a2a.server.apps.jsonrpc package

Submodules

a2a.server.apps.jsonrpc.fastapi_app module

class a2a.server.apps.jsonrpc.fastapi_app.A2AFastAPIApplication(agent_card: AgentCard, http_handler: RequestHandler, extended_agent_card: AgentCard | None = None, context_builder: CallContextBuilder | None = None, card_modifier: Callable[[AgentCard], AgentCard] | None = None, extended_card_modifier: Callable[[AgentCard, ServerCallContext], AgentCard] | None = None)

Bases: JSONRPCApplication

A FastAPI application implementing the A2A protocol server endpoints.

Handles incoming JSON-RPC requests, routes them to the appropriate handler methods, and manages response generation including Server-Sent Events (SSE).

add_routes_to_app(app: FastAPI, agent_card_url: str = '/.well-known/agent-card.json', rpc_url: str = '/', extended_agent_card_url: str = '/agent/authenticatedExtendedCard') → None

Adds the routes to the FastAPI application.

Parameters:

  • app – The FastAPI application to add the routes to.

  • agent_card_url – The URL for the agent card endpoint.

  • rpc_url – The URL for the A2A JSON-RPC endpoint.

  • extended_agent_card_url – The URL for the authenticated extended agent card endpoint.

build(agent_card_url: str = '/.well-known/agent-card.json', rpc_url: str = '/', extended_agent_card_url: str = '/agent/authenticatedExtendedCard', **kwargs: Any) → FastAPI

Builds and returns the FastAPI application instance.

Parameters:

  • agent_card_url – The URL for the agent card endpoint.

  • rpc_url – The URL for the A2A JSON-RPC endpoint.

  • extended_agent_card_url – The URL for the authenticated extended agent card endpoint.

  • **kwargs – Additional keyword arguments to pass to the FastAPI constructor.

Returns:

A configured FastAPI application instance.

a2a.server.apps.jsonrpc.jsonrpc_app module

class a2a.server.apps.jsonrpc.jsonrpc_app.CallContextBuilder

Bases: ABC

A class for building ServerCallContexts using the Starlette Request.

abstractmethod build(request: Request) → ServerCallContext

Builds a ServerCallContext from a Starlette Request.

class a2a.server.apps.jsonrpc.jsonrpc_app.DefaultCallContextBuilder

Bases: CallContextBuilder

A default implementation of CallContextBuilder.

build(request: Request) → ServerCallContext

Builds a ServerCallContext from a Starlette Request.

Parameters:

request – The incoming Starlette Request object.

Returns:

A ServerCallContext instance populated with user and state information from the request.

class a2a.server.apps.jsonrpc.jsonrpc_app.JSONRPCApplication(agent_card: AgentCard, http_handler: RequestHandler, extended_agent_card: AgentCard | None = None, context_builder: CallContextBuilder | None = None, card_modifier: Callable[[AgentCard], AgentCard] | None = None, extended_card_modifier: Callable[[AgentCard, ServerCallContext], AgentCard] | None = None)

Bases: ABC

Base class for A2A JSONRPC applications.

Handles incoming JSON-RPC requests, routes them to the appropriate handler methods, and manages response generation including Server-Sent Events (SSE).

abstractmethod build(agent_card_url: str = '/.well-known/agent-card.json', rpc_url: str = '/', extended_agent_card_url: str = '/agent/authenticatedExtendedCard', **kwargs: Any) → FastAPI | Starlette

Builds and returns the JSONRPC application instance.

Parameters:

  • agent_card_url – The URL for the agent card endpoint.

  • rpc_url – The URL for the A2A JSON-RPC endpoint.

  • extended_agent_card_url – The URL for the authenticated extended agent card endpoint.

  • **kwargs – Additional keyword arguments to pass to the FastAPI constructor.

