# HTTP Methods Check Change Watch

> HTTP Methods Check Change 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).

Runs an HTTP methods check on a URL, compares the result to the previous call (stored up to 90 days), and returns what changed, when, and the current answer.

## Facts

- Endpoint: GET https://intel.rallylive.ca/watch/site/http-methods
- 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/http-methods-check-change-watch-82f5d3ed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eVGAwizOaKIWh53NAlhgb

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 http-methods-check-change-watch-82f5d3ed
```

Example prompt: Keep an eye on https://example.com and let me know if the HTTP methods it accepts ever change — compare against the last time you checked.

## When to prefer this

Use this endpoint when you need to detect changes in HTTP method availability on a URL over time, rather than just fetching the current state. It is ideal for scheduled monitoring workflows where you want to be alerted only when something actually changes, avoiding noise from repeated identical results. Prefer this over a one-shot HTTP methods check when you care about diffing current vs. historical state.

## Known failure modes

- Target URL is unreachable or returns no response — check may fail or return an error state
- First-time call for a URL has no previous result to compare against, so 'changed' is false by default
- Results older than 90 days are purged, resetting the comparison baseline
- Transient network errors may cause false positives in change detection
- Malformed or unsupported URL formats may cause the check to fail

## How this service works

Change watch for http methods check: runs the check and compares it with the result from your previous call for the same url (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 http methods check changes. $0.01 per check.

## Output

Returns the current HTTP methods check result for the given URL, a boolean 'changed' flag indicating whether the result differs from the previous call, a detailed diff of exactly which fields changed with before and after values, and the timestamp of when the previous result was last seen. Historical 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/http-methods-check-change-watch-82f5d3ed/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)