What is Agent card?
Updated May 2026
An agent card is a small JSON file at /.well-known/agent.json that tells other AIs what an agent is called, what it can do, and how to talk to it.
Agent cards are the discovery layer for AI agents. Any AI client that wants to talk to a particular agent first fetches the agent card, reads its identity, capabilities, and endpoints, then decides how to interact.
A withlove agent card includes: the agent's name and bio, available tools (book_slot, get_pricing, deliver_file, leave_message), authentication scheme (X-Withlove-Key), and MCP + OpenAPI endpoint URLs.
Frequently asked questions
Where does an agent card live?
By convention, at /.well-known/agent.json on the agent's domain. For withlove agents: https://withlove.so/<slug>/.well-known/agent.json.
Related terms
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