diff --git a/server.go b/server.go
index 2d8fe8e..1690151 100644
--- a/server.go
+++ b/server.go
@@ -6,6 +6,7 @@ import (
 	"encoding/xml"
 	"log"
 	"net/http"
+	"strings"
 	"time"
 )
 
@@ -52,13 +53,24 @@ func AreProcessesUp(processes *[]string, indented bool) func(http.ResponseWriter
 				proclist.AddProcess(proc, err == nil && len(pids) > 0)
 			}
 
-			if hdr := r.Header.Get("Accept"); hdr == "application/xml" {
+			hdr := r.Header.Get("Accept")
+
+			if hdr == "application/xml" {
 				w.Header().Add("Content-Type", "application/xml")
 				enc := xml.NewEncoder(w)
 				if indented {
 					enc.Indent("", "\t")
 				}
 				enc.Encode(proclist)
+			} else if hdr == "text/plain" {
+				w.Header().Add("Content-Type", "text/plain")
+				var s []string
+				for k, v := range *proclist {
+					if v {
+						s = append(s, k)
+					}
+				}
+				w.Write([]byte(strings.Join(s, ",")))
 			} else {
 				w.Header().Add("Content-Type", "application/json")
 				enc := json.NewEncoder(w)