---
title: Automatic tracing across Durable Object and Worker subrequests
description: Traces now propagate across service binding and Durable Object calls, producing a single unified trace instead of separate disconnected traces.
image: https://developers.cloudflare.com/changelog-preview.png
---

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## Automatic tracing across Durable Object and Worker subrequests

May 07, 2026 

[ Workers ](https://developers.cloudflare.com/workers/) 

You can now get a single unified trace across Worker-to-Worker subrequests, with trace context propagating automatically. Previously, [automatic tracing](https://developers.cloudflare.com/workers/observability/traces/) produced disconnected traces when a Worker called another Worker through a [service binding](https://developers.cloudflare.com/workers/runtime-apis/bindings/service-bindings/) or [Durable Object](https://developers.cloudflare.com/durable-objects/).

![Unified trace showing nested spans across a Durable Object subrequest and a service binding call](https://developers.cloudflare.com/_astro/2026-04-28-worker-to-worker-context-prop.Db1qNQJL_BUxyi.webp) 

This means you can:

* Follow a request through your entire Worker architecture in one trace view
* See service binding and Durable Object calls as nested child spans instead of separate traces
* Debug cross-Worker request flows in the Cloudflare dashboard or in an external observability platform via [OpenTelemetry](https://developers.cloudflare.com/workers/observability/exporting-opentelemetry-data/)

[Tracing must be enabled](https://developers.cloudflare.com/workers/observability/traces/#how-to-enable-tracing) in your Wrangler configuration for traces to be recorded. Checkout [Workers tracing](https://developers.cloudflare.com/workers/observability/traces/) to get started.

Up next, we are working on external trace context propagation using [W3C Trace Context standards ↗](https://www.w3.org/TR/trace-context/), which will allow traces from your Workers to link with traces from services outside of Cloudflare.