Class MissingRequiredClientCapabilityErrorData

Namespace

ModelContextProtocol.Protocol

Assembly

ModelContextProtocol.Core.dll

Represents the payload for the MissingRequiredClientCapability JSON-RPC error.

public sealed class MissingRequiredClientCapabilityErrorData

Inheritance

object

MissingRequiredClientCapabilityErrorData

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 cannot fulfill a request because the client did not declare a required capability in its per-request _meta/io.modelcontextprotocol/clientCapabilities field, it MUST return this error so clients know which capabilities to advertise on a retry.

Properties

RequiredCapabilities

Gets or sets the client capabilities the server requires to process the request.

[JsonPropertyName("requiredCapabilities")]
public required ClientCapabilities RequiredCapabilities { get; set; }

Property Value

ClientCapabilities