Package io.a2a.spec

Class ContentTypeNotSupportedError

java.lang.Object

java.lang.Throwable

java.lang.Exception

java.lang.RuntimeException

io.a2a.spec.A2AError

io.a2a.spec.A2AProtocolError

io.a2a.spec.ContentTypeNotSupportedError

All Implemented Interfaces:

Event, Serializable

public class ContentTypeNotSupportedError
extends A2AProtocolError

A2A Protocol error indicating incompatibility between requested content types and agent capabilities.

This error is returned when the input or output modes requested by a client are not supported by the agent. Agents declare their supported content types via AgentCard.defaultInputModes() and AgentCard.defaultOutputModes(), and clients can request specific modes via MessageSendConfiguration.

Common scenarios:

• Client requests audio input but agent only supports text
• Client requires video output but agent only produces text and images
• Incompatible combinations of input and output modes

Corresponds to A2A-specific error code -32005.

Usage example:

 if (!agentCard.defaultInputModes().contains(requestedInputMode)) {
     throw new ContentTypeNotSupportedError(
         null,
         "Input mode " + requestedInputMode + " not supported",
         null
     );
 }
 

See Also:

• for agent input capabilities
• for agent output capabilities
• for client content type preferences
• A2A Protocol Specification
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ContentTypeNotSupportedError()
ContentTypeNotSupportedError(@Nullable Integer code, @Nullable String message, @Nullable Object data)	Constructs a content type not supported error.

Method Summary

Methods inherited from class io.a2a.spec.A2AProtocolError

getUrl

Methods inherited from class io.a2a.spec.A2AError

getCode, getData

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

ContentTypeNotSupportedError

public ContentTypeNotSupportedError()

ContentTypeNotSupportedError

public ContentTypeNotSupportedError(@Nullable Integer code,
 @Nullable String message,
 @Nullable Object data)

Constructs a content type not supported error.

Parameters:

code - the error code

message - the error message

data - additional error data