{"uid":"cap_fb-FsrTNT0iZ-lWeOCh6Y","slug":"ip-listed-on-mailspike-dnsbl-b030af05","name":"IP Listed on Mailspike DNSBL","description":"Is this IPv4 address listed on mailspike (bl.mailspike.net)? Performs the DNSBL query (reversed octets under bl.mailspike.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. $0.01 per lookup.","url":"https://ip.intel.rallylive.ca/ip/blacklist/mailspike?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_XH-9N4VZRV0zO0c58RAJm","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 Mailspike blacklist (bl.mailspike.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 the Mailspike blacklist and tell me the return code and reason if it is?","exampleUseCases":[{"title":"Email deliverability troubleshooting","prompt":"Our marketing emails are getting rejected and I think our sending IP 198.51.100.77 might be blacklisted — can you check if it's on the Mailspike blocklist and tell me what the listing reason says?"},{"title":"Pre-send IP reputation check","prompt":"Before we start this email campaign, check if our outbound mail server IP 192.0.2.15 is listed on Mailspike and give me the return code so I know if we need to delist first."},{"title":"Spam source investigation","prompt":"I'm seeing suspicious traffic from 203.0.113.99 — is that IP listed on the Mailspike DNSBL as a known spam sender, and if so what's the reason?"}],"resultDescription":"Returns whether the queried IPv4 address is listed on bl.mailspike.net (yes/no), the DNSBL return code(s) indicating the listing category or severity, and, where available, the human-readable reason text published by Mailspike explaining why the IP is listed.","failureModes":["Invalid or non-routable IPv4 address returns an error","IPv6 addresses are not supported","DNS resolution failure via Cloudflare DoH may cause lookup timeout","IP not listed returns a clean/not-listed response (not an error)","Payment not included or invalid returns HTTP 402"],"whenToPreferThis":"Choose this endpoint when you need a precise, single-list answer specifically from Mailspike (bl.mailspike.net), especially when diagnosing email deliverability issues where Mailspike is implicated or when you want the specific return code and reason text that Mailspike publishes. Prefer this over generic multi-DNSBL checkers when you need attribution to exactly this list.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:41:02.044Z","isFirstParty":false,"canonicalSlug":"ip-listed-on-mailspike-dnsbl-b030af05"}