# IP Listed on CBL - Change Watch

> IP Listed on CBL - 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 2026-10-12).

Monitors whether an IP address is listed on the Composite Blocking List (CBL) and returns change detection results compared to the previous check.

## Facts

- Endpoint: GET https://ip.intel.rallylive.ca/watch/ip/blacklist/cbl?utm_source=zero.xyz
- Price: $0.02/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-cbl-change-watch-674cbf39
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rUqcmEhY9XKfI7KYkH2Sq

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-cbl-change-watch-674cbf39
```

Example prompt: Check if the IP 203.0.113.42 has changed its listing status on the CBL blacklist since the last time you checked, and tell me whether anything is different now.

## When to prefer this

Use this endpoint when you need change-detection semantics — i.e., you want to know not just whether an IP is on CBL right now, but whether that status has changed since your last check. Prefer this over a simple point-in-time CBL lookup when building scheduled monitoring, alerting pipelines, or audit trails. It is especially useful for recurring polling workflows where bandwidth and noise reduction matter, since it explicitly flags unchanged results.

## Known failure modes

- Missing or invalid IP address parameter returns an error
- IP not previously checked returns no 'changed' comparison (first-call baseline only)
- Previous result older than 90 days causes loss of comparison baseline
- CBL DNS lookup timeout or upstream unavailability may cause check failure
- Malformed IP (non-routable, IPv6 if unsupported) may yield an error response

## How this service works

Change watch for ip listed on cbl: 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 CBL listing status for the IP, a boolean indicating whether the result changed since the previous call (stored for 90 days), any fields that changed with before/after values, and the timestamp of when the IP was last seen in that state.

## 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-cbl-change-watch-674cbf39/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)