Android and Kotlin Multiplatform (KMP) client for accessing different AI providers (OpenAI, Claude...) directly or with API key protection through Gateway's servers

• Enhanced Gemini Support: Advanced image generation and editing capabilities
• Nano Banana Integration: Support for gemini-2.5-flash-image-preview model
• Multimodal Chat: Process and generate both text and images in conversations
• Image Attachment: Attach images to chat messages for context-aware responses

The Gateway client supports the following AI service providers (see Gateway.kt):

• OpenAI
• Google Gemini
• Groq
• Mistral AI
• Together AI
• Anthropic Claude
• AI/ML API
• Custom (any compatible OpenAI-style API)

For KMP projects, add to your commonMain dependencies in your shared module's build.gradle.kts:

commonMain.dependencies {
    implementation("io.github.brahyam:gateway-client:0.4.0")
}

For Android-only projects, add to your build.gradle:

dependencies {
   implementation("io.github.brahyam:gateway-client:0.4.0")
}

For KMP, configure Gateway in your shared code (e.g., RootComponent, MainViewModel, or app startup):

import io.github.brahyam.gateway.client.Gateway

class RootComponent {
    init {
        // Replace with your actual Google Cloud Project Number
        Gateway.configure(
            googleCloudProjectNumber = YOUR_GCP_PROJECT_NUMBER
        )
    }
}

For Android, configure Gateway in your Application class:

import android.app.Application
import io.github.brahyam.gateway.client.Gateway

class MyApplication : Application() {
    override fun onCreate() {
        super.onCreate()
        Gateway.configure(
            googleCloudProjectNumber = YOUR_GCP_PROJECT_NUMBER
        )
    }
}

You can either call AI Services directly (not recommended for production as it exposes your API keys), or use the Gateway-protected service which offers:

• Device attestation: Ensures the request is coming from a genuine device.
• API key protection: Hides your real API keys.
• Rate limiting: Controls the number of requests based on IP/User.
• Certificate pinning: Ensures secure communication with Gateway servers.
• Monitoring: Tracks usage and performance.

Direct (Unprotected!!) OpenAI Service

val openAIService = Gateway.createDirectOpenAIService(
   apiKey = "your-openai-api-key"
)

Gateway-Protected OpenAI Service

val openAIService = Gateway.createOpenAIService(
    partialKey = "your-partial-key", // Get this from the Gateway dashboard
    serviceURL = "your-service-url"   // Get this from the Gateway dashboard
)

val response = openAIService.chatCompletion(
    request = ChatCompletionRequest(
        model = ModelId("gpt-4o-mini"),
        messages = listOf(ChatMessage(role = Role.User, content = "Hello, how are you?"))
    )
)
println(response.choices[0].message.content)

// Initialize Gemini service with Gateway protection
val geminiService = Gateway.createGeminiService(
    serviceURL = "your-service-url",
    partialKey = "your-partial-key",
    logging = LoggingConfig(LogLevel.All)
)

// Generate images with text prompts and optional input images
val geminiImageGeneration = createGeminiImageGenerationWithImages(
    text = "Create a beautiful sunset landscape",
    model = "gemini-2.5-flash-image-preview", // Nano banana model
    images = existingImages, // Optional: for image editing
    responseModalities = listOf("TEXT", "IMAGE")
)

val imageResponse = geminiService.generateImages(geminiImageGeneration)
val generatedImage = imageResponse.getFirstImage()?.data

For a complete working example, check out the sample/android and sample/kmp folders. The KMP sample demonstrates the new image generation features!

Get started and understand more about how to use OpenAI API client for Kotlin with these guides:

• Getting Started
• Chat & Function Call
• FileSource Guide
• Assistants

Appreciate the project? Here's how you can help:

1. Star: Give it a star at the top right. It means a lot!
2. Contribute: Found an issue or have a feature idea? Submit a PR.
3. Feedback: Have suggestions? Open an issue or start a discussion.

Gateway AI Client is an open-sourced software licensed under the MIT license. This is an unofficial library, it is not affiliated with nor endorsed by Open AI. Contributions are welcome.

This project starts as a fork of OpenAI Kotlin Client and the great work of all its contributors. Thank you.