MCP TypeScript SDK (V2) / @modelcontextprotocol/client / client/versionNegotiation

client/versionNegotiation

Interfaces

NegotiationDeps

Defined in: packages/client/src/client/versionNegotiation.ts:350

Properties

capabilities

capabilities: object

Defined in: packages/client/src/client/versionNegotiation.ts:353

elicitation?

optional elicitation?: object

Present if the client supports eliciting user input.

Index Signature

[key: string]: string | number | boolean | {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null; } | (string | ... 4 more ... | null)[] | null; } | string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null; } | (string | ... 4 more ... | null)[] | null[] | null

elicitation.form?

optional form?: object

Index Signature

elicitation.form.applyDefaults?

optional applyDefaults?: boolean

elicitation.url?

optional url?: object

Index Signature

[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null)[] | null; } | string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null; } | (string | ... 4 more ... | null)[] | null[] | null

experimental?

optional experimental?: object

Experimental, non-standard capabilities that the client supports.

Index Signature

[key: string]: object

extensions?

optional extensions?: object

Extensions that the client supports. Keys are extension identifiers (vendor-prefix/extension-name).

Index Signature

[key: string]: object

roots?

optional roots?: object

Present if the client supports listing roots.

Deprecated

Deprecated as of protocol version 2026-07-28 (SEP-2577); remains in the specification for at least twelve months. Migrate to passing paths via tool parameters, resource URIs, or configuration.

roots.listChanged?

optional listChanged?: boolean

Whether the client supports issuing notifications for changes to the roots list.

sampling?

optional sampling?: object

Present if the client supports sampling from an LLM.

Deprecated

Deprecated as of protocol version 2026-07-28 (SEP-2577); remains in the specification for at least twelve months. Migrate to calling LLM provider APIs directly.

sampling.context?

optional context?: object

Present if the client supports context inclusion via includeContext parameter. If not declared, servers SHOULD only use includeContext: "none" (or omit it).

Index Signature

sampling.tools?

optional tools?: object

Present if the client supports tool use via tools and toolChoice parameters.

Index Signature

tasks?

optional tasks?: object

Present if the client supports task creation.

Index Signature

[key: string]: unknown

Deprecated

2025-11-25 wire vocabulary with no SDK runtime; parsed for interoperability only — servers built on this SDK never advertise it.

tasks.cancel?

optional cancel?: object

Present if the client supports cancelling tasks.

Index Signature

tasks.list?

optional list?: object

Present if the client supports listing tasks.

Index Signature

tasks.requests?

optional requests?: object

Capabilities for task creation on specific request types.

Index Signature

[key: string]: unknown

tasks.requests.elicitation?

optional elicitation?: object

Task support for elicitation requests.

Index Signature

[key: string]: unknown

tasks.requests.elicitation.create?

optional create?: object

Index Signature

tasks.requests.sampling?

optional sampling?: object

Task support for sampling requests.

Index Signature

[key: string]: unknown

tasks.requests.sampling.createMessage?

optional createMessage?: object

Index Signature

clientInfo

clientInfo: object

Defined in: packages/client/src/client/versionNegotiation.ts:352

description?

optional description?: string

An optional human-readable description of what this implementation does.

This can be used by clients or servers to provide context about their purpose and capabilities. For example, a server might describe the types of resources or tools it provides, while a client might describe its intended use case.

icons?

optional icons?: object[]

Optional set of sized icons that the client can display in a user interface.

Clients that support rendering icons MUST support at least the following MIME types:

image/png - PNG images (safe, universal compatibility)
image/jpeg (and image/jpg) - JPEG images (safe, universal compatibility)

Clients that support rendering icons SHOULD also support:

image/svg+xml - SVG images (scalable but requires security precautions)
image/webp - WebP images (modern, efficient format)

name

name: string

Intended for programmatic or logical use, but used as a display name in past specs or fallback

title?

optional title?: string

Intended for UI and end-user contexts — optimized to be human-readable and easily understood, even by those unfamiliar with domain-specific terminology.

