PyPI recent updates for langchain-x402 https://pypi.org/project/langchain-x402/ Recent updates to the Python Package Index for langchain-x402 en 0.2.1 https://pypi.org/project/langchain-x402/0.2.1/ x402 payment protocol integration for LangChain - enable AI agents to pay for APIs with USDC dev@agentrails.io Thu, 19 Feb 2026 10:22:20 GMT 0.2.0 https://pypi.org/project/langchain-x402/0.2.0/ x402 payment protocol integration for LangChain - enable AI agents to pay for APIs with USDC dev@agentrails.io Thu, 19 Feb 2026 10:10:39 GMT 0.1.1 https://pypi.org/project/langchain-x402/0.1.1/ x402 payment protocol integration for LangChain - enable AI agents to pay for APIs with USDC dev@agentrails.io Tue, 17 Feb 2026 09:49:23 GMT 0.1.0 https://pypi.org/project/langchain-x402/0.1.0/ x402 payment protocol integration for LangChain - enable AI agents to pay for APIs with USDC dev@agentrails.io Mon, 02 Feb 2026 10:49:12 GMT