{"uid":"cap_ESMBGJvW4mK6K1zMUUlA_","slug":"ip-listed-on-uceprotect-1-3bd331f0","name":"ip-listed-on-uceprotect-1","description":"Is this IPv4 address listed on uceprotect 1 (dnsbl-1.uceprotect.net)? Performs the DNSBL query (reversed octets under dnsbl-1.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. $0.01 per lookup.","url":"https://ip.intel.rallylive.ca/ip/blacklist/uceprotect-1?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_yGPqPBdhNnKKjy_S0Wgnf","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 an IPv4 address is listed on the UCEPROTECT Level 1 DNSBL (dnsbl-1.uceprotect.net) and returns the listing status, return codes, and reason text.","exampleAgentPrompt":"Can you check if the IP address 203.0.113.42 is listed on UCEPROTECT Level 1 (dnsbl-1.uceprotect.net) and tell me the reason if it is?","exampleUseCases":[{"title":"Email deliverability troubleshooting","prompt":"My outbound emails keep getting rejected — can you check whether 198.51.100.17 is on the UCEPROTECT Level 1 blacklist and give me the reason code if it's listed?"},{"title":"New server IP reputation check","prompt":"Before I start sending email from my new server at 203.0.113.88, can you verify it's not listed on UCEPROTECT-1?"},{"title":"Automated IP screening before onboarding","prompt":"I'm onboarding a new customer whose mail server IP is 192.0.2.55 — can you check if it's flagged on the UCEPROTECT Level 1 DNSBL so I know whether to flag the account?"}],"resultDescription":"Returns a yes/no listing status for the queried IPv4 address on UCEPROTECT Level 1 (dnsbl-1.uceprotect.net), along with the DNS return codes from the DNSBL query and, where available, the human-readable reason text explaining why the IP was listed.","failureModes":["Invalid or non-routable IPv4 address returns an error","DNS resolution failure via Cloudflare DoH may cause lookup to fail","IP not found in DNSBL returns listed=false with no reason text","IPv6 addresses are not supported (IPv4 only)","Timeout if UCEPROTECT nameservers are slow or unavailable"],"whenToPreferThis":"Choose this endpoint when you need a precise, single-list answer for UCEPROTECT Level 1 specifically — the most granular per-IP UCEPROTECT tier. Use it for diagnosing email delivery rejections attributed to dnsbl-1.uceprotect.net, pre-flight checks before sending email from an IP, or building automated IP reputation pipelines where UCEPROTECT-1 is the relevant rejection criterion.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:41:44.997Z","isFirstParty":false,"canonicalSlug":"ip-listed-on-uceprotect-1-3bd331f0"}