diff --git a/anticli.js b/anticli.js
index af3f063..11b701c 100644
--- a/anticli.js
+++ b/anticli.js
@@ -83,6 +83,7 @@ class AntiEtcdCli
         {
             await this.del(cmd.slice(1));
         }
+        process.exit(0);
     }
 
     async get(keys)
@@ -93,7 +94,7 @@ class AntiEtcdCli
         }
         const txn = { success: keys.map(key => ({ request_range: this.options.prefix ? { key: b64(key+'/'), range_end: b64(key+'0') } : { key: b64(key) } })) };
         const res = await this.request('/v3/kv/txn', txn);
-        for (const r of (res||{}).responses||[])
+        for (const r of res.responses||[])
         {
             if (r.response_range)
             {
@@ -119,7 +120,7 @@ class AntiEtcdCli
             value = await fsp.readFile(0, { encoding: 'utf-8' });
         }
         const res = await this.request('/v3/kv/put', { key: b64(key), value: b64(value) });
-        if (res && res.header)
+        if (res.header)
         {
             console.log('OK');
         }
@@ -133,7 +134,7 @@ class AntiEtcdCli
         }
         const txn = { success: keys.map(key => ({ request_delete_range: this.options.prefix ? { key: b64(key+'/'), range_end: b64(key+'0') } : { key: b64(key) } })) };
         const res = await this.request('/v3/kv/txn', txn);
-        for (const r of (res||{}).responses||[])
+        for (const r of res.responses||[])
         {
             if (r.response_delete_range)
             {
@@ -147,16 +148,33 @@ class AntiEtcdCli
         for (const url of this.options.endpoints)
         {
             const cur_url = url.replace(/\/+$/, '')+path;
-            try
+            const res = await POST(cur_url, body, this.options.timeout||1000);
+            let ok = false;
+            if (res.json)
             {
-                return (await POST(cur_url, body, this.options.timeout||1000)).json;
+                if (res.json.error)
+                {
+                    console.error(cur_url+': '+res.json.error);
+                    process.exit(1);
+                }
+                return res.json;
             }
-            catch (e)
+            if (res.body)
             {
-                console.error(cur_url+': '+e.message);
+                console.error(cur_url+': '+res.body);
             }
+            if (res.error)
+            {
+                console.error(cur_url+': '+res.error);
+                if (!res.response || !res.response.statusCode)
+                {
+                    // This URL is unavailable
+                    continue;
+                }
+            }
+            break;
         }
-        return null;
+        process.exit(1);
     }
 }
 
@@ -188,9 +206,9 @@ function POST(url, body, timeout)
             res.on('data', chunk => { res_body += chunk; });
             res.on('end', () =>
             {
-                if (res.statusCode != 200)
+                if (res.statusCode != 200 || !/application\/json/i.exec(res.headers['content-type']))
                 {
-                    ok({ error: res_body, code: res.statusCode });
+                    ok({ response: res, body: res_body, code: res.statusCode });
                     return;
                 }
                 try
@@ -200,7 +218,7 @@ function POST(url, body, timeout)
                 }
                 catch (e)
                 {
-                    ok({ error: e, response: res, body: res_body });
+                    ok({ response: res, error: e, body: res_body });
                 }
             });
         });