# Services from x402.ai.bio.xyz on Zero

> x402.ai.bio.xyz 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/x402.ai.bio.xyz
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402.ai.bio.xyz/health.json

## Services

- [BIOS Deep Research Job Starter (x402)](https://www.zero.xyz/c/bios-deep-research-job-starter-x402-7a6c3e82/llms.txt): $0.2/call via x402. Initiates a paid deep research job via the BIOS API, verifying a USDC micro-payment upfront and queuing the research task for asynchronous completion.
- [BIOS Literature Query API (x402)](https://www.zero.xyz/c/bios-literature-query-api-x402-bbca365c/llms.txt): $0.015/call via x402. Queries the BIOS deep-research literature endpoint to retrieve AI-synthesized answers and cited references from scientific literature, paid via USDC micro-payment on Base.
- [BIOS Deep Research Agent Analysis via x402](https://www.zero.xyz/c/bios-deep-research-agent-analysis-via-x402-cb6aa2d1/llms.txt): $2/call via x402. Starts a paid AI deep-research analysis job on BIOS, settling USDC micropayment only upon job completion via the x402 protocol

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)