{"uid":"cap_JA2IDuPuKeB9erH8hIs9g","slug":"ip-listed-on-blocklist-de-bl-blocklist-de-dnsbl-lookup-a1e685d8","name":"IP Listed on Blocklist.de (bl.blocklist.de) DNSBL Lookup","description":"Is this IPv4 address listed on blocklist de (bl.blocklist.de)? Performs the DNSBL query (reversed octets under bl.blocklist.de, 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. $0.01 per lookup.","url":"https://ip.intel.rallylive.ca/ip/blacklist/blocklist-de?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_vH7ApUjzOSCFZKM8-SqA3","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 bl.blocklist.de by performing a DNSBL query via Cloudflare DoH and returns listed status, return codes, and reason text.","exampleAgentPrompt":"Can you check if the IP address 198.51.100.42 is currently listed on blocklist.de and tell me the reason if it is?","exampleUseCases":[{"title":"Email deliverability pre-send check","prompt":"Before we send out the newsletter campaign, can you check whether our mail server IP 203.0.113.15 is listed on blocklist.de? I need to know if we're blacklisted and why."},{"title":"Incoming connection abuse screening","prompt":"We just got a suspicious connection from 45.33.32.156 — can you check if that IP is on the blocklist.de blacklist and give me the return codes?"},{"title":"Server IP reputation audit","prompt":"I want to know if my new VPS at 198.51.100.77 has a bad reputation — can you look it up on bl.blocklist.de and tell me if it's listed and for what reason?"}],"resultDescription":"Returns a yes/no listed indicator for the queried IPv4 on bl.blocklist.de, along with the raw DNSBL return codes from the DNS response and, where blocklist.de publishes one, a human-readable reason text explaining why the IP was listed.","failureModes":["Invalid or non-routable IPv4 address supplied — query may return an error or no result","IP not listed returns a negative result with no reason text","DNSBL query failure due to transient DNS resolution issues via Cloudflare DoH","IPv6 addresses are not supported — only IPv4 is accepted","Rate limiting or payment failure resulting in HTTP 402 response"],"whenToPreferThis":"Choose this endpoint when you need a fast, precise single-list DNSBL lookup against bl.blocklist.de specifically — ideal for checking IP reputation for abuse, spam, or attack history as tracked by blocklist.de. Prefer this over generic multi-list reputation APIs when you want a definitive yes/no answer with reason text from this particular list, or when you need to triage whether an IP appears on one of the most widely monitored abuse databases.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:46:45.031Z","isFirstParty":false,"canonicalSlug":"ip-listed-on-blocklist-de-bl-blocklist-de-dnsbl-lookup-a1e685d8"}