> ## Documentation Index
> Fetch the complete documentation index at: https://colin-feat-client-cache-mode.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# McpServerEntry

```ts theme={null}
type McpServerEntry = 
  | {
  auth?:   | BearerAuth
     | OAuth
     | AsyncHeaderAuth
     | string;
  headers?: Record<string, string>;
  url: string;
}
  | {
  args?: string[];
  auth?:   | BearerAuth
     | OAuth
     | AsyncHeaderAuth
     | string;
  command: string;
  env?: Record<string, string>;
};
```

Defined in: [client/transports.ts:77](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/transports.ts#L77)