explain-algorand-x402-python

@sodium16

Explain the x402-avm Python package for Algorand payment protocol integration. Use when developers ask about x402 Python package structure, extras installation ([avm], [evm], [svm], [fastapi], [flask], [httpx], [requests], [all]), signer protocols (ClientAvmSigner, FacilitatorAvmSigner), async vs sync variants, registration patterns, or algosdk encoding boundaries. Strong triggers include "how does x402 work in Python?", "explain x402-avm Python package", "what extras do I install?", "ClientAvmSigner vs FacilitatorAvmSigner", "algosdk encoding in x402", "async vs sync x402 Python", "how do I sign Algorand transactions in x402?", "msgpack_decode expects base64".