ARD catalog (ai-catalog)

An Agentic Resource Discovery catalog lets agents list the MCP servers, agents, skills and APIs a domain publishes.

Category: Discoverability
Standard: Emerging; Off by default, turn on in settings

What it checks

The extension fetches /.well-known/ard.json, the path the Agentic Resource Discovery (ARD) specification requires, and then /.well-known/ai-catalog.json, a widely deployed alias. It uses the first one that returns a non-empty JSON body, and checks that the document parses and has a top-level entries array.

Results

Status	When
Pass	A catalog was found with an `entries` array
Warn	A catalog was served, but it is not valid JSON or has no `entries` array
N/A	No catalog was found at either path

How to fix

If your domain publishes MCP servers, agents, skills or APIs, list them in a JSON document at /.well-known/ard.json. See agenticresourcediscovery.org for the full format.

{
  "entries": [
    {
      "identifier": "urn:air:example.com:mcp:main",
      "displayName": "Example MCP server",
      "type": "application/json",
      "url": "https://example.com/.well-known/mcp/server-card.json"
    }
  ]
}

Once the catalog exists, ARD entry validity checks each entry and ARD trust manifest checks who they are bound to.