Hi Nabeel,
Thanks for the detailed report - and your workaround (removing the endpoint, method, and outer body wrapper) is exactly right for now.
The Composer is still in Alpha, so you may run into rough edges like this while we continue improving it. We're actively working on it and this kind of feedback is genuinely helpful.
We'll look into the invalid JSON generation on our end. In the meantime, the manual workaround should get you unblocked.
Appreciate your patience!
Best,
Shaunak
Vapi Support