curl-curl/docs/cmdline-opts/trace-ids.md
2025-09-15 11:56:36 +02:00

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---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Long: trace-ids
Help: Transfer + connection ids in verbose output
Added: 8.2.0
Category: verbose global
Multi: boolean
Scope: global
See-also:
- trace
- verbose
Example:
- --trace-ids --trace-ascii output $URL
---
# `--trace-ids`
Prepend the transfer and connection identifiers to each trace or verbose line
that curl displays.
The identifiers are unique numbers assigned to each connection and transfer to
allow a user to better understand which transfer and connection each verbose
output line refers to.