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IP Listed on SURBL Multi DNSBL
x402
IP Listed on SURBL Multi DNSBL is a paid API for AI agents from ip.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).
Checks whether an IPv4 address is listed on the SURBL multi blocklist (multi.surbl.org) via DNS-based lookup, returning listed status, return codes, and reason text.
Price / call$0.01
Success—
StatusUnknown
How this service works
Is this IPv4 address listed on surbl multi (multi.surbl.org)? Performs the DNSBL query (reversed octets under multi.surbl.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 listing status indicating whether the IPv4 address appears on the SURBL multi blocklist, along with any DNSBL return codes provided by the list and, where available, the human-readable reason text explaining why the IP is listed.
Example use cases
Pre-send email deliverability check
“Before we send out this marketing campaign, can you check if our outgoing mail server IP 198.51.100.10 is listed on the SURBL multi blocklist so we know if we have a deliverability problem?”
Inbound spam filter triage
“This email came from IP 192.0.2.77 — can you look it up on SURBL multi and tell me if it's flagged as a spam source and what reason code comes back?”
Security incident IP vetting
“We're investigating a suspicious connection from 203.0.113.99 — can you check whether that IP is currently listed on the SURBL multi blocklist and what return code it has?”
Technical details
Endpoint
GEThttps://ip.intel.rallylive.ca/ip/blacklist/surbl-multi?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a precise, single-list SURBL multi blocklist check for a specific IPv4 address, especially for email security workflows, spam filtering, or threat intelligence enrichment. Prefer this over generic IP reputation services when you specifically need the SURBL multi list's return codes and reason text. It is a cheap ($0.01/call), fast, per-IP lookup ideal for real-time filtering pipelines or pre-send email checks.
Side effects
- IP address not provided or malformed — query cannot be executed
- DNS resolution failure via Cloudflare DoH — lookup may time out or return an error
- IP not listed — returns listed: false with no return codes
- SURBL multi list temporarily unavailable — may return an error or inconclusive result
- Invalid IPv4 format (e.g. IPv6 or hostname supplied) — request rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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