Workers, Durable Objects - Filter Durable Object logs and traces by instance ID

<p><a href="https://developers.cloudflare.com/workers/observability/logs/workers-logs/">Workers Logs</a> and <a href="https://developers.cloudflare.com/observability/export/opentelemetry/">OpenTelemetry</a> spans for <a href="https://developers.cloudflare.com/durable-objects/">Durable Object</a> requests include the Durable Object instance ID.</p> <p>Use <code>$workers.durableObjectId</code> to filter logs for a specific instance. Root and child spans include the same ID in <code>cloudflare.durable_object.id</code>.</p> <img src="https://developers.cloudflare.com/cdn-cgi/image/onerror=redirect,width=2000,height=666,format=webp/_astro/2026-07-24-durable-object-trace-filter.DW-BwlKL.png" alt="Query Builder filtering traces by Durable Object instance ID" loading="lazy" decoding="async" width="2000" height="666"> <p>Use these fields to isolate a specific instance and correlate its logs and traces.</p> <p>For more information, refer to <a href="https://developers.cloudflare.com/durable-objects/observability/metrics-and-analytics/">Durable Objects metrics and analytics</a> and <a href="https://developers.cloudflare.com/workers/observability/traces/spans-and-attributes/">Workers tracing spans and attributes</a>.</p>