If not provided, the name should be used for display (except for Tool, where annotations.title should be given precedence over using name, if present).

version

version: string

websiteUrl?

optional websiteUrl?: string

An optional URL of the website for this implementation.

defaultTimeoutMs

defaultTimeoutMs: number

Defined in: packages/client/src/client/versionNegotiation.ts:358

The standard request timeout for this connect (probe inherits it unless probe.timeoutMs overrides).

environment

environment: ProbeEnvironment

Defined in: packages/client/src/client/versionNegotiation.ts:354

transport

transport: Transport

Defined in: packages/client/src/client/versionNegotiation.ts:351

transportKind

transportKind: ProbeTransportKind

Defined in: packages/client/src/client/versionNegotiation.ts:356

The transport class, for the transport-aware timeout verdict (see ProbeTransportKind).

VersionNegotiationOptions

Defined in: packages/client/src/client/versionNegotiation.ts:85

Opt-in protocol version negotiation, configured on ClientOptions.versionNegotiation.

Properties

mode?

optional mode?: VersionNegotiationMode

Defined in: packages/client/src/client/versionNegotiation.ts:89

Default

'legacy'

probe?

optional probe?: VersionNegotiationProbeOptions

Defined in: packages/client/src/client/versionNegotiation.ts:94

Probe timeout/retry policy (only consulted by the probing modes).

VersionNegotiationProbeOptions

Defined in: packages/client/src/client/versionNegotiation.ts:38

Probe policy for 'auto' and pinned negotiation modes.

There is no special probe timeout opinion: the probe inherits the client's STANDARD request timeout unless timeoutMs overrides it.

Properties

maxRetries?

optional maxRetries?: number

Defined in: packages/client/src/client/versionNegotiation.ts:61

Number of times to re-send the probe after a timeout before reaching the timeout verdict. Governs timeout re-sends only — the spec-mandated -32022 corrective continuation (select-and-continue with a mutual version) is a separate negotiation step and is never counted against maxRetries.

Default

0 (no retries)

timeoutMs?

optional timeoutMs?: number

Defined in: packages/client/src/client/versionNegotiation.ts:50

Timeout for the probe exchange, in milliseconds.

The timeout verdict is transport-aware: on stdio, a probe that gets no response within the timeout indicates a legacy server and falls back to the initialize handshake on the same stream; on HTTP, where a deployed server answers and silence means an outage, connect() rejects with the standard typed timeout error instead.

Default

the standard request timeout (DEFAULT_REQUEST_TIMEOUT_MSEC, or the timeout passed to connect())

Type Aliases

NegotiationResult

NegotiationResult = { discover: DiscoverResult; era: "modern"; version: string; } | { era: "legacy"; }

Defined in: packages/client/src/client/versionNegotiation.ts:361

ResolvedVersionNegotiation

ResolvedVersionNegotiation = { kind: "legacy"; } | { fallbackAvailable: boolean; kind: "auto"; modernVersions: string[]; probe: VersionNegotiationProbeOptions; } | { kind: "pin"; probe: VersionNegotiationProbeOptions; version: string; }

Defined in: packages/client/src/client/versionNegotiation.ts:104

A fully resolved negotiation plan for one connect() call.

Union Members

Type Literal

{ kind: "legacy"; }

Type Literal

{ fallbackAvailable: boolean; kind: "auto"; modernVersions: string[]; probe: VersionNegotiationProbeOptions; }

fallbackAvailable

fallbackAvailable: boolean

Whether this client can fall back to the legacy initialize handshake.

kind

kind: "auto"

modernVersions

modernVersions: string[]

Modern versions this client offers, in preference order (never empty).

