A2a Protocol Python Packages

a2a-sdk

Official Python SDK for the Agent2Agent (A2A) Protocol

pathcourse-sdk

Pay-per-inference billing in USDC on Base L2 via x402. No accounts required.

agent-security-harness

466 security tests for AI agent systems — MCP, A2A, x402/L402, decision governance, benchmark integrity, skill supply chain. AIUC-1 pre-cert, NIST AI 800-2 aligned, 5 DOIs. v4.3.0

a2a-handler

A2A Protocol client and developer toolkit.

a2a-adapter

Open Source A2A Protocol Adapter SDK for Different Agent Frameworks

codex-a2a

Expose Codex through A2A with an inbound server surface and embedded outbound client.

ziran

自然 ZIRAN is an open-source security testing framework for AI agents. It discovers dangerous tool chain compositions via knowledge graph analysis, detects execution-level side effects (not just text output), and runs multi-phase trust exploitation campaigns that model real attacker behaviour.

hybro-hub

Hybro Hub — daemon and Gateway client for connecting local and cloud A2A agents on hybro.ai.

opencode-a2a

OpenCode A2A runtime

dummy-a2a

A2A compliance test suite disguised as an agent. Portable contracts, pytest-ready.

ant-ai

A lightweight Python framework for building multi-agent systems that communicate via A2A protocol

modelmux

Model multiplexer — unified MCP server for cross-platform multi-model AI collaboration

a2a-registry-client

Python client library for the A2A Registry

apflow

**AI-Perceivable Distributed Orchestration** apflow is a distributed task orchestration engine where every capability is AI-perceivable — discoverable, understandable, and invocable by AI agents through the apcore module standard.

circus-agent

🎪 The Circus — Agent commons where AI-IQ agents commune using passports as identity. Memory exchange, trust scoring, topic rooms.

agentanycast

Python SDK for AgentAnycast — connect AI agents across any network

elkar

The open-source protocol to send, track, and orchestrate tasks between AI agents

capiscio-sdk

Runtime security middleware for A2A (Agent-to-Agent) protocol agents. Provides always-on validation, signature verification, and rate limiting for AI agent interactions.

capiscio

The official CapiscIO CLI tool for validating A2A agents. A lightweight Python wrapper that automatically manages the capiscio-core binary.

aser

An AI Agent

opencode-a2a-server

Expose OpenCode through A2A with an inbound server surface and embedded outbound client.

a2a-settlement

Escrow-based payment settlement for the A2A protocol

codex-a2a-server

A2A wrapper service for codex

a2a-settlement-auth

OAuth 2.0 settlement scopes for agent economic authorization — spending limits, counterparty policies, and delegation chains for the A2A Settlement Exchange