# Services from overwing.ai on Zero

> overwing.ai serves 5 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/overwing.ai
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/overwing.ai/health.json

## Services

- [Overwing Guardrail API](https://www.zero.xyz/c/overwing-guardrail-api-f9a98322/llms.txt): $0.002/call via x402. Checks text for toxicity, PII, confidential leaks, self-harm, and sexual content, returning a verdict and recommended action (block/redact/review/allow) in ~150ms
- [Overwing Text Safety Evaluator](https://www.zero.xyz/c/overwing-text-safety-evaluator-23cd3727/llms.txt): $0.002/call via x402. Scores text for safety violations including personal data, self-harm, and sexual content, returning per-rule verdicts (pass/fail/review) with calibrated confidence scores.
- [Overwing Atlas AI Crawler Lookup](https://www.zero.xyz/c/overwing-atlas-ai-crawler-lookup-abc6e911/llms.txt): $0.001/call via x402. Identifies a User-Agent string against a registry of 241 AI crawlers, fetchers, and browser agents, returning the agent's claimed identity, operator, purpose, verification method, and a trust note.
- [Overwing Atlas Report](https://www.zero.xyz/c/overwing-atlas-report-9a1fa942/llms.txt): $9/call via x402. Fetches a structured report from Overwing Atlas identifying whether a given User-Agent string belongs to a known AI crawler, agent, or fetcher.
- [Overwing Beacon: Agent Reachability Check](https://www.zero.xyz/c/overwing-beacon-agent-reachability-check-19b5a881/llms.txt): $1/call via x402. Checks whether a product or service is reachable and accessible by AI agents

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)