Live Directory Index

The first public, neutral registry
for the ARD specification

The public index for the Agentic Resource Discovery spec. Search MCP servers, A2A agents, and skills the way client agents do — by intent, at runtime.

Or explore curated AI capability categories

Developer Tools

Command line discovery

Discover agents, skills, and tools directly from your terminal. Integrate the open-source client library to perform semantic search or crawl catalog pathways locally on your machine.

$npm install -g @ardregistry/cli

ard

$ ard search "weather station"

Searching registry at https://ardregistry.org for "weather station"...

[MCP Server] Weather Info

URN: urn:ai:weather.org:mcp:weather

Source: weather.org

Score: 0%

[AI Skill] Forecast Prompts

URN: urn:ai:meteo.net:skill:forecast

Source: meteo.net

Score: 0%

How does Agentic Resource Discovery work?

ARD is a decentralized standard that lets AI systems dynamically discover and run your tools on the fly, without manual key registration or hardcoded API configs.

Publish Your Catalog

You publish a simple, open file at /.well-known/ai-catalog.json describing your APIs and tools.

Standard format · JSON Schema conformant

Verify Domain Identity

Our registry crawls your catalog and cryptographically checks domain ownership via did:web keys.

Cryptographic verification · Identity match

Agents Run Your Tools

When a user gives an intent query to an AI agent, the agent searches the registry to find, verify, and call your endpoints at runtime.

Zero configuration · Safe dynamic calls