Unanswered

Facing issues while using MCP servers

(1) Share

Report

Posted on by AS-18110802-0

Hi Team,

We have deployed mcp servers using fastmcp-python on powerapps and created agents in ms studio which uses this mcp servers We are able to connect only snowflake mcp server with microsoft copliot while trying for others we are facing issues as below:

Can someone please help if you have faced similar issues in the past. any help in this will be very helpful.

Thanks,

Adilkashan.

Categories:

Model context protocol

I have the same question (0)

All responses (2)

Answers (0)

Sort by

chiaraalina 2,348 Super User 2026 Season 1 on at

Like (1)

Report
Copy link

Link copied!

Hi

Which MCP provider or implementation you are using (official or custom-built) when you get that error? If custom, where it is deployed?

I get this error when the MCP server doesn’t return a valid MCP response or when there is an authentication issue (for example, missing or incorrect tokens).

Was this reply helpful? Yes No
AS-18110802-0 7 on at

Like (0)

Report
Copy link

Link copied!

Hi @chiaraalina,

Thanks for your response.

We have developed MCP server in python using fastmcp library (version 2.13.1). Authentication is done using bearer token.

Sample code as below:

from pydantic import AnyHttpUrl

from mcp.server.auth.settings import AuthSettings

from mcp.server.fastmcp import FastMCP

from mcp_servers.auth import SimpleTokenVerifier

# Convert langchain tool to mcp

mcp = FastMCP(

token_verifier=SimpleTokenVerifier(),

auth=AuthSettings(

issuer_url=AnyHttpUrl("https://localhost"),

resource_server_url=AnyHttpUrl("http://localhost"),

required_scopes=['read:data', 'write:data']

),

tools=[

# List of tools here

],

host="0.0.0.0",

port=8000,

streamable_http_path='/mcp',

json_response=True

)

if __name__ == "__main__":

mcp.run(

transport='streamable-http'

)

this is deployed in AWS EKS and you can connection from VS code using public endpoint and bearer token auth. Same also works from "npx mcp inspector".we have created a connecgtion for the MCP server in PowerApps and made sure to have correct bearer token added.PowerApp MCP connection has test feature which also works after adding the connection with bearer token.

Was this reply helpful? Yes No