Back to Ecosystem Pulse
ProtocolReferenceA2A
a2a-python
by a2aproject
Official Python SDK implementing the Agent2Agent (A2A) communication protocol
Python
Updated Feb 11, 2026
Share:
Overview
Implements the Agent-to-Agent (A2A) protocol as an official Python SDK for building A2A clients and servers. Provides typed client/server primitives, message schemas, and transport-ready helpers so agents can exchange structured requests, replies, and metadata. Includes utilities for message signing, channel multiplexing, and example integrations to accelerate A2A adoption in Python stacks.
The Value Proposition
As agents coordinate and delegate work among themselves, a shared communication standard is required to reason about provenance and trust. The A2A SDK makes agent-to-agent interactions explicit and auditable, enabling downstream systems to capture the signals needed for Reputation. Until standard serializers and transports exist, it is hard to compare agent behavior or track agent track records across systems — this repo helps fix that by providing a canonical Python reference.
Ideal For
Engineers implementing A2A-compatible agents or services who need a reference Python implementation and interoperable message schema.
Applications
- Connect agent clients and servers with a shared A2A message schema for interoperable communications
- Capture signed message metadata to feed reputation or RepKit-style evaluation pipelines
- Prototype and test agent delegation and handoff flows before production deployment
Works With
openai
Topics
a2aa2a-clienta2a-mcpa2a-protocola2a-serveragent2agentagentsgenerative-ai
Keywords
a2amulti-agent trustagent-to-agent evaluationagent-reputation