diff --git a/webtask-zoho.js b/webtask-zoho.js
index ce342b7..40a70a9 100644
--- a/webtask-zoho.js
+++ b/webtask-zoho.js
@@ -5,22 +5,34 @@ const proxy = require('http-proxy-middleware')
 
 const server = express()
 
-const onProxyReq = function (proxyReq, req) {
-    proxyReq.setHeader('Authorization', `Zoho-oauthtoken ${req.webtaskContext.secrets.ZOHO_TOKEN}`)
+const onProxyReqZohoCRM = (proxyReq, req) => {
+    const { ZOHO_CRM_TOKEN } = req.webtaskContext.secrets
+
+    proxyReq.setHeader('Authorization', `Zoho-oauthtoken ${ZOHO_CRM_TOKEN}`)
+}
+
+const onProxyReqZohoCampaigns = (proxyReq, req) => {
+    const { ZOHO_CAMPAIGNS_TOKEN, ZOHO_CAMPAIGNS_LIST_KEY } = req.webtaskContext.secrets
+
+    //
+    // Auth via query params
+    // https://www.zoho.com/campaigns/newhelp/api/contact-subscribe.html
+    //
+    proxyReq.path += `?authtoken=${ZOHO_CAMPAIGNS_TOKEN}&scope=CampaignsAPI&resfmt=JSON&listkey=${ZOHO_CAMPAIGNS_LIST_KEY}&contactinfo={First Name:mac,Last Name:Last Name,Contact Email:jai@zoho.com}` // eslint-disable-line max-len
 }
 
 const configZohoCRM = {
     target: 'https://www.zohoapis.com/crm/v2/',
     pathRewrite: { '^/zoho/crm/': '/' },
     changeOrigin: true,
-    onProxyReq
+    onProxyReq: onProxyReqZohoCRM
 }
 
 const configZohoCampaigns = {
     target: 'https://campaigns.zoho.com/api/',
     pathRewrite: { '^/zoho/campaigns/': '/' },
     changeOrigin: true,
-    onProxyReq
+    onProxyReq: onProxyReqZohoCampaigns
 }
 
 server.use(cors())