httpx Move `URL` and `QueryParams` into `

The Fix

Upgrade to version 0.23.0 or later.

Based on closed encode/httpx issue #2081 · PR/commit linked

Production note: Most teams hit this during upgrades or environment changes. Roll out with a canary and smoke critical endpoints (health, OpenAPI/docs) before 100%.

Jump to Verify Open PR/Commit

@@ -34,7 +34,7 @@
     WriteTimeout,
 )
-from ._models import URL, Cookies, Headers, QueryParams, Request, Response
+from ._models import Cookies, Headers, Request, Response
 from ._status_codes import codes

repro.py

$ wc -l  ./httpx/*.py
     136 ./httpx/__init__.py
       3 ./httpx/__version__.py
     445 ./httpx/_api.py
     304 ./httpx/_auth.py
    1980 ./httpx/_client.py
      48 ./httpx/_compat.py
     362 ./httpx/_config.py
     237 ./httpx/_content.py
     333 ./httpx/_decoders.py
     339 ./httpx/_exceptions.py
     497 ./httpx/_main.py
    1947 ./httpx/_models.py
     234 ./httpx/_multipart.py
     158 ./httpx/_status_codes.py
     152 ./httpx/_types.py
     522 ./httpx/_utils.py

verify

Re-run the minimal reproduction on your broken version, then apply the fix and re-run.

fix.md

Option A — Upgrade to fixed release\nUpgrade to version 0.23.0 or later.\nWhen NOT to use: This fix should not be used if the organization of classes is not desired.\n\n

Why This Fix Works in Production

Trigger: 339 ./httpx/_exceptions.py
Mechanism: The URL and QueryParams classes were not organized in a separate module for better code structure
Why the fix works: Moves the `URL` and `QueryParams` classes from `_models.py` to a new `_urls.py` module for better organization. (first fixed release: 0.23.0).

Production impact:

If left unfixed, the same config can fail only in production (env differences), causing startup failures or partial feature outages.

Why This Breaks in Prod

The URL and QueryParams classes were not organized in a separate module for better code structure
Production symptom (often without a traceback): 339 ./httpx/_exceptions.py

Proof / Evidence

GitHub issue: #2081
Fix PR: https://github.com/encode/httpx/pull/2084
First fixed release: 0.23.0
Reproduced locally: No (not executed)
Last verified: 2026-02-09
Confidence: 0.85
Did this fix it?: Yes (upstream fix exists)
Own content ratio: 0.60

Discussion

High-signal excerpts from the issue thread (symptoms, repros, edge-cases).

Jump to Sources Open on GitHub

“Suggested refactor that'd make for a nice little contribution. I'd normally try to push back on code churn, but I've had this tweak in mind for a while now. I think the code would be slightly better organised if the URL and QueryParams clas”

Issue thread · issue description · source

Failure Signature (Search String)

339 ./httpx/_exceptions.py

Copy-friendly signature

signature.txt

Failure Signature
-----------------
339 ./httpx/_exceptions.py

Error Message

Signature-only (no traceback captured)

error.txt

Error Message
-------------
339 ./httpx/_exceptions.py

Minimal Reproduction

repro.py

$ wc -l  ./httpx/*.py
     136 ./httpx/__init__.py
       3 ./httpx/__version__.py
     445 ./httpx/_api.py
     304 ./httpx/_auth.py
    1980 ./httpx/_client.py
      48 ./httpx/_compat.py
     362 ./httpx/_config.py
     237 ./httpx/_content.py
     333 ./httpx/_decoders.py
     339 ./httpx/_exceptions.py
     497 ./httpx/_main.py
    1947 ./httpx/_models.py
     234 ./httpx/_multipart.py
     158 ./httpx/_status_codes.py
     152 ./httpx/_types.py
     522 ./httpx/_utils.py

What Broke

No production failure was reported; this is a refactor without impact.

Why It Broke

The URL and QueryParams classes were not organized in a separate module for better code structure

Fix Options (Details)

Option A — Upgrade to fixed release Safe default (recommended)

Upgrade to version 0.23.0 or later.

When NOT to use: This fix should not be used if the organization of classes is not desired.

Use when you can deploy the upstream fix. It is usually lower-risk than long-lived workarounds.

Fix reference: https://github.com/encode/httpx/pull/2084

First fixed release: 0.23.0

Last verified: 2026-02-09. Validate in your environment.

When NOT to Use This Fix

This fix should not be used if the organization of classes is not desired.

Verify Fix

verify

Re-run the minimal reproduction on your broken version, then apply the fix and re-run.

Did This Fix Work in Your Case?

Quick signal helps us prioritize which fixes to verify and improve.

Prevention

Add a CI check that diffs key outputs after upgrades (OpenAPI schema snapshots, JSON payload shapes, CLI output).
Upgrade behind a canary and run integration tests against the canary before 100% rollout.

Version Compatibility Table

Version	Status
0.23.0	Fixed

Related Issues

No related fixes found.

Cluster: httpx:configuration-error All hubs All clusters

Related clusters: Data consistency Other Timeout

Sources

We don’t republish the full GitHub discussion text. Use the links above for context.

httpx Move `URL` and `QueryParams` into `_urls.py` (Fix)