diff --git a/packages/runtime/client/rest/src/index.ts b/packages/runtime/client/rest/src/index.ts
index 7524b8f2..7ed00fab 100644
--- a/packages/runtime/client/rest/src/index.ts
+++ b/packages/runtime/client/rest/src/index.ts
@@ -206,7 +206,13 @@ export function mkRestClient(baseURL: string): RestAPI {
       postTransactionsRequest,
       addressesAndCollaterals
     ) {
-      return Promise.reject();
+      return unsafeTaskEither(
+        Transactions.postViaAxios(axiosInstance)(
+          contractId,
+          postTransactionsRequest,
+          addressesAndCollaterals
+        )
+      );
     },
     healthcheck: () =>
       pipe(