# Services from discovery.hugen.tokyo on Zero

> discovery.hugen.tokyo serves 2 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/discovery.hugen.tokyo
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/discovery.hugen.tokyo/health.json

## Services

- [Hugen Tokyo x402 API Discovery Search](https://www.zero.xyz/c/discovery-hugen-tokyo-8bef7bea/llms.txt): $0.005/call via x402. Search a catalog of 2,400 quality-scored x402 pay-per-call APIs across 24 categories, returning relevance-ranked results with pricing, network, and brokerable metadata
- [MCP Gateway API Key Top-Up](https://www.zero.xyz/c/discovery-hugen-tokyo-58f89c2a/llms.txt): $1/call via x402. Credits $1.00 USD to an MCP Gateway API key balance via a $1.00 USDC payment, enabling the key to call 58 MCP Gateway tools without per-call wallet setup.

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)