UI encyclopedia catalog for agents. Kind lists are 0.01 USDC and specs are 0.02 USDC on Base. The free kinds table is GET /mcp/elements. Request an account at the waitlist or pay per lookup with x402.
| verified | Not yet: listing not claimed with domain proof. |
| trusted | Not yet: needs Live-Tested. |
/api/v1/call/x402.foundations-elements[](https://agentropolis.io/listing/x402.foundations-elements)