> ## Documentation Index
> Fetch the complete documentation index at: https://docs.signalium.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Health

> Liveness probe + subgraph indexer lag.

## GET /health

```json theme={null}
{ "status": "ok", "timestamp": "2026-04-29T16:42:11.000Z" }
```

## GET /health/subgraph

Compares the Goldsky-indexed head against the chain head. Used by the web header to show a live "synced @ block N" chip when enabled.

```json theme={null}
{
  "configured": true,
  "subgraphBlock": 31808676,
  "chainBlock": 31808681,
  "lag": 5,
  "hasIndexingErrors": false,
  "deployment": "QmXyz…",
  "timestamp": "2026-04-29T16:42:11.000Z"
}
```

Returns `503` with `{ "configured": false }` when `GOLDSKY_GRAPHQL_URL` is unset, or `502` when the subgraph metadata query itself fails.