{"uid":"cap_fNgwH3SNuAMd2IBc9vOk6","slug":"ip-listed-on-barracuda-dnsbl-76b39651","name":"IP Listed on Barracuda DNSBL","description":"Is this IPv4 address listed on barracuda (b.barracudacentral.org)? Performs the DNSBL query (reversed octets under b.barracudacentral.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. $0.01 per lookup.","url":"https://ip.intel.rallylive.ca/ip/blacklist/barracuda?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_350xHijpop73dSnECfjCy","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 Barracuda reputation blocklist (b.barracudacentral.org) via a DNS-based lookup and returns listed/not-listed with return codes and reason text.","exampleAgentPrompt":"Can you check if the IP address 198.51.100.45 is listed on the Barracuda blocklist and tell me the result along with any reason codes returned?","exampleUseCases":[{"title":"Email deliverability reputation check","prompt":"Before we send our newsletter campaign, can you check whether our mail server IP 203.0.113.12 is listed on Barracuda's DNSBL? I need to know if it's blocked and why."},{"title":"Investigating suspicious inbound email sender","prompt":"We received a suspicious email from a server at 185.220.101.47 — can you look that IP up on the Barracuda blocklist and tell me if it's flagged as a spam or malicious source?"},{"title":"Security triage for flagged server IP","prompt":"Our SIEM flagged 91.108.4.200 as potentially malicious — can you run it through the Barracuda reputation database and tell me if it's listed and what the return codes say?"}],"resultDescription":"Returns a yes/no answer on whether the IPv4 address is listed in the Barracuda Central DNSBL (b.barracudacentral.org), along with the DNS return codes and, where available, the reason text published by the list (e.g. 'spam source').","failureModes":["Invalid or malformed IPv4 address — the query will fail or return an error","IPv6 addresses are not supported; only IPv4 lookups are valid","DNS resolution failure via Cloudflare DoH may cause a timeout or error response","Private/reserved IP ranges may return unexpected or no results from the DNSBL","Network connectivity issues between the service and Cloudflare DoH could cause intermittent failures"],"whenToPreferThis":"Choose this endpoint when you need a precise, single-list answer specifically from Barracuda Central (b.barracudacentral.org), which is widely used in email security and spam filtering decisions. It is ideal for checking mail server IPs before campaigns, triaging suspicious senders, or enriching security alerts with Barracuda reputation data. Prefer it over generic multi-list DNSBL tools when you specifically need Barracuda's verdict, and over bulk endpoints when you need a single authoritative lookup with reason codes.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:45:23.124Z","isFirstParty":false,"canonicalSlug":"ip-listed-on-barracuda-dnsbl-76b39651"}