Inference Gateway Rust SDK

An SDK written in Rust for the Inference Gateway.

• Inference Gateway Rust SDK
  • Installation
  • Usage
    • Creating a Client
    • Listing Models
    • Listing Models from a specific provider
    • Generating Content
    • Streaming Content
    • Tool-Use
    • Health Check
  • Contributing
  • License

Installation

Run cargo add inference-gateway-sdk.

Usage

Creating a Client

Here is a full example of how to create a client and interact with the Inference Gateway API:

use inference_gateway_sdk::{
    CreateChatCompletionResponse,
    GatewayError,
    InferenceGatewayAPI,
    InferenceGatewayClient,
    ListModelsResponse,
    Message,
    Provider,
    MessageRole
};
use log::info;
use std::env;

#[tokio::main]
async fn main() -> Result<(), GatewayError> {
    if env::var("RUST_LOG").is_err() {
        env::set_var("RUST_LOG", "info");
    }
    env_logger::init();

    // Create a client
    let client = InferenceGatewayClient::new("http://localhost:8080/v1");

    // List all models and all providers
    let response: ListModelsResponse = client.list_models().await?;
    for model in response.data {
        info!("Model: {:?}", model.id);
    }

    // List models for a specific provider
    let response: ListModelsResponse = client.list_models_by_provider(Provider::Groq).await?;
    info!("Models for provider: {:?}", response.provider);
    for model in response.data {
        info!("Model: {:?}", model.id);
    }

    // Generate content - choose from available providers and models
    let response: CreateChatCompletionResponse = client.generate_content(Provider::Groq, "deepseek-r1-distill-llama-70b", vec![
    Message{
        role: MessageRole::System,
        content: "You are an helpful assistent.".to_string()
    },
    Message{
        role: MessageRole::User,
        content: "Tell me a funny joke".to_string()
    }
    ]).await?;

    log::info!(
        "Generated content: {:?}",
        response.choices[0].message.content
    );

    Ok(())
}

Listing Models

To list all available models from all configured providers, use the list_models method:

use inference_gateway_sdk::{
    GatewayError
    InferenceGatewayAPI,
    InferenceGatewayClient,
    ListModelsResponse,
    Message,
};
use log::info;

#[tokio::main]
fn main() -> Result<(), GatewayError> {
    // ...Create a client

    // List models from all providers
    let response: ListModelsResponse = client.list_models().await?;
    for model in response.data {
        info!("Model: {:?}", model.id);
    }

    // ...
}

Listing Models from a specific provider

To list all available models from a specific provider, use the list_models_by_provider method:

use inference_gateway_sdk::{
    GatewayError
    InferenceGatewayAPI,
    InferenceGatewayClient,
    ListModelsResponse,
    Provider,
};
use log::info;

// ...Open main function

// List models for a specific provider
let response: ListModelsResponse = client.list_models_by_provider(Provider::Groq).await?;
info!("Models for provider: {:?}", response.provider);
for model in response.data {
    info!("Model: {:?}", model.id);
}

// ...Rest of the main function

Generating Content

To generate content using a model, use the generate_content method:

use inference_gateway_sdk::{
    CreateChatCompletionResponse,
    GatewayError,
    InferenceGatewayAPI,
    InferenceGatewayClient,
    Message,
    Provider,
    MessageRole
};

// Generate content - choose from available providers and models
let response: CreateChatCompletionResponse = client.generate_content(Provider::Groq, "deepseek-r1-distill-llama-70b", vec![
Message{
    role: MessageRole::System,
    content: "You are an helpful assistent.".to_string(),
    ..Default::default()
},
Message{
    role: MessageRole::User,
    content: "Tell me a funny joke".to_string(),
    ..Default::default()
}
]).await?;

log::info!(
    "Generated content: {:?}",
    response.choices[0].message.content
);

Streaming Content

You need to add the following tiny dependencies:

• futures-util for the StreamExt trait
• serde with feature derive and serde_json for serialization and deserialization of the response content

use futures_util::{pin_mut, StreamExt};
use inference_gateway_sdk::{
    CreateChatCompletionStreamResponse, GatewayError, InferenceGatewayAPI, InferenceGatewayClient,
    Message, MessageRole, Provider,
};
use log::info;
use std::env;

#[tokio::main]
async fn main() -> Result<(), GatewayError> {
    if env::var("RUST_LOG").is_err() {
        env::set_var("RUST_LOG", "info");
    }
    env_logger::init();

    let system_message = "You are an helpful assistent.".to_string();
    let model = "deepseek-r1-distill-llama-70b";

    let client = InferenceGatewayClient::new("http://localhost:8080/v1");
    let stream = client.generate_content_stream(
        Provider::Groq,
        model,
        vec![
            Message {
                role: MessageRole::System,
                content: system_message,
                ..Default::default()
            },
            Message {
                role: MessageRole::User,
                content: "Write a poem".to_string(),
                ..Default::default()
            },
        ],
    );
    pin_mut!(stream);
    // Iterate over the stream of Server Sent Events
    while let Some(ssevent) = stream.next().await {
        let ssevent = ssevent?;

        // Deserialize the event response
        let generate_response_stream: CreateChatCompletionStreamResponse =
            serde_json::from_str(&ssevent.data)?;

        let choice = generate_response_stream.choices.get(0);
        if choice.is_none() {
            continue;
        }
        let choice = choice.unwrap();

        if let Some(usage) = generate_response_stream.usage.as_ref() {
            // Get the usage metrics from the response
            info!("Usage Metrics: {:?}", usage);
            // Probably send them over to a metrics service
            break;
        }