probe

probe: VersionNegotiationProbeOptions

Type Literal

{ kind: "pin"; probe: VersionNegotiationProbeOptions; version: string; }

VersionNegotiationMode

VersionNegotiationMode = "legacy" | "auto" | { pin: string; }

Defined in: packages/client/src/client/versionNegotiation.ts:79

Negotiation mode:

'legacy' — no negotiation: the plain 2025 connect sequence, byte-identical to a client without this option.
'auto' — probe with server/discover at connect; conservative fallback to the plain legacy initialize handshake on the same connection unless the outcome is definitive modern evidence. Network outage rejects with a typed connect error; a probe timeout falls back to initialize on stdio (a silent server on a local pipe is a legacy server) and rejects with a typed timeout error on HTTP (silence there is an outage).
{ pin: '<version>' } — modern era at exactly the pinned revision: the connect-time server/discover must offer it. No fallback — anything else fails loudly with a typed error.

Functions

buildProbeRequest()

buildProbeRequest(id, protocolVersion, clientInfo, capabilities): object

Defined in: packages/client/src/client/versionNegotiation.ts:293

Build the probe request: server/discover carrying the full per-request _meta envelope.

Parameters

id

string

protocolVersion

string

clientInfo

description?

string = ...

An optional human-readable description of what this implementation does.

icons?

object[] = ...

Optional set of sized icons that the client can display in a user interface.

Clients that support rendering icons MUST support at least the following MIME types:

image/png - PNG images (safe, universal compatibility)
image/jpeg (and image/jpg) - JPEG images (safe, universal compatibility)

Clients that support rendering icons SHOULD also support:

image/svg+xml - SVG images (scalable but requires security precautions)
image/webp - WebP images (modern, efficient format)

name

string = ...

Intended for programmatic or logical use, but used as a display name in past specs or fallback

title?

string = ...

Intended for UI and end-user contexts — optimized to be human-readable and easily understood, even by those unfamiliar with domain-specific terminology.

If not provided, the name should be used for display (except for Tool, where annotations.title should be given precedence over using name, if present).

version

string = ...

websiteUrl?

string = ...

An optional URL of the website for this implementation.

capabilities

elicitation?

{[key: string]: string | number | boolean | {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null; } | (string | ... 4 more ... | null)[] | null; } | string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null; } | (string | ... 4 more ... | null)[] | null[] | null; form?: {[key: string]: string | number | boolean | {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null; } | (string | ... 4 more ... | null)[] | null; } | string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null; } | (string | ... 4 more ... | null)[] | null[] | null; applyDefaults?: boolean; }; url?: {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null)[] | null; } | string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null; } | (string | ... 4 more ... | null)[] | null[] | null; }; } = ...

Present if the client supports eliciting user input.

elicitation.form?

elicitation.form.applyDefaults?

boolean = ...

elicitation.url?

{[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null)[] | null; } | string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null; } | (string | ... 4 more ... | null)[] | null[] | null; } = ...

experimental?

{[key: string]: object; } = ...

Experimental, non-standard capabilities that the client supports.

extensions?

{[key: string]: object; } = ...

Extensions that the client supports. Keys are extension identifiers (vendor-prefix/extension-name).

roots?

{ listChanged?: boolean; } = ...

Present if the client supports listing roots.

Deprecated

Deprecated as of protocol version 2026-07-28 (SEP-2577); remains in the specification for at least twelve months. Migrate to passing paths via tool parameters, resource URIs, or configuration.

roots.listChanged?

boolean = ...

Whether the client supports issuing notifications for changes to the roots list.

sampling?

{ context?: {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null)[] | null; } | string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null; } | (string | ... 4 more ... | null)[] | null[] | null; }; tools?: {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null)[] | null; } | string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null; } | (string | ... 4 more ... | null)[] | null[] | null; }; } = ...

Present if the client supports sampling from an LLM.

Deprecated

Deprecated as of protocol version 2026-07-28 (SEP-2577); remains in the specification for at least twelve months. Migrate to calling LLM provider APIs directly.

sampling.context?

