Fast rust MCP proxy between stdio and SSE
MCP MCP server exists for a simple reason — assistants are far more useful when they can act on MCP directly instead of describing what you should do. Fast rust MCP proxy between stdio and SSE.
Connect to a remote MCP server and expose it as a local stdio server. Supports both SSE and Streamable HTTP transports with automatic detection.
Once MCP is connected, these are the calls the assistant has available:
Installing — The Installing tool exposed by this serverBuilding — The Building tool exposed by this serverRunning — The Running tool exposed by this serverLogging — Control log verbosity with the RUST_LOG environment variable:The server ships on npm as @modelcontextprotocol/server-everything, so your MCP client can launch it on demand — there is no separate build step. Add the server block to your client's configuration, restart it, and the tools register themselves.
You will need one environment variable: ANOTHER_KEY. The server will not start without them, which is usually why the tools fail to appear on a first run. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.
This sits in the developer tooling group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. MCP's toolset — Installing, Building, Running and 1 more — is a fair guide to whether it matches your workflow. It is maintained by stephenlacy; worth a glance at recent repository activity before you build anything load-bearing on it.
This entry was verified against MCP's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.
| Tool | What it does |
|---|---|
| Installing | The Installing tool exposed by this server. |
| Building | The Building tool exposed by this server. |
| Running | The Running tool exposed by this server. |
| Logging | Control log verbosity with the RUST_LOG environment variable: |
##### Using with Claude or Cursor
```json
{
"mcpServers": {
"my-remote-server": {
"command": "mcp-proxy",
"args": ["http://example.com/mcp/instances_abc123"]
},
"sse-server": {
"command": "mcp-proxy",
"args": ["--transport", "sse", "http://example.com/sse"]
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| ANOTHER_KEY | Credential the server authenticates with. | Yes |
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