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IP Listed on PSBL (Passive Spam Block List) Checker
x402
IP Listed on PSBL (Passive Spam Block List) Checker 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 PSBL (psbl.surriel.com) DNS-based blacklist and returns the listed status, return codes, and reason text.
Price / call$0.01
Success—
StatusUnknown
How this service works
Is this IPv4 address listed on psbl (psbl.surriel.com)? Performs the DNSBL query (reversed octets under psbl.surriel.com, 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 answer on whether the IPv4 is listed on PSBL, along with the DNS return codes from the psbl.surriel.com zone and, when available, a human-readable reason text explaining why the IP was listed.
Example use cases
Email deliverability pre-flight check
“Before I send our newsletter campaign from 198.51.100.10, can you check if that IP is on the PSBL blacklist? I need to know if it's listed and why.”
Investigating spam complaint source
“We're getting spam complaints and I think 203.0.113.77 might be the culprit — can you check if it's on the PSBL Passive Spam Block List and give me the return code?”
New mail server reputation audit
“I just set up a mail server at 192.0.2.55 — is that IP currently listed on PSBL at psbl.surriel.com? I want to make sure it's clean before going live.”
Technical details
Endpoint
GEThttps://ip.intel.rallylive.ca/ip/blacklist/psbl?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a precise, single-list answer specifically for PSBL (psbl.surriel.com) — the Passive Spam Block List maintained by Surriel. Prefer it over generic reputation APIs when you specifically need PSBL coverage, want raw DNSBL return codes, and need reason text where published. It is ideal for diagnosing email deliverability issues or auditing sending IPs against this particular blocklist.
Side effects
- Invalid or non-public IPv4 address provided — no meaningful DNSBL result
- DNS resolution failure via Cloudflare DoH — may return error or inconclusive result
- IP not listed returns a clean negative result with no reason text
- PSBL zone temporarily unavailable — lookup may timeout or fail
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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