Incorrect 403 Forbidden during uvx with non existing package #16340
Description
Summary
Trying to run uvx identify-cli sends the user on a wild goose chase with a spurious 403 error that is not really there. In short, I do not expect to get a 403 Forbidden when looking for a non existing package, when the same configuration works for an existing package.
Environment:
Corparate pypi mirror accessible without credentials
identify-cli is part of identify, so it is correct that uvx errors, but the erro message should be that there is no such package, not a 403
Quick summary
uvx identify-cli
× No solution found when resolving tool dependencies:
╰─▶ Because identify-cli was not found in the package registry and you require identify-cli, we can conclude that your requirements are unsatisfiable.
hint: An index URL (https://pypi.INTRANET.COM/api/pypi/pypi_virtual/simple) could not be queried due to a lack of valid authentication credentials (403 Forbidden).
uvx --from identify identify-cli uv.lock
["file", "non-executable", "text"]
Relevant Verbose output
uvx -v identify-cli
DEBUG No cache entry for: https://pypi.INTRANET.COM/api/pypi/pypi_virtual/simple/identify-cli/
DEBUG Checking netrc for credentials for https://pypi.INTRANET.COM/api/pypi/pypi_virtual/simple/identify-cli/
DEBUG Acquired lock for `credentials store`
DEBUG Released lock at `/home/user/.local/share/uv/credentials/credentials.toml.lock`
DEBUG No credentials file found at /home/user/.local/share/uv/credentials/credentials.toml
DEBUG Indexes search failed because of status code failure: 403 Forbidden
DEBUG Searching for a compatible version of identify-cli (*)
DEBUG No compatible version found for: identify-cli
uvx --from identify identify-cli uv.lock
DEBUG Using request timeout of 30s
DEBUG Solving with installed Python version: 3.14
DEBUG Solving with target Python version: >=3.14
DEBUG Adding direct dependency: identify*
DEBUG Found stale response for: https://pypi.INTRANET.COM/api/pypi/pypi_virtual/simple/identify/
DEBUG Sending revalidation request for: https.INTRANET.COM/api/pypi/pypi_virtual/simple/identify/
DEBUG Found modified response for: https://pypi.INTRANET.COM/api/pypi/pypi_virtual/simple/identify/
WARN Server returned unusable 304 for: https://pypi.INTRANET.COM/api/pypi/pypi_virtual/simple/identify/
DEBUG Searching for a compatible version of identify (*)
DEBUG Selecting: identify==2.6.15 [compatible] (identify-2.6.15-py2.py3-none-any.whl)
DEBUG Found fresh response for: https://pypi.INTRANET.COM/api/pypi/pypi_virtual/packages/packages/0f/1c/e5fd8f973d4f375adb21565739498e2e9a1e54c858a97b9a8ccfdc81da9b/identify-2.6.15-py2.py3-none-any.whl
DEBUG Tried 1 versions: identify 1
DEBUG marker environment resolution took 0.096s
Resolved 1 package in 97ms
Platform
Linux 6.6.87.2-microsoft-standard-WSL2 x86_64 GNU/Linux
Version
0.9.1
Python version
3.14.0