{"uid":"cap_uT0YjUf1yI3FASUXK6-px","slug":"ip-listed-on-interserver-dnsbl-8cd72e7d","name":"IP Listed on InterServer DNSBL","description":"Is this IPv4 address listed on interserver (rbl.interserver.net)? Performs the DNSBL query (reversed octets under rbl.interserver.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. $0.01 per lookup.","url":"https://ip.intel.rallylive.ca/ip/blacklist/interserver?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_YcX-rB5WWInSkc4FvOCAh","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 InterServer DNS blacklist (rbl.interserver.net) and returns the listing status, return codes, and reason text.","exampleAgentPrompt":"Can you check if 198.51.100.42 is listed on the InterServer blacklist (rbl.interserver.net) and tell me the return code and any reason given?","exampleUseCases":[{"title":"Email deliverability pre-flight check","prompt":"Before I send a bulk email campaign, can you verify whether my mail server IP 203.0.113.15 is currently listed on InterServer's DNSBL so I know if it might get blocked?"},{"title":"Investigating incoming spam source","prompt":"I'm getting spam from 198.51.100.77 — can you check if that IP is on the InterServer blacklist and see what reason code comes back?"},{"title":"Automated IP reputation screening","prompt":"For the IP address 192.0.2.100 that just tried to connect to our server, can you do an InterServer DNSBL lookup and tell me whether it's listed and why?"}],"resultDescription":"Returns whether the queried IPv4 address is listed on rbl.interserver.net (yes/no), the DNSBL return code(s), and, where published by the list, a human-readable reason string explaining why the IP was listed.","failureModes":["Invalid or non-public IPv4 address provided — query may fail or return no result","DNS resolution failure via Cloudflare DoH — transient network error","IP not found in the DNSBL — returns listed: false with no reason text","Malformed input (e.g. IPv6 address or hostname instead of IPv4) — may return an error or unexpected result"],"whenToPreferThis":"Choose this endpoint when you need a precise, single-list lookup specifically against the InterServer DNSBL (rbl.interserver.net), rather than a multi-list aggregation. Ideal for targeted spam filtering decisions, email deliverability diagnostics, or automated reputation screening pipelines where you want the exact InterServer listing status with return codes and reason text at low per-query cost.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:41:05.037Z","isFirstParty":false,"canonicalSlug":"ip-listed-on-interserver-dnsbl-8cd72e7d"}