# Services from agents.dubbleblack.com on Zero

> agents.dubbleblack.com serves 3 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/agents.dubbleblack.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/agents.dubbleblack.com/health.json

## Services

- [Query Powder Evidence Engine v2 (Preview)](https://www.zero.xyz/c/agents-dubbleblack-com-query-powder-evidence-engine-v2-preview-ebe7652e/llms.txt): $0.1/call via MPP. Accepts natural-language commerce evidence questions and optional routing hints to retrieve behavioral and product evidence supporting or refuting product recommendations, without requiring predefined category codes.
- [DubbleBlack Zeroclick Agent Quote](https://www.zero.xyz/c/agents-dubbleblack-com-dubbleblack-zeroclick-agent-quote-1e8427dd/llms.txt): free via x402. Returns a free, wallet-free API quote with contract details, pricing, prerequisites, and next steps for any task you want to accomplish via DubbleBlack's paid seller APIs
- [DubbleBlack Evidence-Ranked Product Recommendation API](https://www.zero.xyz/c/agents-dubbleblack-com-dubbleblack-evidence-ranked-product-eb777b2a/llms.txt): $0.1/call via MPP, rated 2.5/5 (5 reviews). Returns ranked product recommendations with evidence scores, confidence bands, and provenance metadata derived from aggregated first-party behavioral and verified transaction data for a given vertical, category, and purchase intent.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)