IP Blacklist Checker (DNS-Based, 15 Lists)

x402

IP Blacklist Checker (DNS-Based, 15 Lists) is a paid API for AI agents from netintel-production-440c.up.railway.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-12, last successful call 2026-06-12).

Checks an IPv4 address against 15 major DNS blacklists simultaneously and returns which lists it appears on, a reputation score, and a threat classification.

Price / call$0.05

Seller volume →—

Success100%

StatusUnknown

How this service works

Check an IP address against 15 major DNS blacklists (Spamhaus, Barracuda, SORBS, etc.) simultaneously — returns which lists it appears on, a reputation score, and a threat classification so agents can make block/allow decisions instantly.

Output

Returns a JSON object with the queried IP, a letter grade, a numeric reputation score, a threat_level string, the count of lists it appeared on (listed_count), total lists checked (total_checked), an array of blacklist results (blacklists), an array of findings describing specific detections, and the reversed IP used for DNS queries.

Example use cases

Example prompt

“Check IP 203.0.113.47 against all the major DNS blacklists like Spamhaus and Barracuda and tell me if it's listed anywhere, what its reputation score is, and whether it's a threat.”

Technical details

Endpoint

GEThttps://netintel-production-440c.up.railway.app/ip-blacklist/check?utm_source=zero.xyz

When to prefer

Use this endpoint when you need to quickly assess whether a specific IPv4 address is listed on any of 15 major DNS-based blacklists (Spamhaus, Barracuda, SORBS, etc.) and want a consolidated reputation score and threat classification in a single call, rather than querying each DNSBL individually or using a threat-feed-based checker like AbuseIPDB.

Side effects

Invalid or malformed IPv4 address returns an error
Private or reserved IP ranges may return no meaningful blacklist data
DNS timeout on one or more blacklists may cause partial results
Rate limiting at $0.003/call may reject requests if payment fails
Network issues reaching the DNS blacklist resolvers may cause incomplete checks

Input

{
  "input": {
    "type": "http",
    "method": "GET",
    "queryParams": {
      "ip": "8.8.4.4"
    }
  }
}

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

{
  "ip": "8.8.4.4",
  "grade": "A",
  "score": 100,
  "findings": [],
  "blacklists": [
    {
      "name": "zen.spamhaus.org",
      "listed": false,
      "description": "Spamhaus ZEN — combined spam sources and exploits"
    },
    {
      "name": "bl.spamcop.net",
      "listed": false,
      "description": "SpamCop — reported spam sources"
    },
    {
      "name": "b.barracudacentral.org",
      "listed": false,
      "description": "Barracuda — spam sources"
    },
    {
      "name": "dnsbl.sorbs.net",
      "listed": false,
      "description": "SORBS — spam/proxies/exploits"
    },
    {
      "name": "spam.dnsbl.sorbs.net",
      "listed": false,
      "description": "SORBS Spam — spam sources"
    },
    {
      "name": "http.dnsbl.sorbs.net",
      "listed": false,
      "description": "SORBS Open proxies"
    },
    {
      "name": "sbl.spamhaus.org",
      "listed": false,
      "description": "Spamhaus SBL — spam sources"
    },
    {
      "name": "xbl.spamhaus.org",
      "listed": false,
      "description": "Spamhaus XBL — exploits/botnets"
    },
    {
      "name": "pbl.spamhaus.org",
      "listed": false,
      "description": "Spamhaus PBL — policy block list"
    },
    {
      "name": "dnsbl-1.uceprotect.net",
      "listed": false,
      "description": "UCEPROTECT Level 1"
    },
    {
      "name": "bl.0spam.org",
      "listed": false,
      "description": "0spam — spam sources"
    },
    {
      "name": "dnsbl.dronebl.org",
      "listed": false,
      "description": "DroneBL — botnets/drones"
    },
    {
      "name": "all.s5h.net",
      "listed": false,
      "description": "s5h — spam sources"
    },
    {
      "name": "singular.ttk.pte.hu",
      "listed": false,
      "description": "TTK — spam sources"
    },
    {
      "name": "ix.dnsbl.manitu.net",
      "listed": false,
      "description": "Manitu — spam sources"
    }
  ],
  "reversed_ip": "4.4.8.8",
  "listed_count": 0,
  "threat_level": "clean",
  "total_checked": 15
}

Schema · Response

{
  "type": "json",
  "example": {
    "ip": "1.2.3.4",
    "grade": "A",
    "score": 100,
    "findings": [],
    "blacklists": [
      {
        "name": "zen.spamhaus.org",
        "listed": false,
        "description": "Spamhaus ZEN — combined spam sources and exploits"
      }
    ],
    "reversed_ip": "4.3.2.1",
    "listed_count": 0,
    "threat_level": "clean",
    "total_checked": 15
  }
}

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