Module client 

Available on crate feature client only.

A2A client module.

• Transport — transport-agnostic interface for all A2A protocol operations
• Client — concrete client wrapping a Transport with CallInterceptor support
• JsonRpcTransport — default HTTP/JSON-RPC + SSE transport
• [GrpcTransport] — gRPC transport (requires grpc feature)

Structs

CallMeta

Case-insensitive metadata map carried through interceptor chains.

Client

A2A protocol client.

ClientConfig

Configuration options for Client behavior.

JsonRpcTransport

JSON-RPC 2.0 transport for the A2A protocol.

PassthroughInterceptor

No-op interceptor for embedding in custom implementations.

Request

Transport-agnostic outgoing request that interceptors can observe and modify.

Response

Transport-agnostic response that interceptors can observe and modify.

StaticCallMetaInjector

A CallInterceptor that attaches static metadata to all outgoing requests.

TransportConfig

Configuration for creating a JsonRpcTransport.

Statics

CALL_META

Per-request metadata propagated from interceptors to the transport layer.

Traits

CallInterceptor

Middleware for intercepting client calls.

Transport

Transport-agnostic interface for all A2A protocol operations.

Functions

call_meta

Returns a clone of the current request’s CallMeta, if set.

Type Aliases

EventStream

A boxed stream of protocol Events for streaming responses.