MultiServerClient - FastMCP TS

Implements

IClient

Constructors

Constructor

new MultiServerClient(config, options?): MultiServerClient;

Defined in: client/multi-server.ts:100

Parameters

config

McpConfig

options?

MultiServerOptions

Returns

MultiServerClient

Methods

[asyncDispose]()

asyncDispose: Promise<void>;

Defined in: client/multi-server.ts:185

Returns

Promise<void>

Implementation of

IClient.[asyncDispose]

callTool()

callTool<TData>(
   name, 
   args?, 
   options?): Promise<CallToolResult<TData>>;

Defined in: client/multi-server.ts:251

Type Parameters

TData

TData = unknown

Parameters

name

string

args?

Record<string, unknown>

options?

CallToolOptions

Returns

Promise<CallToolResult<TData>>

Implementation of

IClient.callTool

callToolRaw()

callToolRaw<TData>(
   name, 
   args?, 
   options?): Promise<CallToolResult<TData>>;

Defined in: client/multi-server.ts:268

Type Parameters

TData

TData = unknown

Parameters

name

string

args?

Record<string, unknown>

options?

CallToolOptions

Returns

Promise<CallToolResult<TData>>

close()

close(): Promise<void>;

Defined in: client/multi-server.ts:171

Returns

Promise<void>

Implementation of

IClient.close

complete()

complete(
   ref, 
   argument, 
   context?, 
   options?): Promise<CompletionResult>;

Defined in: client/multi-server.ts:505

Parameters

ref

| { name: string; type: "ref/prompt"; } | { type: "ref/resource"; uri: string; }

argument

name

string

value

string

context?

arguments?

Record<string, string>

connect()

connect(): Promise<void>;

Defined in: client/multi-server.ts:123

Returns

Promise<void>

Implementation of

IClient.connect

getPrompt()

getPrompt(
   name, 
   args?, 
   options?): Promise<{
[key: string]: unknown;
}>;

Defined in: client/multi-server.ts:386

Parameters

name

string

args?

Record<string, string>

options?

RequestOptions

Returns

Promise<{ [key: string]: unknown; }>

Implementation of

IClient.getPrompt

getProtocolEra()

getProtocolEra(serverName): ProtocolEra | undefined;

Defined in: client/multi-server.ts:215 The protocol era negotiated with a specific named server: 'modern' for 2026-07-28, 'legacy' for 2025-11-25 and earlier, undefined if the server name is unknown or not yet connected. See MultiServerOptions.versionNegotiation — the same mode is requested of every server, but each negotiates (and may land on) its own era independently, so this is necessarily per-server rather than a single client-wide value.

Parameters

serverName

string

Returns

ProtocolEra | undefined

isConnected()

isConnected(): boolean;

Defined in: client/multi-server.ts:189

Returns

boolean

Implementation of

IClient.isConnected

listPrompts()

listPrompts(options?): Promise<{
}[]>;

Defined in: client/multi-server.ts:372

Parameters

options?

RequestOptions

Returns

Promise<{ }[]>

Implementation of

IClient.listPrompts

listResources()

listResources(options?): Promise<{
}[]>;

Defined in: client/multi-server.ts:291

Parameters

options?

RequestOptions

Returns

Promise<{ }[]>

Implementation of

IClient.listResources

listResourceTemplates()

listResourceTemplates(options?): Promise<{
}[]>;

Defined in: client/multi-server.ts:312

Parameters

options?

RequestOptions

Returns

Promise<{ }[]>

Implementation of

IClient.listResourceTemplates

listTools()

listTools(options?): Promise<{
}[]>;

Defined in: client/multi-server.ts:237

Parameters

options?

RequestOptions

Returns

Promise<{ }[]>

Implementation of

IClient.listTools

ping()

ping(options?): Promise<boolean>;

Defined in: client/multi-server.ts:221 See Client.ping’s docs — the same era-routing applies here, per server, since each connected server negotiates its own era independently.

