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IP Listed on s5h DNSBL Check
x402
IP Listed on s5h DNSBL Check is a paid API for AI agents from ip.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-09).
Checks whether a given IPv4 address is listed on the s5h blocklist (all.s5h.net) via a DNSBL query using Cloudflare DoH, returning listed status, return codes, and reason text.
Price / call$0.01
Success—
StatusUnknown
How this service works
Is this IPv4 address listed on s5h (all.s5h.net)? Performs the DNSBL query (reversed octets under all.s5h.net, via Cloudflare DoH) and returns listed yes/no with the return codes and, where the list publishes one, the reason text. One list, one precise answer. $0.01 per lookup.
Output
Returns a yes/no listed status for the queried IPv4 address on the s5h blocklist, along with the DNS return codes from the DNSBL query and, where published by the list, a human-readable reason string explaining why the IP was listed.
Example use cases
Email deliverability pre-send check
“Before we send the campaign, can you check if our outbound mail server IP 203.0.113.45 is currently listed on the s5h DNSBL? I want to know the listed status and any reason given.”
Incident response IP triage
“We're seeing suspicious traffic from 198.51.100.22 — can you quickly check if that IP is on the s5h blacklist and tell me what the return code says?”
Hosting provider reputation audit
“Can you look up whether 45.33.32.156 is flagged on the s5h all.s5h.net blocklist and give me the full details including any reason text?”
Technical details
Endpoint
GEThttps://ip.intel.rallylive.ca/ip/blacklist/s5h?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a precise, single-list check against s5h specifically — ideal when you already know s5h is the relevant blocklist for your use case (e.g. email deliverability pipelines that track s5h listings), or when you want authoritative s5h status with reason codes rather than a broad multi-list reputation score.
Side effects
- Invalid or non-routable IPv4 address provided — query may return no result or an error
- DNS resolution failure via Cloudflare DoH — may return a timeout or network error
- IP not found in the list — returns listed: false with no reason text
- Malformed input (e.g. IPv6 address or hostname instead of IPv4) — likely rejected or returns error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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