Python: feat(python): Add Nory x402 payment plugin

[TheMemeBanker]

Summary

Adds NoryX402Plugin for AI agents to make payments using the x402 HTTP payment protocol via Nory.

New Kernel Functions

Function	Description
get_payment_requirements	Get payment requirements for a resource (amount, supported networks, wallet address)
verify_payment	Verify a signed payment transaction before settlement
settle_payment	Submit a verified payment to the blockchain (~400ms)
lookup_transaction	Check the status of a previously submitted payment
health_check	Check Nory service health and supported networks

Supported Networks

• Solana (mainnet/devnet)
• Base, Polygon, Arbitrum, Optimism, Avalanche, Sei, IoTeX (all mainnet)

Use Cases

AI agents can now:

• Pay for premium API access on-the-fly
• Handle HTTP 402 Payment Required responses automatically
• Make micropayments for AI-to-AI services
• Access paid resources without pre-configured subscriptions

Usage Example

from semantic_kernel import Kernel
from semantic_kernel.core_plugins import NoryX402Plugin

# Create kernel and add plugin
kernel = Kernel()
kernel.add_plugin(NoryX402Plugin(api_key="optional-api-key"), "nory")

# Use in prompts
# {{nory.get_payment_requirements "/api/premium/data" "0.10"}}
# {{nory.settle_payment $payload}}
# {{nory.health_check}}

Documentation

• x402 Protocol Spec
• Nory API

🤖 Generated with Claude Code

[TheMemeBanker]

Hi team! Just following up on this Python plugin PR. The Nory x402 integration would give Semantic Kernel users a clean way to add payment capabilities to their AI agents. Happy to make any adjustments needed to align with SK's plugin patterns and contribution requirements!

[TheMemeBanker]

@microsoft-github-policy-service agree

[TheMemeBanker]

Friendly bump! We've expanded the x402 SDK ecosystem:

New: nory-x402-payer - Payer-side SDK for AI agents

This means Semantic Kernel agents could:

1. Accept payments via this plugin
2. Make payments automatically when calling x402 APIs

The x402 protocol (HTTP 402) is becoming the standard for AI agent payments, with support from Coinbase and Cloudflare's x402 Foundation.

This plugin gives SK users first-mover access to agent commerce. Happy to address any feedback!