Google Search Plugin (Potentially Bug or Misconfiguration ?)

[rhonyabdullah]

Current Condition:

• main branch latest

I try to follow this documentation to enable Google Search on Agent endpoint and I’ve set up the GOOGLE_SEARCH_API_KEY and GOOGLE_CSE_ID properly., but this error log keeps appearing.

Agent Model: gemini-2.5-flash-preview-05-20 Error shown in LOG

LibreChat         | 2025-06-16 02:33:47 error: [api/server/controllers/agents/client.js #chatCompletion] Tool Error Request failed with status 400: API key not valid. Please pass a valid API key.
... (another logs)
LibreChat         | 2025-06-16 02:33:52 error: [streamAudio] user: 6846b7432ef51be559093e8f | Failed to stream audio: TypeError: Cannot read properties of undefined (reading 'tts')

If I switch to gemini pro model
Agent Model: gemini-2.5-pro-preview-06-05 Error shown directly on chat

Something went wrong. Here's the specific error message we encountered: An error occurred while processing the request: [{ "error": { "code": 404, "message": "Publisher Model `projects/librechat-1749684596838/locations/us-central1/publishers/google/models/gemini-2.5-pro-preview-06-05` not found.", "errors": [ { "message": "Publisher Model `projects/librechat-1749684596838/locations/us-central1/publishers/google/models/gemini-2.5-pro-preview-06-05` not found.", "domain": "global", "reason": "notFound" } ], "status": "NOT_FOUND" } } ]

[VictorMoni]

Your errors point to two separate but related issues involving Google Gemini API integration in LibreChat. Let's break it down and solve them step by step.

---

✅ 1. 400: API key not valid

Tool Error Request failed with status 400: API key not valid. Please pass a valid API key.

🔍 Cause:

This error means the Google Search tool (probably SerpAPI, Google Custom Search, or Gemini Tools using Google APIs) is missing or using an invalid API key.

✅ Fix:

Make sure you properly set the required API key in your .env or Docker Compose.

If you're using Google Custom Search or Google API, check for these variables:

GOOGLE_API_KEY=your_google_api_key
GOOGLE_CSE_ID=your_custom_search_engine_id

Or for SerpAPI (used in some setups):

SERPAPI_API_KEY=your_serpapi_key

Also ensure your agent config in agents.json or Admin panel explicitly enables the "search" tool and points to the right tool setup.

---

✅ 2. 404: Publisher Model not found

Publisher Model `projects/librechat-.../models/gemini-2.5-pro-preview-06-05` not found.

🔍 Cause:

This error means you're trying to access a Gemini model version that either:

Doesn't exist in your current project/region.

Is not publicly accessible.

You are using the wrong model ID or don't have permission.

---

✅ Fix:

Check these:

a) 🔧 Correct Model Names

The Gemini API expects official model names, not aliases. Example valid names:

models/gemini-1.5-pro-latest

models/gemini-1.5-flash-latest

Try replacing your config with one of these known working names.

b) 📍 Ensure You're Using the Right Project ID

If you’re hardcoding projects/librechat-1749684596838, that must match your actual GCP project. You might not have access to that publisher model if:

It’s a custom or test project.

You're using a different region or have incorrect permissions.

Fix this by either:

Using public model names with publishers/google/models/…

Or setting up the correct project via your Gemini API dashboard

---

✅ 3. Bonus: tts is undefined

Failed to stream audio: TypeError: Cannot read properties of undefined (reading 'tts')

This likely means:

TTS config is missing in your agent setup (e.g., no provider or key set).

The model/agent you're using doesn't support audio streaming.

✅ Fix:

In your .env or Agent config:

TTS_PROVIDER=google
GOOGLE_TTS_KEY=your_google_tts_api_key

Or disable audio output in the UI or agent configuration if not needed.

---

✅ Final Checklist to Fix Everything

✅ Item Description

✅ GOOGLE_API_KEY set Required for Gemini + search
✅ Model name valid Use models/gemini-1.5-pro-latest or similar
✅ Project ID matches or avoid Avoid using projects/librechat-... unless it's yours
✅ Search tool enabled And has correct API keys for Google/SerpAPI
✅ TTS keys configured Or disable audio

[rhonyabdullah]

CMIIW,
I couldn't found GOOGLE_TTS_KEY referring to the LibreChat documentation https://www.librechat.ai/docs/configuration/stt_tts#tts-text-to-speech

Also gemini has 2.5 models now based on this documentation https://ai.google.dev/gemini-api/docs/models#gemini-2.0-flash

I think you just copy and paste GPT answer, but thanks I appreciate it 👍🏼

[rhonyabdullah]

FIndings so far,
Vertex AI didn't has gemini-2.5-pro-preview-06-05 but Vertex AI still use gemini-2.5-pro-preview-05-06 on their pro-preview model

The Google Search remains the same

error: [api/server/controllers/agents/client.js #chatCompletion] Tool Error Request failed with status 400: API key not valid. Please pass a valid API key.

Although I'm disable all restrictions it is still not working.

Prompt Result: