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Unable to pass config.json to container-ized server. #622
Description
How do I correctly pass the config file to the prebuilt container? I tried various ways and none worked. Alternatively would love to have a env MCP_PROXY_FULL_ADDRESS that I can define in my compose.
- Added
- CONFIG_PATH=/app/config.json - Added
command: ["npx", "@modelcontextprotocol/inspector", "--config", "/app/config.json"]
services:
mcp-inspect:
ports:
- 127.0.0.1:3008:6274 # client ui
- 127.0.0.1:3009:6277 # mcp server proxy
container_name: mcp-inspect
environment:
- ALLOWED_ORIGINS=https://inspect.mydomain.com,http://127.0.0.1:3008
- CLIENT_PORT=6274
- SERVER_PORT=6277
- HOST=0.0.0.0
- DANGEROUSLY_OMIT_AUTH=true
- MCP_AUTO_OPEN_ENABLED=false
image: ghcr.io/modelcontextprotocol/inspector:latest
restart: unless-stopped
volumes:
- ./config.json:/app/config.jsonHere's my caddyserver caddyfile in case anyone runs across it. Only testing streamable http at the moment...
*.mydomain.com {
tls ...
}
@inspect host inspect.mydomain.com
handle @inspect {
handle /config* {
reverse_proxy localhost:3009
}
handle /health* {
reverse_proxy localhost:3009
}
handle /mcp {
reverse_proxy localhost:3009
}
handle {
reverse_proxy localhost:3008
}
}config.json
{
"mcpServers": {
"default-server": {
"type": "streamable-http",
"url": "https://mcp.mydomain.com/mcp",
"note": "For Streamable HTTP connections, add this URL directly in your MCP Client"
}
},
"MCP_PROXY_FULL_ADDRESS": {
"label": "Inspector Proxy Address",
"description": "Set this if you are running the MCP Inspector Proxy on a non-default address. Example: http://10.1.1.22:5577",
"value": "https://inspect.mydomain.com",
"is_session_item": false
}
}Reacted by davidthing and Josh Bryans
Activity
davidthing commentedon Jul 18, 2025
I suspect that
--configdoesn't work for"type": "streamable-http". It also doesn't work for"sse": #415.wbste commentedon Jul 18, 2025
Have since changed and it's working fine with regular npx, I still can't get it to work with a containerized version of inspector. For now just passing the arguments in the url, but would love a cleaner method.
olaservo commentedon Nov 11, 2025
Closing as not planned and labeling with v2 in case we want to review for next version.