OrcaQubits

Create and configure A2A Agent Cards — the discovery document describing an agent's capabilities, skills, authentication, and endpoint.

Build an A2A client — the agent-side code that discovers other agents, sends tasks, handles responses, and manages multi-turn conversations.

Implement A2A error handling — JSON-RPC errors, A2A-specific error codes, task failure states, retry strategies, and graceful degradation.

Implement A2A messages and parts — TextPart, FilePart, DataPart, message roles, metadata, and content negotiation.

Implement A2A multi-turn conversations — input-required state handling, context preservation, iterative refinement, and human-in-the-loop…

Implement A2A push notifications — callback URL registration, notification delivery, and management methods.

Implement A2A SSE streaming — message/stream method, Server-Sent Events, TaskStatusUpdateEvent, TaskArtifactUpdateEvent, and…

Implement A2A task lifecycle management — task creation, state transitions, terminal states, history, and artifacts.

Implement ACP affiliate attribution — privacy-preserving affiliate tracking without cookies using token-based first-touch and last-touch…

Implement ACP capability negotiation — dynamic discovery of mutually supported capabilities, extensions, payment handlers, and…

Implement ACP checkout as an MCP server, exposing checkout operations as MCP tools.

Implement the ACP REST checkout API — create, update, retrieve, complete, and cancel checkout sessions.