Grounding URLs are through vertexaisearch.cloud.google

[ceilingfans]

What I am trying to do

I am trying to get the actual URL of the grounding chunk. However, all the URLs in the metadata are redirect links to vertexaisearch.cloud.google.com. I would like to know if there is a way to obtain the result without performing another HTTP request to the vertexaisearch.cloud.google.com and following the redirects.

I have read the docs and found that GroundingChunkWeb#domain exists however through testing, I have found that it just gives me None.

My Code

# To run this code you need to install the following dependencies:
# pip install google-genai

import base64
import os
from google import genai
from google.genai import types


def generate():
    client = genai.Client(
        api_key=os.environ.get("GEMINI_API_KEY"),
    )

    model = "gemini-2.5-flash-preview-09-2025"
    contents = [
        types.Content(
            role="user",
            parts=[
                types.Part.from_text(text="""Search the web for the latest news on AI advancements"""),
            ],
        ),
    ]
    tools = [
        types.Tool(url_context=types.UrlContext()),
        types.Tool(googleSearch=types.GoogleSearch(
        )),
    ]
    generate_content_config = types.GenerateContentConfig(
        thinking_config = types.ThinkingConfig(
            thinking_budget=-1,
        ),
        tools=tools,
    )

    res = client.models.generate_content(model=model, contents=contents, config=generate_content_config)
    print(res.candidates[0].grounding_metadata.grounding_chunks)
    print("="*50)
    print(res.candidates[0].grounding_metadata.grounding_chunks[0].web.domain)

if __name__ == "__main__":
    generate()

Output

[GroundingChunk(
  web=GroundingChunkWeb(
    title='openai.com',
    uri='https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQE7lMEaHE1RkAGMA-shF_58De-kPLvfEhx8u1AwaNefWUQZqnQs3vfOJNh2z-d7XPKBOG9S2_1PI0Yhyrs4_9nik_YdfOxa97qkbfRolTRTK2xpYw=='

<... snip ...>

), GroundingChunk(
  web=GroundingChunkWeb(
    title='mit.edu',
    uri='https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQEBBzMGiOTYFvDK1niZ-hwEiAtnWHXC69jaHsCgq7Afq2sCOIBFstmNgrz-AyUkDjRNaDufa3QE0Y_VBs04TZ4anT2X6Z-_EGfzJHN7u5NtpeILeqjvpqWehCtpLDOqDKnV9ipqPt-_8t7yeDkz6GkGnfRRl2slpZOoOsn5yqckb8AsjFg8vLaaOL56'
  )
)]
==================================================
None

Error Messages

None

[janasangeetha]

Hey @ceilingfans
Thanks for reaching out!
I will check on this and get back to you!