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IP Listed on UCEPROTECT Level 3 (dnsbl-3.uceprotect.net)
x402
IP Listed on UCEPROTECT Level 3 (dnsbl-3.uceprotect.net) 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 UCEPROTECT Level 3 DNSBL (dnsbl-3.uceprotect.net) and returns the listing status, return codes, and reason text.
Price / call$0.01
Success—
StatusUnknown
How this service works
Is this IPv4 address listed on uceprotect 3 (dnsbl-3.uceprotect.net)? Performs the DNSBL query (reversed octets under dnsbl-3.uceprotect.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 whether the queried IPv4 address is listed on UCEPROTECT Level 3 (dnsbl-3.uceprotect.net), along with the DNS return codes from the lookup and, where published by the list, a human-readable reason explaining why the IP or its network is listed.
Example use cases
Pre-send email deliverability check
“Before I send out this email campaign, check if our sending IP 203.0.113.12 is listed on the UCEPROTECT-3 blacklist — I need to know if we're blocked and what the reason is.”
Investigating blocked inbound mail
“We're having trouble receiving mail from a partner — their server IP is 198.51.100.88. Can you check if it's listed on UCEPROTECT Level 3 and give me the return code and any reason text?”
IP reputation audit for new server
“I just provisioned a new server at 192.0.2.77 and want to make sure it's clean — can you check if it's on the UCEPROTECT-3 DNSBL before I start sending mail from it?”
Technical details
Endpoint
GEThttps://ip.intel.rallylive.ca/ip/blacklist/uceprotect-3?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need to check the UCEPROTECT Level 3 list, which lists entire ASNs or netblocks rather than individual IPs — making it relevant for diagnosing ISP-level or network-level spam reputation issues. Prefer this over UCEPROTECT Level 1 or 2 endpoints when investigating why a whole network range is blocked. It provides a single authoritative answer for exactly one list, making it suitable for targeted DNSBL checks rather than broad reputation aggregation.
Side effects
- Invalid or non-public IPv4 address provided — no meaningful DNSBL result
- DNS resolution failure via Cloudflare DoH — lookup cannot be completed
- IP is not listed — returns listed: false with no return codes or reason
- UCEPROTECT-3 service unavailable or unreachable — timeout or error response
- Malformed input (e.g. IPv6 address, domain name instead of IP) — request rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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