{"uid":"cap_Ob2NDRFeej-PVmzVAHcJ7","slug":"cloudpulsepoint-dnsbl-blacklist-checker-7da85062","name":"cloudPulsePoint DNSBL Blacklist Checker","description":"Resolve the site's IP and check it against 15 major DNSBL spam/abuse blacklists. Use before sending mail from, or trusting, a host. WARN = listed on 1–2 lists; DOWN = listed on 3 or more.","url":"https://x402.cloudpulsepoint.com/agent/check/blacklist","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","description":"Full http(s) URL of the site to check, e.g. \"https://example.com\". Must resolve to a public address — private, loopback, link-local, and cloud-metadata targets are rejected with HTTP 400 before any payment."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.03","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":"$0.03/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_2h5ixOS6Y7b0TqKSrpjUv","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.03","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Resolves a site's IP address and checks it against 15 major DNS-based spam/abuse blacklists, returning a severity rating (OK, WARN, or DOWN) based on how many lists it appears on.","exampleAgentPrompt":"Before I start sending emails from my server at https://mail.mycompany.com, can you check its IP against the major spam and abuse blacklists to see if it's listed anywhere?","exampleUseCases":[{"title":"Pre-send email server reputation check","prompt":"I'm about to set up email campaigns from https://newsletters.mybrand.com — can you check its IP against all the major DNSBL blacklists to make sure it's clean before I send anything?"},{"title":"Trust verification for unknown host","prompt":"I got a contact form submission from a server at https://partner-api.unknownco.net — can you check whether that host's IP is on any spam or abuse blacklists so I know if I should trust it?"},{"title":"Diagnosing email deliverability problems","prompt":"My emails from https://smtp.acmecorp.com keep ending up in spam folders — can you check if that host's IP is listed on any DNSBL blacklists and tell me how many lists it's on?"}],"resultDescription":"Returns the resolved IP address of the host, the number of DNSBL lists it appears on out of 15 checked, and a severity rating: OK (not listed), WARN (listed on 1–2 lists), or DOWN (listed on 3 or more lists), along with which specific blacklists flagged the IP.","failureModes":["HTTP 400 if the URL resolves to a private, loopback, link-local, or cloud-metadata IP address","HTTP 400 if the URL is malformed or unparseable","DNS resolution failure if the hostname does not exist","Timeout if DNSBL query responses are slow","False negatives if a blacklist is temporarily unavailable during the check"],"whenToPreferThis":"Use this endpoint when you need to verify the spam or abuse reputation of a host's IP before sending email from it, trusting inbound connections, or onboarding a new mail relay. It consolidates 15 DNSBL lookups into a single call with a clear severity rating, saving the overhead of querying each blacklist individually. Prefer this over generic DNS lookup endpoints when the specific concern is spam/abuse reputation rather than simple record resolution.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:30:29.819Z","isFirstParty":false}