Present if the client supports context inclusion via includeContext parameter. If not declared, servers SHOULD only use includeContext: "none" (or omit it).

sampling.tools?

Present if the client supports tool use via tools and toolChoice parameters.

tasks?

{[key: string]: unknown; cancel?: {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null)[] | null; } | string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null; } | (string | ... 4 more ... | null)[] | null[] | null; }; list?: {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null)[] | null; } | string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null; } | (string | ... 4 more ... | null)[] | null[] | null; }; requests?: {[key: string]: unknown; elicitation?: {[key: string]: unknown; create?: {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null)[] | null; } | ...[] | null; }; }; sampling?: {[key: string]: unknown; createMessage?: {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null)[] | null; } | ...[] | null; }; }; }; } = ...

Present if the client supports task creation.

Deprecated

2025-11-25 wire vocabulary with no SDK runtime; parsed for interoperability only — servers built on this SDK never advertise it.

tasks.cancel?

Present if the client supports cancelling tasks.

tasks.list?

Present if the client supports listing tasks.

tasks.requests?

{[key: string]: unknown; elicitation?: {[key: string]: unknown; create?: {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null)[] | null; } | ...[] | null; }; }; sampling?: {[key: string]: unknown; createMessage?: {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null)[] | null; } | ...[] | null; }; }; } = ...

Capabilities for task creation on specific request types.

tasks.requests.elicitation?

{[key: string]: unknown; create?: {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null)[] | null; } | ...[] | null; }; } = ...

Task support for elicitation requests.

tasks.requests.elicitation.create?

tasks.requests.sampling?

{[key: string]: unknown; createMessage?: {[key: string]: string | number | boolean | { [x: string]: string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | number | boolean | ... | (string | ... 4 more ... | null)[] | null)[] | null)[] | null)[] | null)[] | null; } | ...[] | null; }; } = ...

Task support for sampling requests.

tasks.requests.sampling.createMessage?

Returns

object

id

id: string | number = RequestIdSchema

jsonrpc

jsonrpc: "2.0"

method

method: string

params?

optional params?: object

Index Signature

[key: string]: unknown

params._meta?

optional _meta?: object

See General fields: _meta for notes on _meta usage.

Index Signature

[key: string]: unknown

optional io.modelcontextprotocol/related-task?: object

If specified, this request is related to the provided task.

taskId: string

params._meta.progressToken?

optional progressToken?: string | number

If specified, the caller is requesting out-of-band progress notifications for this request (as represented by notifications/progress). The value of this parameter is an opaque token that will be attached to any subsequent notifications. The receiver is not obligated to provide these notifications.

detectProbeEnvironment()

detectProbeEnvironment(): ProbeEnvironment

Defined in: packages/client/src/client/versionNegotiation.ts:146

Detect the probe environment for the network-failure row — see ProbeEnvironment.

Returns

ProbeEnvironment

detectProbeTransportKind()

detectProbeTransportKind(transport): ProbeTransportKind

Defined in: packages/client/src/client/versionNegotiation.ts:157

Detect the transport class for the transport-aware timeout verdict (see ProbeTransportKind). The stdio child-process transport is recognized structurally (stderr/pid accessors, no instanceof — safe across bundles); everything else is treated like HTTP.

Parameters

transport

Transport

Returns

ProbeTransportKind

negotiateEra()

negotiateEra(negotiation, deps): Promise<NegotiationResult>

Defined in: packages/client/src/client/versionNegotiation.ts:370

Run the negotiation probe state machine on a raw (not yet Protocol-connected) transport. Resolves with the negotiated era; throws typed connect errors. On return the probe window has been released: the transport is started, handler-free, and ready for Protocol.connect() handover. On throw the window is detached and the transport's start is left untouched.

