a2a-core: Autonomous Agent-to-Agent Python Client SDK

Dual-tier client library for Autonomous Agent-to-Agent (A2A) micro-utilities featuring x402 V2 gasless micropayments on Base L2.

Features

• Tier 1 (Zero-Cost Local Fast-Path): Strip markdown fences, repair whitespace, and validate JSON schemas locally at $0.00 compute cost.
• Tier 2 (Cloud Booster Fallback): Transparently escalate complex structural drift and SMT logic violations to Cloud Run micro-utilities via x402 V2 micropayments.
• Pydantic v2 Integration: Seamlessly catch and auto-repair ValidationError exceptions in multi-agent workflows (CrewAI, LangGraph, AutoGen).

Installation

pip install a2a-core

Quickstart

from a2a import SchemaHarmonizer

harmonizer = SchemaHarmonizer()
result = harmonizer.harmonize(
    raw_payload='```json\n{"user_id": 123, "balance": 450.5}\n```',
    target_schema={"type": "object", "required": ["user_id", "balance"]}
)
print(result.canonical_ast)
# Output: {'user_id': 123, 'balance': 450.5}