connection issue

### MCP server URL

https://atlas-three-eosin.vercel.app/api/mcp

### Where does the issue occur?

When pressing the Connect button

### Transport used

streamable-http

### Client registration type

My server does not have auth

### SSE only: Does your server return the expected status code for POST requests?

Not sure

### When did you last reproduce this?

Sep 12 12:14:51

### Browser and OS

Chrome

### Describe the issue

error: ofid_c5a760e9ce586b08

### Issue details

```shell
used no sign-n and put my authorization value with Bearer- followed by token but still got the error
```

### Expected behavior

i expected successful connection as the server code is independently confirmed correct (verified directly, multiple times, with real requests)
The official docs confirm your header format (Bearer , with the space) was exactly right
The failure signature matches a known, currently-tracked platform bug precisely

### Logs from your server

```shell
Sep 12 12:14:51.67
POST
401
atlas-three-eosin.vercel.app
/api/mcp
MCP auth attempt: {

receivedLength: 0,

receivedPreview: '(none)',

expectedLength: 36,

startsWithBearer: false

}
```

### Additional context

_No response_