An MCP proxy server that aggregates and serves multiple MCP resource servers through a single interface with stdio/sse support
An MCP proxy server that aggregates and serves multiple MCP resource servers through a single interface with stdio/sse support
This server acts as a central hub for Model Context Protocol (MCP) resource servers. It can:
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Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.
| Tool | What it does |
|---|---|
| mcpServers | (Required) An object where each key is a unique identifier for a backend server. |
| name | (Optional) A user-friendly display name for the server (used in Admin UI). |
| active | (Optional, default: true) Set to false to prevent the proxy from connecting to this server. |
| type | (Required) Specifies the transport type. Must be one of "stdio", "sse", or "http". |
| command | (Required if type is "stdio") The command to execute the server process. |
| args | (Optional if type is "stdio") An array of string arguments to pass to the command. |
| env | (Optional if type is "stdio") An object of environment variables (KEY: "value") to set for the server process. These are merged with the proxy server's environment. |
| url | (Required if type is "sse" or "http") The full URL of the backend server's endpoint (e.g., SSE endpoint for "sse", MCP endpoint for "http"). |
| apiKey | (Optional if type is "sse" or "http") An API key to send in the X-Api-Key header when the proxy connects to *this specific backend* server. |
| bearerToken | (Optional if type is "sse" or "http") A token to send in the Authorization: Bearer <token> header when connecting to *this specific backend* server. (If both apiKey and bearerToken are provided, bearerToken generally tak |
| installDirectory | (Optional if type is "stdio") The absolute path where the server *itself* should be installed (e.g., /opt/my-server-files). Used by the Admin UI's installation feature. |
| installCommands | (Optional for Stdio type) An array of shell commands executed sequentially by the Admin UI's installation feature if the target server directory (derived from installDirectory or defaults) does not exist. Commands are ex |
| enabled | (Optional, default: true) Set to false to hide this tool from clients connecting to the proxy. |
| displayName | (Optional) Override the tool's name in client UIs. |
{
"mcpServers": {
"unique-server-key1": {
"type": "stdio",
"name": "My Stdio Server",
"active": true,
"command": "/path/to/server/executable",
"args": ["--port", "1234"],
"env": {
"API_KEY": "server_specific_key"
},
"installDirectory": "/custom_install_path/unique-server-key1",
"installCommands": [
"git clone https://github.com/some/repo unique-server-key1",
"cd unique-server-key1 && npm install && npm run build"
]
},
"another-sse-server": {
"type": "sse",
"name": "My SSE Server",
"active": true,
"url": "http://localhost:8080/sse",
"apiKey": "sse_server_api_key"
},
"http-mcp-server": {
"type": "http",
"name": "My Streamable HTTP Server",
"active": true,
"url": "http://localhost:8081/mcp",
"bearerToken": "some_secure_token_for_http_server"
},
"stdio-default-install": {
"type": "stdio",
"name": "Stdio Server with Default Install Path",
"active": true,
"command": "my_other_server",
"installCommands": ["echo 'Installing to default location...'"]
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| API_KEY | Credential the server authenticates with. | Yes |
| PORT | Configuration value read at startup. | Optional |
| ALLOWED_KEYS | Credential the server authenticates with. | Yes |
| MCP_PROXY_SSE_ALLOWED_TOKENS | Credential the server authenticates with. | Yes |
| ENABLE_ADMIN_UI | Configuration value read at startup. | Optional |
| ADMIN_USERNAME | Configuration value read at startup. | Optional |
| ADMIN_PASSWORD | Configuration value read at startup. | Optional |
| SESSION_SECRET | Credential the server authenticates with. | Yes |
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