# Operations, Health & Diagnostics

<p class="page-description">Monitoring, cluster diagnostics, live health probing, and testing endpoints in Stream API.</p>

## Health Check: `GET /health`

Runs responsiveness checks across registered scraper modules.

```http
GET /health HTTP/1.1
Host: api.vyla.cc
```

### Status Codes
- `200 OK`: All active scrapers passed their health probes.
- `207 Multi-Status`: One or more providers failed (degraded state), but the gateway is functional.

### Response Payload
```json
{
  "status": "ok",
  "timestamp": "2026-11-14T20:30:00.000Z",
  "tmdb": true,
  "cache": 142,
  "probe_id": 155,
  "sources": {
    "vidlink": { "ok": true, "ms": 420 },
    "vixsrc": { "ok": true, "ms": 610 },
    "cinecat": { "ok": true, "ms": 890 },
    "movy": { "ok": false, "ms": null }
  }
}
```

**Key Fields:**
- `status`: Overall state (`"ok"` or `"degraded"`).
- `timestamp`: ISO 8601 probe timestamp.
- `tmdb`: True if `TMDB_API_KEY` is configured and responding.
- `cache`: Current number of active cached titles in LRU memory.
- `probe_id`: The TMDB ID used for the probe query.
- `sources`: Dictionary of per-source availability (`ok`) and roundtrip latency in milliseconds (`ms`).

---

## Direct Source Testing: `GET /test/:source`

Tests a single scraper directly without triggering all other providers:

```http
GET /test/vidlink?id=155 HTTP/1.1
```

For television episodes, include season and episode:
```http
GET /test/vixsrc?id=1396&s=1&e=1 HTTP/1.1
```

### Response
Returns the raw candidate stream resolved by that scraper:

```json
{
  "source": "vidlink",
  "url": "https://upstream.example.com/playlist.m3u8",
  "quality": "1080p",
  "type": "hls",
  "server": "vidlink-cf"
}
```

---

## Deep Debug Route: `GET /debug/:source`

Exposes diagnostic internals when `ENABLE_DEBUG_ROUTE=true` is set:

```http
GET /debug/vidlink?id=155 HTTP/1.1
```

**Output details:**
- Raw HTML or JSON received from upstream hosts.
- Time spent solving tokens and parsing DOM.
- Status code and headers from Phase 1 verification (`HEAD` check).
- First 500 bytes of the master M3U8 manifest.
- Preview of rewritten segment URLs.

:::callout-warning
Keep `ENABLE_DEBUG_ROUTE=false` in production to prevent leaking upstream tokens or credentials.
:::

---

## Cluster & Cache Architecture

- **In-Memory Cache**: Up to 1,500 verified titles stored in an LRU cache with a 5-minute TTL.
- **Cache Pruner**: Runs every 30 seconds to evict expired keys.
- **Worker Lifecycle**: The supervisor process maintains workers matching CPU core count, automatically replacing crashed processes.
- **IPC Messaging**: Workers coordinate via `cache:get` and `cache:set` messages, allowing instant cache hits across worker boundaries without an external database.