Via GitHub support:
Trying to run the Copilot MCP Server inside Visual Studio Code (version 1.105.1)
Output logs show:
2025-10-30 09:11:28.332 [info] Connection state: Running
2025-10-30 09:11:33.339 [info] Waiting for server to respond to initialize request...
2025-10-30 09:11:38.340 [info] Waiting for server to respond to initialize request...
2025-10-30 09:11:39.112 [info] Connection state: Error Error sending message to https://api.githubcopilot.com/mcp/: TypeError: fetch failed
When testing the same endpoint manually with curl, can successfully establish a proxy tunnel
Despite this, when the MCP server starts, no network traffic leaves the machine (confirmed via network trace).
Reachability
github.com: HTTP 200 - OK
api.github.com: HTTP 200 - OK
proxy.enterprise.githubcopilot.com: HTTP 200 - OK
api.enterprise.githubcopilot.com: HTTP 200 - OK
telemetry.enterprise.githubcopilot.com: HTTP 200 - OK
exthost.log
Via GitHub support:
Trying to run the Copilot MCP Server inside Visual Studio Code (version 1.105.1)
Output logs show:
When testing the same endpoint manually with curl, can successfully establish a proxy tunnel
Despite this, when the MCP server starts, no network traffic leaves the machine (confirmed via network trace).
Reachability
github.com: HTTP 200 - OK
api.github.com: HTTP 200 - OK
proxy.enterprise.githubcopilot.com: HTTP 200 - OK
api.enterprise.githubcopilot.com: HTTP 200 - OK
telemetry.enterprise.githubcopilot.com: HTTP 200 - OK
exthost.log