# DopamineDesk x402 Marketplace

Use this marketplace when an agent needs a current security, due-diligence, public-data, research, or web-intelligence result without opening an account.

## Discover

- Canonical origin: https://ai-data-marketplace-1042299154756.us-central1.run.app
- Billable products: 56
- x402 resources: https://ai-data-marketplace-1042299154756.us-central1.run.app/.well-known/x402
- OpenAPI contract: https://ai-data-marketplace-1042299154756.us-central1.run.app/openapi.json
- Full public catalog: https://ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/catalog
- MCP server card: https://ai-data-marketplace-1042299154756.us-central1.run.app/.well-known/mcp/server-card.json

## Buy safely

1. Select a billable route from the OpenAPI contract.
2. Send the documented request without payment to receive HTTP 402 and the PAYMENT-REQUIRED header.
3. Verify the exact price, network `eip155:8453`, Base USDC asset, and payee `0x8647F7D7a1368a467Ad1FF757fBc2e7167973558`.
4. Sign with a dedicated low-balance buyer wallet and retry with PAYMENT-SIGNATURE.
5. Accept the result only when the response is HTTP 200 and includes PAYMENT-RESPONSE.

The seller-owned discovery documents remain canonical if the advertised payment facilitator changes. Preview-only catalog entries are labeled and are not sold.