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ip-listed-on-spamhaus-zen
x402
ip-listed-on-spamhaus-zen is a paid API for AI agents from ip.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).
Checks whether a given IPv4 address is listed on the Spamhaus ZEN DNSBL and returns listed status, return codes, and reason text.
Price / call$0.01
Success—
StatusUnknown
How this service works
Is this IPv4 address listed on spamhaus zen (zen.spamhaus.org)? Performs the DNSBL query (reversed octets under zen.spamhaus.org, 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 Spamhaus ZEN DNSBL, along with the raw DNS return codes and, where available, a human-readable reason text explaining why the IP is listed (e.g., spam source, botnet, hijacked space).
Example use cases
Email sender reputation check
“Before we accept emails from 198.51.100.22, can you check if it's listed on Spamhaus ZEN and tell me its return code and reason?”
Spam source investigation
“We're getting suspicious traffic from 185.220.101.5 — is it on the Spamhaus ZEN blacklist, and if so, what does it say about why?”
IP clearance before whitelisting
“I want to whitelist 91.108.4.10 in our mail server — first check if it's flagged on the Spamhaus ZEN DNSBL for me.”
Technical details
Endpoint
GEThttps://ip.intel.rallylive.ca/ip/blacklist/spamhaus-zen?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, single-list, authoritative check of an IPv4 address against the Spamhaus ZEN DNSBL specifically — ideal when you want precise return codes and reason text from Spamhaus rather than a multi-list aggregate score. Prefer this over generic IP reputation services when Spamhaus ZEN compliance is a specific requirement (e.g., email server filtering, inbound SMTP policy).
Side effects
- Invalid or non-routable IPv4 address returns an error or undefined result
- Network/DoH resolution failure may cause a timeout or error response
- IPv6 addresses are not supported by this endpoint
- Rate limiting or payment failure for $0.01 USDC may prevent lookup
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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