# Changelog State API – Monitor Slug

> Changelog State API – Monitor Slug is a paid API for AI agents from changelog-state-api.replit.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Retrieves the current changelog state for a monitored project by slug, returning release history, status, and metadata

## Facts

- Endpoint: GET https://changelog-state-api.replit.app/api/monitors/%7Bslug%7D
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/changelog-state-api-monitor-slug-3beee42b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nc75EPjMKrpEcHk4m7DPp

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 changelog-state-api-monitor-slug-3beee42b
```

Example prompt: Can you check the changelog monitor for 'react-query' and show me the last 5 releases, including whether any are breaking changes?

## When to prefer this

Use this endpoint when you need to programmatically check the release or changelog state of a specific monitored project by its slug — especially useful for detecting new or breaking releases in dependencies, auditing changelog monitor health, or automating version-tracking workflows. Prefer this over manual GitHub polling when you want pre-aggregated release metadata with breaking-change signals and monitoring timestamps in a single call.

## Known failure modes

- Unknown or invalid slug returns 404 or empty result
- Monitor in 'pending' status may have no releases yet
- Network timeout if upstream source (e.g. GitHub) is slow
- limit parameter ignored or defaulted if not provided
- Stale data if lastCheckedAt is far in the past

## How this service works

Changelog State API — built on Replit. Update this description to reflect the app.

## Output

Returns a JSON object containing the monitor's name, slug, current status (e.g. pending), source URL, source type (e.g. github_releases), homepage URL, timestamps for last change/check/success, total release count, and an array of release entries each with URL, body, title, version, breaking flag, entry key, firstSeenAt, and publishedAt timestamps.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer",
   "description": "Maximum number of release entries to return."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "name": "string",
 "slug": "string",
 "status": "pending",
 "releases": [
  {
   "url": "string",
   "body": "string",
   "title": "string",
   "version": "string",
   "breaking": false,
   "entryKey": "string",
   "firstSeenAt": "2026-01-15T09:30:00.000Z",
   "publishedAt": "2026-01-15T09:30:00.000Z",
   "breakingEvidence": "string"
  }
 ],
 "sourceUrl": "string",
 "sourceType": "github_releases",
 "homepageUrl": "string",
 "lastChangeAt": "2026-01-15T09:30:00.000Z",
 "releaseCount": 1,
 "lastCheckedAt": "2026-01-15T09:30:00.000Z",
 "lastSuccessAt": "2026-01-15T09:30:00.000Z"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/changelog-state-api-monitor-slug-3beee42b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from changelog-state-api.replit.app](https://www.zero.xyz/host/changelog-state-api.replit.app/llms.txt)