])
@@ -84,6 +134,7 @@ 	router.Use(middleware.RealIP)
 	router.Use(middleware.Logger)
 
 	registerDomains(router)
+	registerUsernames(router)
 
 	addr := ":8121"
 	if len(os.Args) > 2 {