Class UnsupportedProtocolVersionErrorData

Namespace

ModelContextProtocol.Protocol

Assembly

ModelContextProtocol.Core.dll

Represents the payload for the UnsupportedProtocolVersion JSON-RPC error.

public sealed class UnsupportedProtocolVersionErrorData

Inheritance

object

UnsupportedProtocolVersionErrorData

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Remarks

Introduced by the 2026-07-28 protocol revision (SEP-2575). When a server receives a request whose declared protocol version it does not implement, it MUST return this error so clients can fall back to a mutually supported version.

Properties

Requested

Gets or sets the protocol version requested by the client.

[JsonPropertyName("requested")]
public required string Requested { get; set; }

Property Value

string

Supported

Gets or sets the protocol version strings that the server supports.

[JsonPropertyName("supported")]
public required IList<string> Supported { get; set; }

Property Value

IList<string>