diff --git a/lib/core-callback/sender.js b/lib/core-callback/sender.js
index 3504832..9faa476 100644
--- a/lib/core-callback/sender.js
+++ b/lib/core-callback/sender.js
@@ -2,6 +2,7 @@ const MODULE_NAME = 'CORE-CALLBACK.SENDER';
 
 const axios = require('axios');
 const config = require('komodo-sdk/config');
+const validUrl = require('valid-url');
 const logger = require('tektrans-logger');
 
 const dumper = require('./dumper/sender');
@@ -82,10 +83,10 @@ const sender = async (data, xid, retry) => {
         });
     }
 
-    if (!data.reverse_url) {
-        logger.verbose(`${MODULE_NAME} C4FF18FB: Ignoring missing reverse url`, {
+    if (!data.reverse_url || !validUrl.isWebUri(data.reverse_url)) {
+        logger.verbose(`${MODULE_NAME} C4FF18FB: Ignoring invalid reverse url`, {
             xid,
-            dataFromCore: data,
+            reverseUrl: data && data.reverse_url,
         });
 
         return;
diff --git a/lib/webhook-sender.js b/lib/webhook-sender.js
index 1ca7f55..7c9bfcb 100644
--- a/lib/webhook-sender.js
+++ b/lib/webhook-sender.js
@@ -5,6 +5,7 @@ const moment = require('moment');
 const fs = require('fs');
 const path = require('path');
 const stringify = require('json-stringify-pretty-compact');
+const validUrl = require('valid-url');
 const config = require('komodo-sdk/config');
 const logger = require('tektrans-logger');
 
@@ -18,6 +19,8 @@ const sleepBeforeRetryMs = Number(config.webhook && config.webhook.sleep_before_
 
 const baseDumpDir = path.join('dump', 'webhook-sender');
 
+const DO_WEBHOOK = config.webhook && config.webhook.url && validUrl.isWebUri(config.webhook.url);
+
 if (!fs.existsSync(baseDumpDir)) {
     fs.mkdirSync(baseDumpDir, { recursive: true });
 }
@@ -62,7 +65,7 @@ const dumper = async (xid, webhookType, body) => {
 };
 
 const sender = async (xid, webhookType, body, retry) => {
-    if (!config.webhook || !config.webhook.url) {
+    if (!DO_WEBHOOK) {
         return;
     }
 
diff --git a/package-lock.json b/package-lock.json
index 6adad69..28a8a38 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,8 @@
         "request": "^2.88.0",
         "tektrans-logger": "^1.2.3",
         "uniqid": "^5.3.0",
-        "uuid": "^3.3.3"
+        "uuid": "^3.3.3",
+        "valid-url": "^1.0.9"
       },
       "devDependencies": {
         "eslint": "^6.8.0",
diff --git a/package.json b/package.json
index 0c17ac0..3616302 100644
--- a/package.json
+++ b/package.json
@@ -41,6 +41,7 @@
     "request": "^2.88.0",
     "tektrans-logger": "^1.2.3",
     "uniqid": "^5.3.0",
-    "uuid": "^3.3.3"
+    "uuid": "^3.3.3",
+    "valid-url": "^1.0.9"
   }
 }