Capabilities

Can an agent act — WebMCP tools, schema:Action, an MCP server card, OpenAPI, NLWeb, and MCP authorization.

• page-parsed

  WebMCP

  In-page tools (declarative <form toolname> or imperative registerTool) with names, descriptions, schemas.

  ✓ correct ✗ broken
• page-parsed

  schema:Action

  A schema.org potentialAction (e.g. SearchAction) with a target EntryPoint and query-input.

  ✓ correct ✗ broken
• site-wide file

  MCP server card

  A /.well-known/mcp.json advertising a connectable remote MCP endpoint (absolute URL + transport).

  ✓ correct ✗ broken
• site-wide file

  OpenAPI

  A machine-readable OpenAPI 3.x document with callable, uniquely-identified, typed operations.

  ✓ correct ✗ broken
• live probe

  NLWeb

  A natural-language query API: a REST /ask endpoint and an MCP /mcp endpoint advertising an ask tool.

  ✓ correct ✗ broken
• live probe

  MCP authorization

  A protected MCP endpoint's OAuth discovery chain: 401 → protected-resource metadata → authorization-server metadata (PKCE).

  ✓ correct ✗ broken