# IP Listed on NordSpam DNSBL

> IP Listed on NordSpam DNSBL is a paid API for AI agents from ip.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Checks whether a given IPv4 address is listed on the NordSpam blacklist (bl.nordspam.com) via DNSBL lookup and returns listed status with return codes and reason text.

## Facts

- Endpoint: GET https://ip.intel.rallylive.ca/ip/blacklist/nordspam?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ip-listed-on-nordspam-dnsbl-fdae799e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_i-HOqPzmwoJ2Fwc7Sqyis

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability ip-listed-on-nordspam-dnsbl-fdae799e
```

Example prompt: Can you check if the IP address 192.168.1.100 is listed on the NordSpam blacklist and tell me whether it's flagged and why?

## When to prefer this

Choose this endpoint when you need a precise, single-list NordSpam DNSBL check for a specific IPv4 address, especially when you want the exact NordSpam return codes and reason text rather than a generic multi-list reputation score. Prefer it over broader reputation aggregators when your concern is specifically NordSpam listing status, for example when diagnosing email deliverability issues or screening IPs against this specific blocklist.

## Known failure modes

- Invalid or non-routable IPv4 address provided returns an error
- DNS resolution failure via Cloudflare DoH may result in timeout or unavailable response
- IP not found in DNSBL returns listed=false with no reason text
- Malformed input (e.g. IPv6 or hostname instead of IPv4) may return an error or unexpected result
- Payment failure ($0.01 USDC) results in request rejection

## How this service works

Is this IPv4 address listed on nordspam (bl.nordspam.com)? Performs the DNSBL query (reversed octets under bl.nordspam.com, 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.

## Output

Returns a yes/no listing status indicating whether the IPv4 address is present on the NordSpam DNSBL (bl.nordspam.com), along with any associated DNSBL return codes and, where published by the list, a human-readable reason string explaining why the IP was listed.

## Request schema (JSON Schema)

```json
{
 "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"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ip-listed-on-nordspam-dnsbl-fdae799e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ip.intel.rallylive.ca](https://www.zero.xyz/host/ip.intel.rallylive.ca/llms.txt)