# IP Listed on PSBL Blacklist Change Watch

> IP Listed on PSBL Blacklist 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).

Checks if an IP is listed on the PSBL (Passive Spam Block List) and returns whether the result has changed since the last check, with before/after field diffs and last-seen timestamp.

## Facts

- Endpoint: GET https://ip.intel.rallylive.ca/watch/ip/blacklist/psbl?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-psbl-blacklist-change-watch-774cde0c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_g2exfjmCg8Yqpb_03lhZM

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-psbl-blacklist-change-watch-774cde0c
```

Example prompt: Keep an eye on whether IP 203.0.113.45 is listed on the PSBL spam blacklist, and tell me if anything has changed since the last check — show me what the status was before and what it is now.

## When to prefer this

Use this endpoint when you need to detect changes in PSBL blacklist status for a specific IP over time, rather than just a one-time lookup. It is ideal for scheduled monitoring workflows where you want to be alerted only when something changes, avoiding noise from repeated identical results. Prefer this over a plain PSBL check when you need before/after diff data and change history retained across calls.

## Known failure modes

- IP address not provided or invalid format — may return an error or empty result
- No previous result stored (first call) — 'changed' will be indeterminate or false with no diff
- PSBL service unreachable — check may fail or return stale data
- Previous result expired (older than 90 days) — comparison baseline lost
- Rate limiting or payment failure — call rejected with 402 or similar

## How this service works

Change watch for ip listed on psbl: 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 PSBL blacklist status for the IP, a boolean 'changed' flag indicating whether the result differs from the previous call, a diff of any changed fields with before and after values, and a timestamp of when the status was last seen. Previous results are retained for 90 days for comparison.

## 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-psbl-blacklist-change-watch-774cde0c/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)