# IP Listed on Spamhaus XBL Change Watch

> IP Listed on Spamhaus XBL Change Watch is a paid API for AI agents from ip.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-13).

Monitors whether a given IP address is listed on the Spamhaus XBL blacklist and returns whether the status has changed since the last check.

## Facts

- Endpoint: GET https://ip.intel.rallylive.ca/watch/ip/blacklist/spamhaus-xbl?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ip-listed-on-spamhaus-xbl-change-watch-70111e06
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jpE0QiQKL61quaZkyq29g

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-spamhaus-xbl-change-watch-70111e06
```

Example prompt: Keep an eye on whether 198.51.100.42 is listed on the Spamhaus XBL blacklist and let me know if its status changes since the last time you checked.

## When to prefer this

Use this endpoint when you need to continuously monitor a specific IP address for changes in its Spamhaus XBL blacklist status, particularly in scheduled/polling workflows. Prefer this over a simple point-in-time check when you care about detecting transitions (listed → unlisted or vice versa) and want diff-style before/after output. Ideal for email deliverability monitoring, abuse detection pipelines, or alerting systems that trigger only on change events.

## Known failure modes

- IP address not provided or malformed — query fails with validation error
- No previous check stored (first call for that IP) — 'changed' field defaults to false or undefined with no before/after values
- Spamhaus XBL DNS lookup failure — may return error or stale result
- Results older than 90 days are purged — historical comparison unavailable
- Payment not processed — endpoint returns 402 Payment Required

## How this service works

Change watch for ip listed on spamhaus xbl: runs the check, compares it with the result from your previous call for the same ip (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.

## Output

Returns the current Spamhaus XBL blacklist status for the IP, a boolean indicating whether the status has changed since the previous check (stored up to 90 days), a list of fields that changed with before and after values, and a timestamp of when the IP was last seen.

## 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-spamhaus-xbl-change-watch-70111e06/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)