Struct A2aServerBuilder 

pub struct A2aServerBuilder { /* private fields */ }

Available on crate feature server only.

Builder for configuring an A2A server with custom settings.

Allows customization of the agent card metadata, session service, bind address, and capabilities before building the server app.

Defaults

• Session service: InMemorySessionService
• Bind address: 0.0.0.0:8080
• Agent card name: from agent.name()
• Agent card description: from agent.description()
• Agent card version: "1.0.0"
• Agent card URL: http://localhost:8080
• Streaming: enabled
• Push notifications: disabled

Implementations

impl A2aServerBuilder

pub fn agent(self, agent: Arc<dyn Agent>) -> A2aServerBuilder

Available on crate feature a2a-v1 only.

Set the agent to expose via A2A protocol.

This is required — the builder will return an error if no agent is set.

pub fn session_service( self, service: Arc<dyn SessionService>, ) -> A2aServerBuilder

Available on crate feature a2a-v1 only.

Set a custom session service implementation.

Defaults to InMemorySessionService if not specified.

pub fn bind_addr(self, addr: impl Into<String>) -> A2aServerBuilder

Available on crate feature a2a-v1 only.

Set the bind address for the server.

Defaults to "0.0.0.0:8080".

pub fn agent_card_name(self, name: impl Into<String>) -> A2aServerBuilder

Available on crate feature a2a-v1 only.

Override the agent card name.

Defaults to agent.name().

pub fn agent_card_description(self, desc: impl Into<String>) -> A2aServerBuilder

Available on crate feature a2a-v1 only.

Override the agent card description.

Defaults to agent.description().

pub fn agent_card_version(self, version: impl Into<String>) -> A2aServerBuilder

Available on crate feature a2a-v1 only.

Override the agent card version.

Defaults to "1.0.0".

pub fn agent_card_url(self, url: impl Into<String>) -> A2aServerBuilder

Available on crate feature a2a-v1 only.

Override the agent card URL.

Defaults to "http://localhost:8080".

pub fn streaming(self, enabled: bool) -> A2aServerBuilder

Available on crate feature a2a-v1 only.

Enable or disable streaming support.

Defaults to true.

pub fn push_notifications(self, enabled: bool) -> A2aServerBuilder

Available on crate feature a2a-v1 only.

Enable or disable push notifications.

Defaults to false.

pub fn build(self) -> Result<A2aServerApp, AdkError>

Available on crate feature a2a-v1 only.

Build the configured A2A server application.

Errors

Returns an error if:

• No agent was provided (call .agent(my_agent))
• The agent has an empty name

Example

let server = A2aServer::builder()
    .agent(my_agent)
    .build()?;

Trait Implementations

impl Default for A2aServerBuilder

fn default() -> A2aServerBuilder

Returns the “default value” for a type.