Parameters

options?

RequestOptions

Returns

Promise<boolean>

Implementation of

IClient.ping

readResource()

readResource(uri, options?): Promise<(
  | {
}
  | {
})[]>;

Defined in: client/multi-server.ts:333

Parameters

uri

string

options?

RequestOptions

Returns

Promise<( | { } | { })[]>

Implementation of

IClient.readResource

setLogLevel()

setLogLevel(level, options?): Promise<void>;

Defined in: client/multi-server.ts:562 See Client.setLogLevel’s docs — the same era-routing applies here, per server: legacy sends the real logging/setLevel RPC; modern records the level and threads it into _meta on that server’s subsequent requests via _metaParamsFor, since logging/setLevel is absent from the modern wire registry (SEP-2577).

Parameters

level

LoggingLevel

options?

RequestOptions

Returns

Promise<void>

Implementation of

IClient.setLogLevel

subscribeResource()

subscribeResource(
   uri, 
   handler, 
   options?): Promise<void>;

Defined in: client/multi-server.ts:406 See Client.subscribeResource’s docs — the same era-routing applies here, per server, since each connected server negotiates its own era.

Parameters

uri

string

handler

ResourceUpdateHandler

options?

RequestOptions

Returns

Promise<void>

Implementation of

IClient.subscribeResource

unsubscribeResource()

unsubscribeResource(uri, options?): Promise<void>;

Defined in: client/multi-server.ts:448

Parameters

uri

string

options?

RequestOptions

Returns

Promise<void>

Implementation of

IClient.unsubscribeResource

connect()

static connect(config, options?): Promise<MultiServerClient>;

Defined in: client/multi-server.ts:193

Parameters

config

McpConfig

options?

MultiServerOptions

Returns

Promise<MultiServerClient>

​Implements

​Constructors

​Constructor

​Parameters

config

options?

​Returns

​Methods

​[asyncDispose]()

​Returns

​Implementation of

​callTool()

​Type Parameters

TData

​Parameters

name

args?

options?

​Returns

​Implementation of

​callToolRaw()

​Type Parameters

TData

​Parameters

name

args?

options?

​Returns

​close()

​Returns

​Implementation of

​complete()

​Parameters

ref

argument

name

value

context?

arguments?

options?

​Returns

​Implementation of

​connect()

​Returns

​Implementation of

​getPrompt()

​Parameters

name

args?

options?

​Returns

​Implementation of

​getProtocolEra()

​Parameters

serverName

​Returns

​isConnected()

​Returns

​Implementation of

​listPrompts()

​Parameters

options?

​Returns

​Implementation of

​listResources()

​Parameters

options?

​Returns

​Implementation of

​listResourceTemplates()

​Parameters

options?

​Returns

​Implementation of

​listTools()

​Parameters

options?

​Returns

​Implementation of

​ping()

Implements

Constructors

Constructor

Parameters

Returns

Methods

[asyncDispose]()

Returns

Implementation of

callTool()

Type Parameters

Parameters

Returns

Implementation of

callToolRaw()

Type Parameters

Parameters

Returns

close()

Returns

Implementation of

complete()

Parameters

Returns

Implementation of

connect()

Returns

Implementation of

getPrompt()

Parameters

Returns

Implementation of

getProtocolEra()

Parameters

Returns

isConnected()

Returns

Implementation of

listPrompts()

Parameters

Returns

Implementation of

listResources()

Parameters

Returns

Implementation of

listResourceTemplates()

Parameters

Returns

Implementation of

listTools()

Parameters

Returns

Implementation of

ping()

Parameters

Returns

Implementation of

readResource()

Parameters

Returns

Implementation of

setLogLevel()

Parameters

Returns

Implementation of

subscribeResource()

Parameters

Returns

Implementation of

unsubscribeResource()

Parameters

Returns

Implementation of

connect()

Parameters

Returns