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The Vercel Observability dashboard now includes a dedicated view for middleware, showing invocation counts and performance metrics.
Observability Plus users get additional insights and tooling:
Analyze invocations by request path, matched against your middleware config
Break down middleware actions by type (e.g., redirect, rewrite)
View rewrite targets and frequency
Query middleware invocations using the query builder
View the dashboard or learn more about Observability and Observability Plus.