The API key will be sent in the HTTP header, not in the A2A message body The header name will be `X-API-Key` The latest version as of now (2026/06/21) is a2a-sdk==1.1.0. Also, since we will use ...

┌───────────────────────────┐ │ Reflex Web UI │ │ • Configuration editor │ │ • LLM judge profiles │ │ • Golden dataset mgmt │ │ • Evaluation runner │ │ • REST API management ...

Agentic runtimes lock apps to themselves. pyxen flips this: 7 primitives (storage, secrets, identity, tokens, observability, pkg, ipc) with pluggable backends — swap via runtime.json, no code changes.

A2A (Agent-to-Agent) = A "common language" for AI agents to find each other and delegate tasks. It allows AIs from different manufacturers to cooperate. It comes as a set with the similarly named MCP.