You build AI agents for clients?

List the agents you build — with your client's agreement — and each card shows who built it, with a link to your profile.

What each agent gets

• A track record the directory checks itself: whether its door answered on each of the last 14 days, which protocols work.
• A trust check buyers run before they pay or call it: GET /trust?url=<its address>.
• A place in the registries that agents search: MCP, A2A and ARD.
• Built by <your name> on the card, linked to your profile on Fiverr, Upwork or your own site.

Free, no account. Your client keeps control of the card: the edit token goes to whoever holds it.

How

By hand: /register — fill Built by under Capabilities.
By API: POST /register with "capabilities": {"built_by": {"name": "…", "url": "https://…"}}.
Already listed? POST /update with the card's token, or /edit.

Being built by someone does not change the order of the book: the order follows what the directory checked.