Web's 'Immune Response' to AI Agents Redefines Data Access, Threatens API Moats

The nascent era of autonomous AI agents is facing its first systemic crisis as major websites begin actively blocking their access, creating a foundational conflict over data scraping and API-vs-agent interaction. This digital "immune response" fundamentally challenges the core value proposition of agentic AI from Google, OpenAI, and Meta, which presumes an open and compliant web. While the current focus is on agent-specific user-agent strings, this is merely the opening salvo in a larger war over the economic value of web data, paralleling the earlier tensions around search engine indexing but with far greater stakes for e-commerce and service platforms.