diff --git a/account/external-accounts-api/link-application-to-account.sh b/account/external-accounts-api/link-application-to-account.sh
new file mode 100644
index 0000000..0b36b79
--- /dev/null
+++ b/account/external-accounts-api/link-application-to-account.sh
@@ -0,0 +1,9 @@
+source "../../config.sh"
+source "../../jwt.sh"
+
+curl -X POST "https://api.nexmo.com/beta/chatapp-accounts/$EXTERNAL_ACCOUNT_PROVIDER/$EXTERNAL_ACCOUNT_EXTERNAL_ID/applications" \
+  -H 'Authorization: Bearer '$JWT \
+  -H 'Content-Type: application/json' \
+  -d $'{
+      "application": "messages"
+  }'
\ No newline at end of file
diff --git a/account/external-accounts-api/messenger/create-a-messenger-account.sh b/account/external-accounts-api/messenger/create-a-messenger-account.sh
new file mode 100644
index 0000000..5a7f8fb
--- /dev/null
+++ b/account/external-accounts-api/messenger/create-a-messenger-account.sh
@@ -0,0 +1,10 @@
+source "../../config.sh"
+source "../../jwt.sh"
+
+curl -X POST "https://api.nexmo.com/beta/chatapp-accounts/messenger" \
+  -H 'Authorization: Bearer '$JWT \
+  -H 'Content-Type: application/json' \
+  -d $'{
+      "external_id": "'$EXTERNAL_ACCOUNT_EXTERNAL_ID'",
+      "access_token": "'$MESSENGER_ACCESS_TOKEN'"
+  }'
\ No newline at end of file
diff --git a/account/external-accounts-api/messenger/delete-a-messenger-accoun.sh b/account/external-accounts-api/messenger/delete-a-messenger-accoun.sh
new file mode 100644
index 0000000..a8d3c81
--- /dev/null
+++ b/account/external-accounts-api/messenger/delete-a-messenger-accoun.sh
@@ -0,0 +1,5 @@
+source "../../config.sh"
+source "../../jwt.sh"
+
+curl -X DELETE "https://api.nexmo.com/beta/chatapp-accounts/messenger/$EXTERNAL_ACCOUNT_EXTERNAL_ID" \
+  -H 'Authorization: Bearer '$JWT 
\ No newline at end of file
diff --git a/account/external-accounts-api/messenger/retrive-a-messenger-account.sh b/account/external-accounts-api/messenger/retrive-a-messenger-account.sh
new file mode 100644
index 0000000..d7d6f2b
--- /dev/null
+++ b/account/external-accounts-api/messenger/retrive-a-messenger-account.sh
@@ -0,0 +1,5 @@
+source "../../config.sh"
+source "../../jwt.sh"
+
+curl -X GET "https://api.nexmo.com/beta/chatapp-accounts/messenger/$EXTERNAL_ACCOUNT_EXTERNAL_ID" \
+  -H 'Authorization: Bearer '$JWT 
\ No newline at end of file
diff --git a/account/external-accounts-api/messenger/update-a-messenger-account.sh b/account/external-accounts-api/messenger/update-a-messenger-account.sh
new file mode 100644
index 0000000..d2c2351
--- /dev/null
+++ b/account/external-accounts-api/messenger/update-a-messenger-account.sh
@@ -0,0 +1,10 @@
+source "../../config.sh"
+source "../../jwt.sh"
+
+curl -X PATCH "https://api.nexmo.com/beta/chatapp-accounts/messenger/$EXTERNAL_ACCOUNT_EXTERNAL_ID" \
+  -H 'Authorization: Bearer '$JWT \
+  -H 'Content-Type: application/json' \
+  -d $'{
+      "name": "some_new_name",
+      "access_token": "'$MESSENGER_ACCESS_TOKEN'"
+  }'
\ No newline at end of file
diff --git a/account/external-accounts-api/unlink-application-from-account.sh b/account/external-accounts-api/unlink-application-from-account.sh
new file mode 100644
index 0000000..5b33a1f
--- /dev/null
+++ b/account/external-accounts-api/unlink-application-from-account.sh
@@ -0,0 +1,9 @@
+source "../../config.sh"
+source "../../jwt.sh"
+
+curl -X DELETE "https://api.nexmo.com/beta/chatapp-accounts/$EXTERNAL_ACCOUNT_PROVIDER/$EXTERNAL_ACCOUNT_EXTERNAL_ID/applications/$EXTERNAL_ACCOUNT_APPLICATION_ID" \
+  -H 'Authorization: Bearer '$JWT \
+  -H 'Content-Type: application/json' \
+  -d $'{
+      "application": "messages"
+  }'
\ No newline at end of file
diff --git a/account/external-accounts-api/viber/retrieve-a-viber-account.sh b/account/external-accounts-api/viber/retrieve-a-viber-account.sh
new file mode 100644
index 0000000..037c0de
--- /dev/null
+++ b/account/external-accounts-api/viber/retrieve-a-viber-account.sh
@@ -0,0 +1,5 @@
+source "../../config.sh"
+source "../../jwt.sh"
+
+curl -X GET "https://api.nexmo.com/beta/chatapp-accounts/viber_service_msg/$EXTERNAL_ACCOUNT_EXTERNAL_ID" \
+  -H 'Authorization: Bearer '$JWT 
\ No newline at end of file
diff --git a/account/external-accounts-api/whatsapp/retrieve-a-whatsapp-account.sh b/account/external-accounts-api/whatsapp/retrieve-a-whatsapp-account.sh
new file mode 100644
index 0000000..72f3c29
--- /dev/null
+++ b/account/external-accounts-api/whatsapp/retrieve-a-whatsapp-account.sh
@@ -0,0 +1,5 @@
+source "../../config.sh"
+source "../../jwt.sh"
+
+curl -X GET "https://api.nexmo.com/beta/chatapp-accounts/whatsapp/$EXTERNAL_ACCOUNT_EXTERNAL_ID" \
+  -H 'Authorization: Bearer '$JWT 
\ No newline at end of file
diff --git a/config.sh b/config.sh
index 872cdf1..06c8dd3 100644
--- a/config.sh
+++ b/config.sh
@@ -59,6 +59,12 @@ SUBACCOUNT_KEY=${SUBACCOUNT_KEY:-""}
 AMOUNT=${AMOUNT:-"5"}
 START_DATE=${START_DATE:-"2019-03-02T16:34:49Z"}
 
+# External Accounts API
+EXTERNAL_ACCOUNT_PROVIDER=${EXTERNAL_ACCOUNT_PROVIDER:-""}
+EXTERNAL_ACCOUNT_EXTERNAL_ID=${EXTERNAL_ACCOUNT_EXTERNAL_ID:-""}
+EXTERNAL_ACCOUNT_APPLICATION_ID=${EXTERNAL_ACCOUNT_APPLICATION_ID:-""}
+MESSENGER_ACCESS_TOKEN=${MESSENGER_ACCESS_TOKEN:-""}
+
 # Audit API
 EVENT_UUID=${EVENT_UUID:-""}  # UUID of audit event
 SEARCH_TEXT=${SEARCH_TEXT:-"number"}