# CARRIER_KEY variable · @imqueue/datadog

Source: https://imqueue.org/api/datadog/latest/datadog.carrier_key/
Published: 2026-08-01
Author: @imqueue maintainers (https://github.com/imqueue)
Package: @imqueue/datadog 3.2.0 — generated reference, not hand-written

Key inside `request.metadata` the propagated trace context travels in. Kept as it always was, so a service running this package still understands calls made by a client running an older release, and the other way round.

**Signature:**

```typescript
CARRIER_KEY = "clientSpan"
```