Package dev.tachyonmcp.core.server.domain

Class MissingRequiredClientCapabilityException

java.lang.Object

java.lang.Throwable

java.lang.Exception

java.lang.RuntimeException

dev.tachyonmcp.core.server.domain.MissingRequiredClientCapabilityException

All Implemented Interfaces:

Serializable

public final class MissingRequiredClientCapabilityException
extends RuntimeException

Thrown by a handler when processing a request requires a client capability the client did not declare in _meta.io.modelcontextprotocol/clientCapabilities. Mirrors InvalidArgumentException: the feature registry that owns the request/response cycle catches this and maps it to a MissingRequiredClientCapabilityError (-32021, MCP 2026-07-28 SEP-2575), rather than the handler encoding the wire error itself.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
MissingRequiredClientCapabilityException(String message, Map<String,Object> requiredCapabilities)

Method Summary

Modifier and Type	Method	Description
Map<String,Object>	requiredCapabilities()	The missing capabilities, keyed by name (e.g.

Methods inherited from class java.lang.Throwable

addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

MissingRequiredClientCapabilityException

public MissingRequiredClientCapabilityException(String message,
 Map<String,Object> requiredCapabilities)

Method Details

requiredCapabilities

public Map<String,Object> requiredCapabilities()

The missing capabilities, keyed by name (e.g. {"sampling": {}}).