Google AI Studio SDK

Pass-through endpoints for Google AI Studio - call provider-specific endpoint, in native format (no translation).

Feature	Supported	Notes
Cost Tracking	✅	supports all models on /generateContent endpoint
Logging	✅	works across all integrations
End-user Tracking	❌	Tell us if you need this
Streaming	✅

Just replace https://generativelanguage.googleapis.com with LITELLM_PROXY_BASE_URL/gemini

Example Usage

curl

curl 'http://0.0.0.0:4000/gemini/v1beta/models/gemini-1.5-flash:countTokens?key=sk-anything' \
-H 'Content-Type: application/json' \
-d '{
    "contents": [{
        "parts":[{
          "text": "The quick brown fox jumps over the lazy dog."
          }]
        }]
}'

Google AI Node.js SDK

const { GoogleGenerativeAI } = require("@google/generative-ai");

const modelParams = {
    model: 'gemini-pro',
};
  
const requestOptions = {
    baseUrl: 'http://localhost:4000/gemini', // http://<proxy-base-url>/gemini
};
  
const genAI = new GoogleGenerativeAI("sk-1234"); // litellm proxy API key
const model = genAI.getGenerativeModel(modelParams, requestOptions);

async function main() {
    try {
        const result = await model.generateContent("Explain how AI works");
        console.log(result.response.text());
    } catch (error) {
        console.error('Error:', error);
    }
}

// For streaming responses
async function main_streaming() {
    try {
        const streamingResult = await model.generateContentStream("Explain how AI works");
        for await (const chunk of streamingResult.stream) {
            console.log('Stream chunk:', JSON.stringify(chunk));
        }
        const aggregatedResponse = await streamingResult.response;
        console.log('Aggregated response:', JSON.stringify(aggregatedResponse));
    } catch (error) {
        console.error('Error:', error);
    }
}

main();
// main_streaming();

Supports ALL Google AI Studio Endpoints (including streaming).

See All Google AI Studio Endpoints

Quick Start

Let's call the Gemini /countTokens endpoint

1. Add Gemini API Key to your environment

export GEMINI_API_KEY=""

2. Start LiteLLM Proxy

litellm

# RUNNING on http://0.0.0.0:4000

3. Test it!

Let's call the Google AI Studio token counting endpoint

http://0.0.0.0:4000/gemini/v1beta/models/gemini-1.5-flash:countTokens?key=anything' \
-H 'Content-Type: application/json' \
-d '{
    "contents": [{
        "parts":[{
          "text": "The quick brown fox jumps over the lazy dog."
          }]
        }]
}'

Examples

Anything after http://0.0.0.0:4000/gemini is treated as a provider-specific route, and handled accordingly.

Key Changes:

Original Endpoint	Replace With
https://generativelanguage.googleapis.com	http://0.0.0.0:4000/gemini (LITELLM_PROXY_BASE_URL="http://0.0.0.0:4000")
key=$GOOGLE_API_KEY	key=anything (use key=LITELLM_VIRTUAL_KEY if Virtual Keys are setup on proxy)

Example 1: Counting tokens

LiteLLM Proxy Call

curl http://0.0.0.0:4000/gemini/v1beta/models/gemini-1.5-flash:countTokens?key=anything \
    -H 'Content-Type: application/json' \
    -X POST \
    -d '{
      "contents": [{
        "parts":[{
          "text": "The quick brown fox jumps over the lazy dog."
          }],
        }],
      }'

Direct Google AI Studio Call

curl https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash:countTokens?key=$GOOGLE_API_KEY \
    -H 'Content-Type: application/json' \
    -X POST \
    -d '{
      "contents": [{
        "parts":[{
          "text": "The quick brown fox jumps over the lazy dog."
          }],
        }],
      }'

Example 2: Generate content

LiteLLM Proxy Call

curl "http://0.0.0.0:4000/gemini/v1beta/models/gemini-1.5-flash:generateContent?key=anything" \
    -H 'Content-Type: application/json' \
    -X POST \
    -d '{
      "contents": [{
        "parts":[{"text": "Write a story about a magic backpack."}]
        }]
       }' 2> /dev/null

Direct Google AI Studio Call

curl "https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash:generateContent?key=$GOOGLE_API_KEY" \
    -H 'Content-Type: application/json' \
    -X POST \
    -d '{
      "contents": [{
        "parts":[{"text": "Write a story about a magic backpack."}]
        }]
       }' 2> /dev/null

Example 3: Caching

curl -X POST "http://0.0.0.0:4000/gemini/v1beta/models/gemini-1.5-flash-001:generateContent?key=anything" \
-H 'Content-Type: application/json' \
-d '{
      "contents": [
        {
          "parts":[{
            "text": "Please summarize this transcript"
          }],
          "role": "user"
        },
      ],
      "cachedContent": "'$CACHE_NAME'"
    }'

Direct Google AI Studio Call

curl -X POST "https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash-001:generateContent?key=$GOOGLE_API_KEY" \
-H 'Content-Type: application/json' \
-d '{
      "contents": [
        {
          "parts":[{
            "text": "Please summarize this transcript"
          }],
          "role": "user"
        },
      ],
      "cachedContent": "'$CACHE_NAME'"
    }'

Advanced

Pre-requisites

• Setup proxy with DB

Use this, to avoid giving developers the raw Google AI Studio key, but still letting them use Google AI Studio endpoints.

Use with Virtual Keys

1. Setup environment

export DATABASE_URL=""
export LITELLM_MASTER_KEY=""
export GEMINI_API_KEY=""

litellm

# RUNNING on http://0.0.0.0:4000

2. Generate virtual key

curl -X POST 'http://0.0.0.0:4000/key/generate' \
-H 'Authorization: Bearer sk-1234' \
-H 'Content-Type: application/json' \
-d '{}'

Expected Response

{
    ...
    "key": "sk-1234ewknldferwedojwojw"
}

3. Test it!

http://0.0.0.0:4000/gemini/v1beta/models/gemini-1.5-flash:countTokens?key=sk-1234ewknldferwedojwojw' \
-H 'Content-Type: application/json' \
-d '{
    "contents": [{
        "parts":[{
          "text": "The quick brown fox jumps over the lazy dog."
          }]
        }]
}'

Send tags in request headers

Use this if you want tags to be tracked in the LiteLLM DB and on logging callbacks.

Pass tags in request headers as a comma separated list. In the example below the following tags will be tracked

tags: ["gemini-js-sdk", "pass-through-endpoint"]

curl

curl 'http://0.0.0.0:4000/gemini/v1beta/models/gemini-1.5-flash:generateContent?key=sk-anything' \
-H 'Content-Type: application/json' \
-H 'tags: gemini-js-sdk,pass-through-endpoint' \
-d '{
    "contents": [{
        "parts":[{
          "text": "The quick brown fox jumps over the lazy dog."
          }]
        }]
}'

Google AI Node.js SDK

const { GoogleGenerativeAI } = require("@google/generative-ai");

const modelParams = {
    model: 'gemini-pro',
};
  
const requestOptions = {
    baseUrl: 'http://localhost:4000/gemini', // http://<proxy-base-url>/gemini
    customHeaders: {
        "tags": "gemini-js-sdk,pass-through-endpoint"
    }
};
  
const genAI = new GoogleGenerativeAI("sk-1234");
const model = genAI.getGenerativeModel(modelParams, requestOptions);

async function main() {
    try {
        const result = await model.generateContent("Explain how AI works");
        console.log(result.response.text());
    } catch (error) {
        console.error('Error:', error);
    }
}

main();