Hi Vapi team! 👋 Setup * Self-hosted n8n (latest) * A flow that starts with MCP Server Trigger ➜ branches to Google Calendar nodes (create / get / update / delete). * MCP endpoint:

https://<my-domain>/mcp/…

* In Vapi Dashboard → Tools I created an MCP Tool with that URL and attached it to my assistant. What happens 1. When I click Test in the Tool editor I immediately get the warning

Streamable HTTP protocol is not supported in testing yet

. 2. During a real assistant test call the agent says it can’t read my Google Calendar; the logs show the tool list was never fetched. How can I fix this? https://cdn.discordapp.com/attachments/1387504617507786762/1387504617759182848/image.png?ex=685d95df&is=685c445f&hm=46754bf8a6c56b0440cd29d9fe06eef3f7254175e66bf91ae7c9b7741531ea71& https://cdn.discordapp.com/attachments/1387504617507786762/1387504618644312327/image.png?ex=685d95df&is=685c445f&hm=7a1d690e6e6504467c33e23bcbf2f0de97ba22fea1cf74f0d6527106142f9adc& https://cdn.discordapp.com/attachments/1387504617507786762/1387504618921267240/image.png?ex=685d95df&is=685c445f&hm=5bc3f8f70f6cf371afd70e305f16bca259750c16776dfba4b3a50ad30679c75b&

Switching your MCP Tool to use

"protocol": "sse"

or proxying through

mcp-remote

, so tool discovery and Google Calendar actions work properly during real calls..