Parameters

negotiation

{ fallbackAvailable: boolean; kind: "auto"; modernVersions: string[]; probe: VersionNegotiationProbeOptions; } | { kind: "pin"; probe: VersionNegotiationProbeOptions; version: string; }

Type Literal

{ fallbackAvailable: boolean; kind: "auto"; modernVersions: string[]; probe: VersionNegotiationProbeOptions; }

fallbackAvailable

boolean

Whether this client can fall back to the legacy initialize handshake.

kind

"auto"

modernVersions

string[]

Modern versions this client offers, in preference order (never empty).

resolveVersionNegotiation()

resolveVersionNegotiation(options, supportedProtocolVersionsOption): ResolvedVersionNegotiation

Defined in: packages/client/src/client/versionNegotiation.ts:121

Resolve the negotiation options into a per-connect plan. The raw (not defaulted) supportedProtocolVersions option supplies the modern offer list; a list without any legacy version makes this a modern-only client (no fallback).

Parameters

options

VersionNegotiationOptions | undefined

supportedProtocolVersionsOption

readonly string[] | undefined

Returns

ResolvedVersionNegotiation

index

Namespaces

migrations

v1-to-v2

mappings

transforms

index

Namespaces

middleware

auth

handlers

middleware

providers

sse

client/versionNegotiation ​

Interfaces ​

NegotiationDeps ​

Properties ​

capabilities ​

elicitation? ​

Index Signature ​

elicitation.form? ​

Index Signature ​

elicitation.form.applyDefaults? ​

elicitation.url? ​

Index Signature ​

experimental? ​

Index Signature ​

extensions? ​

Index Signature ​

roots? ​

Deprecated ​

roots.listChanged? ​

sampling? ​

Deprecated ​

sampling.context? ​

Index Signature ​

sampling.tools? ​

Index Signature ​

tasks? ​

Index Signature ​

Deprecated ​

tasks.cancel? ​

Index Signature ​

tasks.list? ​

Index Signature ​

tasks.requests? ​

Index Signature ​

tasks.requests.elicitation? ​

Index Signature ​

tasks.requests.elicitation.create? ​

Index Signature ​

tasks.requests.sampling? ​

Index Signature ​

tasks.requests.sampling.createMessage? ​

Index Signature ​

clientInfo ​

description? ​

icons? ​

name ​

title? ​

version ​

websiteUrl? ​

defaultTimeoutMs ​

environment ​

transport ​

transportKind ​

VersionNegotiationOptions ​

Properties ​

mode? ​

Default ​

probe? ​

VersionNegotiationProbeOptions ​

Properties ​

maxRetries? ​

Default ​

timeoutMs? ​

Default ​

Type Aliases ​

NegotiationResult ​

client/versionNegotiation

Interfaces

NegotiationDeps

Properties

capabilities

elicitation?

Index Signature

elicitation.form?

Index Signature

elicitation.form.applyDefaults?

elicitation.url?

Index Signature

experimental?

Index Signature

extensions?

Index Signature

roots?

Deprecated

roots.listChanged?

sampling?

Deprecated

sampling.context?

Index Signature

sampling.tools?

Index Signature

tasks?

Index Signature

Deprecated

tasks.cancel?

Index Signature

tasks.list?

Index Signature

tasks.requests?

Index Signature

tasks.requests.elicitation?

Index Signature

tasks.requests.elicitation.create?

Index Signature

tasks.requests.sampling?

Index Signature

tasks.requests.sampling.createMessage?

Index Signature

clientInfo

description?

icons?

name

title?

version

websiteUrl?

defaultTimeoutMs

environment

transport

transportKind

VersionNegotiationOptions

Properties

mode?

Default

probe?

VersionNegotiationProbeOptions

Properties

maxRetries?

Default

timeoutMs?

Default

Type Aliases

NegotiationResult

ResolvedVersionNegotiation

Union Members

Type Literal

Type Literal

fallbackAvailable

kind

modernVersions

probe

Type Literal

VersionNegotiationMode

Functions

buildProbeRequest()

Parameters

id