NLWeb (Natural Language Web) is a Microsoft-driven proposed standard for declaring website capabilities to agents in natural-language form. Sites publish an NLWeb descriptor at /.well-known/nlweb describing what the site does, what queries it can answer, and how agents can interact.
Agents need a way to discover what a site can do before they engage with it. NLWeb provides that discovery layer in natural language, making it more accessible than structured-data-only approaches.
Microsoft is the primary champion. Adoption is early. The standards landscape is competing with MCP and WebMCP for the agent-discovery slot. All three may coexist.
Publish /.well-known/nlweb with the descriptor. The Spacemen Digital AI Agent Readiness Check tests for NLWeb as one of the frontier-standards checks.
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