Why am I seeing requests with sentry baggage and sentry-trace headers? – Sentry Help Center

Issue

I am seeing sentry-trace and sentry baggage headers in my HTTP requests.

Applies To

All Sentry users.

Symptoms

Failed requests due to CORs policies that do not permit sentry-trace and baggage headers

Resolution

Sentry SDKs attach sentry-trace and baggage headers to outgoing requests from the application where the Sentry SDK is utilised. We do this to connect events from one Sentry project to another for the purposes of Distributed Tracing. It is possible that non-Sentry users may also see these headers attached to requests made to their services.

The application that is sending the requests with these headers should configure the tracePropagationTargets configuration option (or equivalent) in a way that limits which requests have these headers attached. It is advisable to only send these headers on requests that should be subject to distributed tracing with Sentry.