Returns:

A configured JSONRPC application instance.

class a2a.server.apps.jsonrpc.jsonrpc_app.StarletteUserProxy(user: BaseUser)

Bases: User

Adapts the Starlette User class to the A2A user representation.

property is_authenticated: bool

Returns whether the current user is authenticated.

property user_name: str

Returns the user name of the current user.

a2a.server.apps.jsonrpc.starlette_app module

class a2a.server.apps.jsonrpc.starlette_app.A2AStarletteApplication(agent_card: AgentCard, http_handler: RequestHandler, extended_agent_card: AgentCard | None = None, context_builder: CallContextBuilder | None = None, card_modifier: Callable[[AgentCard], AgentCard] | None = None, extended_card_modifier: Callable[[AgentCard, ServerCallContext], AgentCard] | None = None)

Bases: JSONRPCApplication

A Starlette application implementing the A2A protocol server endpoints.

Handles incoming JSON-RPC requests, routes them to the appropriate handler methods, and manages response generation including Server-Sent Events (SSE).

add_routes_to_app(app: Starlette, agent_card_url: str = '/.well-known/agent-card.json', rpc_url: str = '/', extended_agent_card_url: str = '/agent/authenticatedExtendedCard') → None

Adds the routes to the Starlette application.

Parameters:

  • app – The Starlette application to add the routes to.

  • agent_card_url – The URL path for the agent card endpoint.

  • rpc_url – The URL path for the A2A JSON-RPC endpoint (POST requests).

  • extended_agent_card_url – The URL for the authenticated extended agent card endpoint.

build(agent_card_url: str = '/.well-known/agent-card.json', rpc_url: str = '/', extended_agent_card_url: str = '/agent/authenticatedExtendedCard', **kwargs: Any) → Starlette

Builds and returns the Starlette application instance.

Parameters:

  • agent_card_url – The URL path for the agent card endpoint.

  • rpc_url – The URL path for the A2A JSON-RPC endpoint (POST requests).

  • extended_agent_card_url – The URL for the authenticated extended agent card endpoint.

  • **kwargs – Additional keyword arguments to pass to the Starlette constructor.

Returns:

A configured Starlette application instance.

routes(agent_card_url: str = '/.well-known/agent-card.json', rpc_url: str = '/', extended_agent_card_url: str = '/agent/authenticatedExtendedCard') → list[Route]

Returns the Starlette Routes for handling A2A requests.

Parameters:

  • agent_card_url – The URL path for the agent card endpoint.

  • rpc_url – The URL path for the A2A JSON-RPC endpoint (POST requests).

  • extended_agent_card_url – The URL for the authenticated extended agent card endpoint.

Returns:

A list of Starlette Route objects.

Module contents

A2A JSON-RPC Applications.

class a2a.server.apps.jsonrpc.A2AFastAPIApplication(agent_card: AgentCard, http_handler: RequestHandler, extended_agent_card: AgentCard | None = None, context_builder: CallContextBuilder | None = None, card_modifier: Callable[[AgentCard], AgentCard] | None = None, extended_card_modifier: Callable[[AgentCard, ServerCallContext], AgentCard] | None = None)

Bases: JSONRPCApplication

A FastAPI application implementing the A2A protocol server endpoints.

Handles incoming JSON-RPC requests, routes them to the appropriate handler methods, and manages response generation including Server-Sent Events (SSE).

add_routes_to_app(app: FastAPI, agent_card_url: str = '/.well-known/agent-card.json', rpc_url: str = '/', extended_agent_card_url: str = '/agent/authenticatedExtendedCard') → None

Adds the routes to the FastAPI application.

Parameters:

  • app – The FastAPI application to add the routes to.

  • agent_card_url – The URL for the agent card endpoint.

  • rpc_url – The URL for the A2A JSON-RPC endpoint.

  • extended_agent_card_url – The URL for the authenticated extended agent card endpoint.

build(agent_card_url: str = '/.well-known/agent-card.json', rpc_url: str = '/', extended_agent_card_url: str = '/agent/authenticatedExtendedCard', **kwargs: Any) → FastAPI

Builds and returns the FastAPI application instance.

Parameters:

  • agent_card_url – The URL for the agent card endpoint.

  • rpc_url – The URL for the A2A JSON-RPC endpoint.

  • extended_agent_card_url – The URL for the authenticated extended agent card endpoint.

  • **kwargs – Additional keyword arguments to pass to the FastAPI constructor.

