# Services from ipv4.fr on Zero

> ipv4.fr serves 11 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/ipv4.fr
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/ipv4.fr/health.json

## Services

- [ipv4.fr Domain Audit API](https://www.zero.xyz/c/ipv4-fr-domain-audit-api-afd0c1b2/llms.txt): $0.05/call via x402. Performs a comprehensive security audit of a domain, checking DNS, TLS/SSL, HTTPS, email configuration (DMARC/SPF), and blacklists, then returns a graded report with actionable findings.
- [ipv4.fr Company Intelligence API](https://www.zero.xyz/c/ipv4-fr-company-intelligence-api-1bb2c222/llms.txt): $0.02/call via x402. Looks up enriched company intelligence for a given domain, returning name, industry, technology stack, social profiles, email/DNS providers, products, and more.
- [ipv4.fr Web Page to Markdown Converter](https://www.zero.xyz/c/ipv4-fr-web-page-to-markdown-converter-5617d2c5/llms.txt): $0.005/call via x402. Fetches a public URL and converts its HTML or plain text content into clean Markdown, with an optional AI-generated summary and key points.
- [ipv4.fr PDF to Markdown Converter](https://www.zero.xyz/c/ipv4-fr-pdf-to-markdown-converter-7fc27841/llms.txt): $0.03/call via x402. Fetches a public PDF file by URL and returns its content as AI-reconstructed Markdown text
- [ipv4.fr IP Blacklist Check API](https://www.zero.xyz/c/ipv4-fr-ip-blacklist-check-api-f439cbba/llms.txt): $0.003/call via x402. Checks whether a given IPv4 address appears on spam/abuse blacklists and returns a clean/listed status with count
- [ipv4.fr Email Validation API](https://www.zero.xyz/c/ipv4-fr-email-validation-api-131c1445/llms.txt): $0.005/call via x402. Validates an email address by checking syntax, disposability, and MX records
- [ipv4.fr HTTP Headers Fetch](https://www.zero.xyz/c/ipv4-fr-http-headers-fetch-e7a4cf0a/llms.txt): $0.003/call via x402. Fetches HTTP response headers from any URL or domain via a server-side GET request
- [ipv4.fr IP Geolocation API](https://www.zero.xyz/c/ipv4-fr-ip-geolocation-api-439b6584/llms.txt): $0.002/call via x402. Returns geolocation data (city, country, ISP) for a given IPv4 address
- [ipv4.fr DNS Lookup API](https://www.zero.xyz/c/ipv4-fr-dns-lookup-api-8f6cddb2/llms.txt): $0.002/call via x402. Performs DNS record lookups for a given domain, returning A, AAAA, MX, TXT, CNAME, NS, and SOA records.
- [ipv4.fr WHOIS Lookup API](https://www.zero.xyz/c/ipv4-fr-whois-lookup-api-c91d0043/llms.txt): $0.003/call via x402. Retrieves WHOIS registration data for a given domain, including registrar, creation date, and ownership details
- [ipv4.fr SSL Certificate Check API](https://www.zero.xyz/c/ipv4-fr-ssl-certificate-check-api-c6d92111/llms.txt): $0.003/call via x402. Checks the SSL/TLS certificate validity and days remaining for a given hostname

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)