{"uid":"cap_5lMEVEV7Z__j8AAytqyrB","slug":"ip-listed-on-0spam-c4aa6146","name":"ip-listed-on-0spam","description":"Is this IPv4 address listed on 0spam (bl.0spam.org)? Performs the DNSBL query (reversed octets under bl.0spam.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. $0.01 per lookup.","url":"https://ip.intel.rallylive.ca/ip/blacklist/0spam?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_L2v-lr7jz61advqkmpfuZ","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 0spam DNSBL (bl.0spam.org) and returns listed status, return codes, and reason text.","exampleAgentPrompt":"Is the IP address 203.0.113.42 listed on the 0spam blacklist — give me the listing status and any reason code?","exampleUseCases":[{"title":"Email sender spam reputation check","prompt":"Before I accept this incoming email, can you check if the sending IP 198.51.100.77 is listed on the 0spam DNSBL and tell me whether it's flagged as a spammer?"},{"title":"Automated inbound mail filtering","prompt":"I'm getting email from 192.0.2.15 — is that IP on the 0spam blacklist? I need the yes/no answer and any reason text the list provides."},{"title":"IP reputation audit for deliverability","prompt":"We're troubleshooting email deliverability issues — can you check if our outbound mail server at 203.0.113.99 shows up on the 0spam block list?"}],"resultDescription":"Returns a yes/no listed status for the queried IPv4 address on bl.0spam.org, along with the DNSBL return codes and, where published by the list, a human-readable reason text explaining why the IP is listed.","failureModes":["Invalid or non-routable IPv4 address provided","DNS resolution failure via Cloudflare DoH","0spam DNSBL service unavailable or timeout","IPv6 address supplied instead of IPv4 (unsupported)","Malformed IP format causing query failure"],"whenToPreferThis":"Choose this endpoint when you need a precise, single-list DNSBL check specifically against 0spam (bl.0spam.org) with reason text included. Prefer it over generic multi-list reputation services when you need a definitive, auditable answer from 0spam alone — for example in email filtering pipelines, deliverability debugging, or compliance logging where 0spam listing status is the specific criterion.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:41:34.104Z","isFirstParty":false,"canonicalSlug":"ip-listed-on-0spam-c4aa6146"}