Returns:

A configured FastAPI application instance.

class a2a.server.apps.jsonrpc.A2AStarletteApplication(agent_card: AgentCard, http_handler: RequestHandler, extended_agent_card: AgentCard | None = None, context_builder: CallContextBuilder | None = None, card_modifier: Callable[[AgentCard], AgentCard] | None = None, extended_card_modifier: Callable[[AgentCard, ServerCallContext], AgentCard] | None = None)

Bases: JSONRPCApplication

A Starlette application implementing the A2A protocol server endpoints.

Handles incoming JSON-RPC requests, routes them to the appropriate handler methods, and manages response generation including Server-Sent Events (SSE).

add_routes_to_app(app: Starlette, agent_card_url: str = '/.well-known/agent-card.json', rpc_url: str = '/', extended_agent_card_url: str = '/agent/authenticatedExtendedCard') → None

Adds the routes to the Starlette application.

Parameters:

  • app – The Starlette application to add the routes to.

  • agent_card_url – The URL path for the agent card endpoint.

  • rpc_url – The URL path for the A2A JSON-RPC endpoint (POST requests).

  • extended_agent_card_url – The URL for the authenticated extended agent card endpoint.

build(agent_card_url: str = '/.well-known/agent-card.json', rpc_url: str = '/', extended_agent_card_url: str = '/agent/authenticatedExtendedCard', **kwargs: Any) → Starlette

Builds and returns the Starlette application instance.

Parameters:

  • agent_card_url – The URL path for the agent card endpoint.

  • rpc_url – The URL path for the A2A JSON-RPC endpoint (POST requests).

  • extended_agent_card_url – The URL for the authenticated extended agent card endpoint.

  • **kwargs – Additional keyword arguments to pass to the Starlette constructor.

Returns:

A configured Starlette application instance.

routes(agent_card_url: str = '/.well-known/agent-card.json', rpc_url: str = '/', extended_agent_card_url: str = '/agent/authenticatedExtendedCard') → list[Route]

Returns the Starlette Routes for handling A2A requests.

Parameters:

  • agent_card_url – The URL path for the agent card endpoint.

  • rpc_url – The URL path for the A2A JSON-RPC endpoint (POST requests).

  • extended_agent_card_url – The URL for the authenticated extended agent card endpoint.

Returns:

A list of Starlette Route objects.

class a2a.server.apps.jsonrpc.CallContextBuilder

Bases: ABC

A class for building ServerCallContexts using the Starlette Request.

abstractmethod build(request: Request) → ServerCallContext

Builds a ServerCallContext from a Starlette Request.

class a2a.server.apps.jsonrpc.DefaultCallContextBuilder

Bases: CallContextBuilder

A default implementation of CallContextBuilder.

build(request: Request) → ServerCallContext

Builds a ServerCallContext from a Starlette Request.

Parameters:

request – The incoming Starlette Request object.

Returns:

A ServerCallContext instance populated with user and state information from the request.

class a2a.server.apps.jsonrpc.JSONRPCApplication(agent_card: AgentCard, http_handler: RequestHandler, extended_agent_card: AgentCard | None = None, context_builder: CallContextBuilder | None = None, card_modifier: Callable[[AgentCard], AgentCard] | None = None, extended_card_modifier: Callable[[AgentCard, ServerCallContext], AgentCard] | None = None)

Bases: ABC

Base class for A2A JSONRPC applications.

Handles incoming JSON-RPC requests, routes them to the appropriate handler methods, and manages response generation including Server-Sent Events (SSE).

abstractmethod build(agent_card_url: str = '/.well-known/agent-card.json', rpc_url: str = '/', extended_agent_card_url: str = '/agent/authenticatedExtendedCard', **kwargs: Any) → FastAPI | Starlette

Builds and returns the JSONRPC application instance.

Parameters:

  • agent_card_url – The URL for the agent card endpoint.

  • rpc_url – The URL for the A2A JSON-RPC endpoint.

  • extended_agent_card_url – The URL for the authenticated extended agent card endpoint.

  • **kwargs – Additional keyword arguments to pass to the FastAPI constructor.

Returns:

A configured JSONRPC application instance.

class a2a.server.apps.jsonrpc.StarletteUserProxy(user: BaseUser)

Bases: User

Adapts the Starlette User class to the A2A user representation.

property is_authenticated: bool

Returns whether the current user is authenticated.

property user_name: str

Returns the user name of the current user.