{"uid":"cap_7LaNzgjjQGlZIaB9fRy_N","slug":"ip-listed-on-spamhaus-zen-7b822232","name":"ip-listed-on-spamhaus-zen","description":"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. $0.01 per lookup.","url":"https://ip.intel.rallylive.ca/ip/blacklist/spamhaus-zen?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_5Yo95nyQ7Y-kAhwsfdV0n","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a given IPv4 address is listed on the Spamhaus ZEN DNSBL and returns listed status, return codes, and reason text.","exampleAgentPrompt":"Can you check if the IP address 203.0.113.47 is listed on the Spamhaus ZEN blacklist and tell me why it's flagged if it is?","exampleUseCases":[{"title":"Email sender reputation check","prompt":"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?"},{"title":"Spam source investigation","prompt":"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?"},{"title":"IP clearance before whitelisting","prompt":"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."}],"resultDescription":"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).","failureModes":["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"],"whenToPreferThis":"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).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:47:52.442Z","isFirstParty":false,"canonicalSlug":"ip-listed-on-spamhaus-zen-7b822232"}