        // Print the token out as it's being sent from the server
        if let Some(content) = choice.delta.content.as_ref() {
            print!("{}", content);
        }

        if let Some(finish_reason) = choice.finish_reason.as_ref() {
            if finish_reason == "stop" {
                info!("Finished generating content");
                break;
            }
        }
    }

    Ok(())
}

Tool-Use

You can pass to the generate_content function also tools, which will be available for the LLM to use:

use inference_gateway_sdk::{
    FunctionObject, GatewayError, InferenceGatewayAPI, InferenceGatewayClient, Message,
    MessageRole, Provider, Tool, ToolType,
};
use log::{info, warn};
use serde::{Deserialize, Serialize};
use serde_json::{json, Value};
use std::env;

#[tokio::main]
async fn main() -> Result<(), GatewayError> {
    // Configure logging
    if env::var("RUST_LOG").is_err() {
        env::set_var("RUST_LOG", "info");
    }
    env_logger::init();

    // API endpoint - store as a variable so we can reuse it
    let api_endpoint = "http://localhost:8080/v1";

    // Initialize the API client
    let client = InferenceGatewayClient::new(api_endpoint);

    // Define the model and provider
    let provider = Provider::Groq;
    let model = "deepseek-r1-distill-llama-70b";

    // Define the weather tool
    let tools = vec![Tool {
        r#type: ToolType::Function,
        function: FunctionObject {
            name: "get_current_weather".to_string(),
            description: "Get the weather for a location".to_string(),
            parameters: json!({
                "type": "object",
                "properties": {
                    "location": {
                        "type": "string",
                        "description": "The city name"
                    }
                },
                "required": ["location"]
            }),
        },
    }];

    // Create initial conversation
    let initial_messages = vec![
        Message {
            role: MessageRole::System,
            content: "You are a helpful assistant that can check the weather.".to_string(),
            ..Default::default()
        },
        Message {
            role: MessageRole::User,
            content: "What is the current weather in Berlin?".to_string(),
            ..Default::default()
        },
    ];

    // Make the initial API request
    info!("Sending initial request to model");
    let response = client
        .with_tools(Some(tools.clone()))
        .generate_content(provider, model, initial_messages)
        .await?;

    info!("Received response from model");

    // Check if we have a response
    let choice = match response.choices.get(0) {
        Some(choice) => choice,
        None => {
            warn!("No choice returned");
            return Ok(());
        }
    };

    // Check for tool calls in the response
    if let Some(tool_calls) = &choice.message.tool_calls {
        // Create a new conversation starting with the initial messages
        let mut follow_up_convo = vec![
            Message {
                role: MessageRole::System,
                content: "You are a helpful assistant that can check the weather.".to_string(),
                ..Default::default()
            },
            Message {
                role: MessageRole::User,
                content: "What is the current weather in Berlin?".to_string(),
                ..Default::default()
            },
            Message {
                role: MessageRole::Assistant,
                content: choice.message.content.clone(),
                tool_calls: choice.message.tool_calls.clone(),
                ..Default::default()
            },
        ];

        // Process each tool call
        for tool_call in tool_calls {
            info!("Tool Call Requested: {}", tool_call.function.name);

            if tool_call.function.name == "get_current_weather" {
                // Parse arguments
                let args = tool_call.function.parse_arguments()?;

                // Call our function
                let weather_result = get_current_weather(args)?;

                // Add the tool response to the conversation
                follow_up_convo.push(Message {
                    role: MessageRole::Tool,
                    content: weather_result,
                    tool_call_id: Some(tool_call.id.clone()),
                    ..Default::default()
                });
            }
        }

        // Send the follow-up request with the tool results
        info!("Sending follow-up request with tool results");

        // Create a new client for the follow-up request
        let follow_up_client = InferenceGatewayClient::new(api_endpoint);

        let follow_up_response = follow_up_client
            .with_tools(Some(tools))
            .generate_content(provider, model, follow_up_convo)
            .await?;

        if let Some(choice) = follow_up_response.choices.get(0) {
            info!("Final response: {}", choice.message.content);
        } else {
            warn!("No response in follow-up");
        }
    } else {
        info!("No tool calls in the response");
        info!("Model response: {}", choice.message.content);
    }

    Ok(())
}

#[derive(Debug, Deserialize, Serialize)]
struct Weather {
    location: String,
}

fn get_current_weather(args: Value) -> Result<String, GatewayError> {
    // Parse the location from the arguments
    let weather: Weather = serde_json::from_value(args)?;
    info!(
        "Getting weather function was called for {}",
        weather.location
    );

    // In a real application, we would call an actual weather API here
    // For this example, we'll just return a mock response
    let location = weather.location;
    Ok(format!(
        "The weather in {} is currently sunny with a temperature of 22°C",
        location
    ))
}

Health Check

To check if the Inference Gateway is running, use the health_check method:

// ...rest of the imports
use log::info;

// ...main function
let is_healthy = client.health_check().await?;
info!("API is healthy: {}", is_healthy);

Contributing

Please refer to the CONTRIBUTING.md file for information about how to get involved. We welcome issues, questions, and pull requests.

License

This SDK is distributed under the MIT License, see LICENSE for more information.