Choose between GroupDocs.Signature for Python via .NET (the on-premise SDK), GroupDocs.Signature Cloud (a hosted REST API) and the GroupDocs.Signature MCP server (signing tools for AI agents)....Choose between GroupDocs.Signature for Python via .NET (the on-premise SDK), GroupDocs.Signature Cloud (a hosted REST API) and the GroupDocs.Signature MCP server (signing tools for AI agents).