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fix: OpenAPI tool _request missing timeout causes ReadTimeout with default httpx 5s #4431
Description
Bug Description
PR #2872 switched OpenAPI tools from requests (sync) to httpx.AsyncClient (async) in rest_api_tool.py. However, the new _request function does not specify a timeout parameter:
async def _request(**request_params) -> httpx.Response:
async with httpx.AsyncClient(
verify=request_params.pop("verify", True)
) as client:
return await client.request(**request_params)requestshas no default timeout (waits indefinitely)httpx.AsyncClienthas a default timeout of 5 seconds
This means API calls that previously worked fine now fail with httpx.ReadTimeout if they take longer than 5 seconds.
Steps to Reproduce
- Configure an OpenAPI tool that calls a slower external API
- Upgrade from google-adk 1.23.0 to 1.24.0
- Execute a tool call that takes more than 5 seconds
Expected Behavior
The API call should succeed as it did in 1.23.0 with requests.
Actual Behavior
httpx.ReadTimeout is raised after 5 seconds.
Suggested Fix
Add an explicit timeout to httpx.AsyncClient in _request. The appropriate value is up to the ADK team, but the current implicit 5s default is too short for many real-world API calls.
Environment
- google-adk: 1.24.0+
- Python: 3.13
Activity
fix: add explicit timeout to OpenAPI tool httpx client
wyf7107 commentedon Feb 10, 2026
@seanzhougoogle do you mind take a look?
fix: add explicit timeout to OpenAPI tool httpx client
adk-bot commentedon Feb 18, 2026
Notification: The author has updated the issue description. Maintainers, please review.
haseryo0403 commentedon Feb 25, 2026
I am also encountering this ReadTimeout issue after upgrading to 1.24.0. The default 5-second timeout is too short for our use case as well. I would appreciate it if the fix in PR #4432 could be merged soon.
shuhei9108 commentedon Feb 26, 2026
Any updates on this? We are also encountering this ReadTimeout issue and would love to see the fix merged soon.
fuki01 commentedon Feb 28, 2026
@wyf7107 What is the status of this?
haseryo0403 commentedon Mar 1, 2026
@wyf7107 @seanzhou1023 @ryanaiagent
Frankly, this delay is unacceptable. This regression is completely blocking us from upgrading to 1.24.0 and beyond.
As long as this implicit 5-second timeout exists, the OpenAPI tools are fundamentally broken for any real-world API calls. Being forced to stay on 1.23.0 is causing severe issues for our operations, and it is extremely frustrating to see a critical bug like this—along with its ready-to-merge PR (#4432)—ignored for weeks.
Please prioritize this immediately. We desperately need this fix merged and a patch released ASAP because we literally cannot upgrade until it is resolved.
fix(tools): disable default httpx 5s timeout in OpenAPI tool _request
fix(tools): disable default httpx 5s timeout in OpenAPI tool _request