# Services from agent-tools-7936.onrender.com on Zero

> agent-tools-7936.onrender.com serves 8 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/agent-tools-7936.onrender.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/agent-tools-7936.onrender.com/health.json

## Services

- [Agent Tools Preflight Checker](https://www.zero.xyz/c/agent-tools-preflight-checker-569a45cb/llms.txt): $0.001/call via x402. Verifies whether an x402 payment-gated endpoint is reachable, correctly configured, and within budget before an agent commits to paying
- [Academic Citation Verifier](https://www.zero.xyz/c/academic-citation-verifier-1330c548/llms.txt): $0.003/call via x402. Verifies academic citations by checking DOI or arXiv ID against primary sources and returns a verdict on whether the paper exists, matches the cited metadata, and has not been retracted.
- [Quote Verifier — agent-tools-7936.onrender.com](https://www.zero.xyz/c/quote-verifier-agent-tools-7936-onrender-com-55086228/llms.txt): $0.005/call via x402. Checks whether a specific claim or quoted statistic is supported by the text at a given source URL or PDF.
- [Agent Tools Web Content Extractor](https://www.zero.xyz/c/agent-tools-web-content-extractor-99cff976/llms.txt): $0.002/call via x402. Fetches and extracts the full text content of any public web URL, returning structured metadata including title, author, publication date, markdown body, and a SHA-256 content hash for verification.
- [Agent Tools Preflight Batch URL Checker](https://www.zero.xyz/c/agent-tools-preflight-batch-url-checker-05811ccc/llms.txt): $0.005/call via x402. Checks a batch of URLs to determine which are live and payable versus dead, helping agents avoid calling broken or inaccessible endpoints
- [Agent Tools Site Audit](https://www.zero.xyz/c/agent-tools-site-audit-7b486a66/llms.txt): $0.01/call via x402. Audits a website URL for AI-agent readiness, returning a grade, score, and actionable fixes
- [x402 Endpoint Auditor](https://www.zero.xyz/c/x402-endpoint-auditor-19a2b595/llms.txt): $0.02/call via x402. Audits an x402-enabled API endpoint and returns a quality grade, score, and actionable improvement suggestions
- [Agent Tools Market Report](https://www.zero.xyz/c/agent-tools-market-report-efa7002e/llms.txt): $0.01/call via x402. Returns aggregate statistics about the x402 micropayment API marketplace, including total listings, payer activity, and underserved niches by tag.

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)