# ads-txt-watch

> ads-txt-watch is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Monitors ads.txt file changes for a domain by comparing the current check against the previous result, returning what changed, which fields changed, and when it was last seen.

## Facts

- Endpoint: GET https://intel.rallylive.ca/watch/site/ads-txt
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ads-txt-watch-9f5b06b8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mTQqm6OoD6u8pK_0WU0hz

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 ads-txt-watch-9f5b06b8
```

Example prompt: Keep an eye on the ads.txt file for example.com and let me know exactly what changed since the last time you checked — which entries were added or removed, and when it was last seen.

## When to prefer this

Use this endpoint when you need to detect changes in a domain's ads.txt file over time on a scheduled basis. It is ideal for compliance monitoring, fraud detection, or audit workflows where you need field-level diffs (before/after values) rather than just the current state. Prefer this over a one-off ads.txt fetch when you need the historical comparison built in without managing your own state.

## Known failure modes

- Domain not found or no ads.txt file present — may return empty or error result
- First call for a domain has no previous result to compare against, so 'changed' may be undefined or false by default
- Domain parameter missing or malformed — likely returns a 400-level error
- Stored previous result expired after 90 days — comparison baseline lost
- Network timeout reaching the target domain's ads.txt URL

## How this service works

Change watch for ads txt: runs the check and compares it with the result from your previous call for the same domain (kept 90 days), returning the current answer, changed true/false, exactly which fields changed with before/after values, and when it was last seen. Call it on a schedule to be told when ads changes. $0.01 per check.

## Output

Returns the current ads.txt check result, a boolean 'changed' flag indicating whether anything differs from the previous call for the same domain, a field-level diff showing exactly which entries changed with their before and after values, and a timestamp of when the result was last seen. Previous results are retained for 90 days.

## 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/ads-txt-watch-9f5b06b8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)