# Services from runtime.rootlogos.com on Zero

> runtime.rootlogos.com 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/runtime.rootlogos.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/runtime.rootlogos.com/health.json

## Services

- [Root Logos Evaluation API](https://www.zero.xyz/c/root-logos-evaluation-api-0396ff64/llms.txt): $0.05/call via x402. Evaluates a proposed action, claim, policy, relation, or artifact and returns a privacy-preserving structural judgment with a tamper-evident receipt, without modifying any state.
- [Root Logos Participation Contribution](https://www.zero.xyz/c/root-logos-participation-contribution-d1c75361/llms.txt): $0.05/call via x402. Submits a single bounded contribution (observation, question, relation, correction, or proposal) to the Root Logos constitutional knowledge system for evaluation and preservation.

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)