Mcp not working
# supportt
thecurtis
06/04/2025, 8:26 AMI don’t know what’s going on here. I’m watching a video of a guy using n8n mcp so Vapi agent can send caller an email while they’re on the phone and I’m following it to the letter. it just doesn’t work
v
Vapi Support Bot
06/04/2025, 8:27 AMThanks for sharing your setup. To help you further, could you please specify what exactly happens when you try to use the n8n MCP with your Vapi agent—do you see an error message, or does the email simply not send without any error? Any details or screenshots of the error would be helpful.
Sources:
- [Vapi MCP Tool Documentation](https://docs.vapi.ai/tools/mcp)
- [Vapi MCP Server Documentation](https://docs.vapi.ai/sdk/mcp-server)
t
thecurtis
06/04/2025, 8:28 AMMy agent tells me it’s experiencing a technical error and cannot send the email. It also does not trigger the n8n mcp
k
Kings_big💫
06/04/2025, 8:31 AMEnsure your Vapi assistant prompt asks for the caller’s email, confirm the n8n webhook URL is correctly set in Vapi, and check n8n logs to verify it receives data and the email node is properly configured, most issues stem from prompt clarity or misconfigured workflows.
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thecurtis
06/04/2025, 8:32 AMI’ve done all this
k
Kings_big💫
06/04/2025, 8:42 AMSend your call id
t
thecurtis
06/04/2025, 8:45 AMb15491fa-b985-40f7-821b-2bce1144be6e
thecurtis
06/04/2025, 8:46 AMive even tried self hosting n8n on two separate hosting platforms
k
Kings_big💫
06/04/2025, 8:46 AMLooking into it
s
Shubham Bajaj
06/04/2025, 2:23 PM@thecurtis Hey! To help track down this issue, could you also share:
- The correct call ID
- When exactly this happened (the timestamp)
- What response you expected to get
- What response you actually got instead
This would really help us figure out what went wrong!
t
thecurtis
06/04/2025, 3:39 PMI gave all of this information already
thecurtis
06/04/2025, 3:39 PMBut I’ll try and explain it again
thecurtis
06/04/2025, 3:59 PMIt would be helpful if I could could actually talk to someone. Like zoom call with screen share
thecurtis
06/04/2025, 11:39 PMAlright, so now I’ve got it working “some” of the time. It seems when I switch the model it works for a while then breaks.
I was using the 4o mini first as wasn’t working at all, I switched to 4o and was working for a bit then started breaking again. Then 4.1 and so on. Super interesting
v
Vapi
06/05/2025, 12:48 AMHey can you share the recent non-working call_ids as well?
t
thecurtis
06/05/2025, 3:00 AMI actually think I’ve figured it out! I think I was making edits and testing too quickly for Vapi and n8n to keep up. I left it alone for an hour or so and tried again and it seemed fine.
thecurtis
06/05/2025, 3:02 AMI just made a couple more little tweaks so I’m gonna give it a bit. I did notice a funny little thing though. It’s 8:01pm in my local time zone now, but the agent thinks it’s the next day. In my prompt I have “the time is {{now}} Canada/Vancouver time zone”. Is this correct?
v
Vapi
06/05/2025, 10:42 PM Copy code
the time is {{"now" | date: "%b %d, %Y, %I:%M %p", "America/Vancouver"}} Canada/Vancouver time zone