fix(cli): set User-Agent on /v1/models probe (Cloudflare 1010)#12999
Merged
Conversation
Custom Claude proxies fronted by Cloudflare with Browser Integrity Check
enabled (e.g. `packyapi.com`) reject requests with the default
`Python-urllib/*` signature, returning HTTP 403 "error code: 1010".
`probe_api_models` swallowed that in its blanket `except Exception:
continue`, so `validate_requested_model` returned the misleading
"Could not reach the <provider> API to validate `<model>`" error even
though the endpoint is reachable and lists the requested model.
Advertise the probe request as `hermes-cli/<version>` so Cloudflare
treats it as a first-party client. This mirrors the pattern already used
by `agent/gemini_native_adapter.py` and `agent/anthropic_adapter.py`,
which set a descriptive UA for the same reason.
Reproduction (pre-fix):
python3 -c "
import urllib.request
req = urllib.request.Request(
'https://www.packyapi.com/v1/models',
headers={'Authorization': 'Bearer sk-...'})
urllib.request.urlopen(req).read()
"
urllib.error.HTTPError: HTTP Error 403: Forbidden
(body: b'error code: 1010')
Any non-urllib UA (Mozilla, curl, reqwest) returns 200 with the
OpenAI-compatible models listing.
Tested on macOS (Python 3.11). No cross-platform concerns — the change
is a single header addition to an existing `urllib.request.Request`.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
Salvage of #12906 by @farion1231.
probe_api_models()sends requests with Python's defaultPython-urllib/3.xUser-Agent. Custom Claude proxies fronted by Cloudflare with Browser Integrity Check reject that signature with HTTP 403 (error 1010). The blanketexcept Exception: continueswallows the error, surfacing as a misleading "Could not reach the API" message.Changes
hermes_cli/models.py: SetUser-Agent: hermes-cli/<version>in the probe headers dicttests/hermes_cli/test_model_validation.py: 2 tests verifying UA is sent (with and without API key)Validation
65/65 tests pass in test_model_validation.py.