> ## 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.

# MultiServerOptions

Defined in: [client/multi-server.ts:28](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/multi-server.ts#L28)

## Properties

### defaultOptions?

```ts theme={null}
optional defaultOptions?: ClientDefaultOptions;
```

Defined in: [client/multi-server.ts:32](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/multi-server.ts#L32)

***

### handlers?

```ts theme={null}
optional handlers?: ClientHandlers;
```

Defined in: [client/multi-server.ts:29](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/multi-server.ts#L29)

***

### roots?

```ts theme={null}
optional roots?: string[];
```

Defined in: [client/multi-server.ts:31](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/multi-server.ts#L31)

file:// URIs to advertise to all servers as accessible roots.

***

### versionNegotiation?

```ts theme={null}
optional versionNegotiation?: VersionNegotiationOptions;
```

Defined in: [client/multi-server.ts:43](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/multi-server.ts#L43)

Protocol version negotiation, applied identically to every server in the
config (protocol revision 2026-07-28 and later). See
`ClientOptions.versionNegotiation` on the single-server `Client` — same
semantics, just applied per sub-client here since each connected server
negotiates its own era independently. Default `{ mode: 'auto' }`: each
sub-client probes its server once and falls back to legacy when the
server offers no modern era; `{ mode: 'legacy' }` opts every connection
out of the probe.