I am getting this error esult": "{\"error\": \"Failed to connect to MCP server\"}", callId: f8c4645a-2583-405d-8629-bed4602cf091 Double checked my mcp server and no messages were sent to the server. can confirm it was running fine with no new changes since it was last tested

Thanks for sharing the error and callId. To help narrow down the issue, could you please check the [Vapi status page](https://status.vapi.ai/) to see if there are any reported outages, and let me know if the problem persists after confirming your network and API key setup? This will help determine if it's a platform-wide issue or a local configuration problem. Sources: - [Vapi MCP Server Documentation](https://docs.vapi.ai/sdk/mcp-server) - [Vapi MCP Tool Documentation](https://docs.vapi.ai/tools/mcp) - [Vapi Support](https://docs.vapi.ai/support) - [Vapi Status Page](https://status.vapi.ai/)

I have also been experiencing the same issue recently with different MCP servers. Happened yesterday around the same time and again today. Same as @Raju the error on the logs is: "result": "{\"error\": \"Failed to connect to MCP server\"}" while I was able to test my MCP test tool and it’s working. Here is an example of a call id where I experienced that issue: e30652ec-34fd-4aec-8f7f-235d11d6171f

Same

happening to me right now as well

@COB Tom981 I am facing same issue for same purpose, did you find any solution?

so far no solution.

Maybe they don't have 24/7 support - which is bad news - It's a shame support is lacking

yeah its a shame. i do believe it is a vapi/ghl issue. however, i will share that i did make a fallback case. in the meantime. maybe we can take this as an opportunity to make our solutions bulletproof.

@COB Tom981 If you don’t mind sharing, what’s your fallback option? Direct API call with another tool that the model will use if the first one fails?

well since i’m doing an appointment setter that checks availabilities. If the availability check doesn’t work, i just grab their preferred date and time to book in anyways. then i send it through a review/approve workflow so that the call completes successfully and we can capture the lead.

Great idea for now that is whilst they get their act together

yeah i figured i should probably create the function myself. only problem is that checking availabilities is a bit beyond my skill level especially with GHL calendars. Unless it isn’t as hard as it really seems?

okayy

Nope and Nope!

one guy reported that it fixed for him once he duplicated the assistant

@Shubham Bajaj can you please help wit hthis

same issue here on a custom mcp server that was previously working fine. the vapi assistant suddenly started making POST requests to the SSE endpoint which fail. the mcp testing tool in the vapi dashboard still works, it's just the tool calling from the assistant that broke.

yeah, thats exactly my situation

Hi, we apologize for the long wait. After reviewing the logs for the provided call id, we would like to know how you are conducting your tests for your MCP outside of VAPI. If this MCP issue is widespread, we will flag this for our team for them to take a look.

In my case i can use the mcp tool to check the mcp endpoint. Also have used the mcp inspector tool outside of vapi and it all works. The issue here is that the mcp server doesn't seem to respond when triggered from the tool call

my call ID is fe39ab0e-c900-4c56-8141-41fbcc94c985

We just released an update addressing MCP issues. Please try it and let us know if you encounter any issues

im still experiencing the same issue. call id: e27e18eb-95e0-45ba-8064-be092203cc76

same for me. call id: ef922a01-bdaa-4333-bc55-a955cf027ab5

i think it is fixed for me.

can you check chat id

436c0f60-bb29-457e-b977-5d5de73353e6

the tool is actually calling another tool id not the one configured. It is supposed to call tool id `470e52ab-f7ce-4b80-9234-8e407c0e6efc `but is calling tool id

d6516899-f7db-4b09-89d6-122bffd64a76

Mine is working

It will take some time to get through all of these call ids but I will look into them and get back to each of you.

Hey @Ade @Raju @COB Tom981 @bhargav @robo @miked1756 @GregoD. The issue was on our end regarding connecting to the MCP servers, which we acknowledged and eventually resolved. Therefore, I kindly request you to try again and let me know how it goes for you. If it fails, please share the call IDs.

MCP is working but what about my other open support item to do with get available times not fetching correct timeframes?

Could you please share the support ticket link?

We're checking with the team to see if there are any updates on the GHL calendar tool.

So far it’s been working good for me for the last couple days.

Sounds good. If you encounter any issues, feel free to reach out