First Call

This guide assumes you have installed the SDK and configured at least one provider credential. If you have not done that yet, start with Installation and Authentication.

Fastest Path: CLI

Set a provider API key, then send a single chat request:

export OPENAI_API_KEY="sk-..."

nxuskit-cli chat \
  --provider openai \
  --model gpt-4o \
  "Say hello from nxusKit in one sentence."

For structured shell workflows, use the Level 1 call command:

echo '{"provider":"openai","model":"gpt-4o","prompt":"Say hello from nxusKit."}' \
  | nxuskit-cli call --input - --format json

Rust

Use the Rust wrapper bundled with the SDK as a path dependency:

Cargo.toml

[dependencies]
nxuskit = { path = "/absolute/path/to/nxuskit-sdk-{version}-{platform}/rust" }

use nxuskit::{ChatRequest, Message, NxuskitProvider, ProviderConfig};

fn main() -> Result<(), nxuskit::NxuskitError> {
    let provider = NxuskitProvider::new(ProviderConfig {
        provider_type: "openai".into(),
        ..Default::default()
    })?;

    let request = ChatRequest::new("gpt-4o")
        .with_message(Message::user("Say hello from Rust."))
        .with_max_tokens(100);

    let response = provider.chat(request)?;
    println!("{}", response.content);
    Ok(())
}

Go

Add the Go wrapper and alias the package as nxuskit in your import block:

go get github.com/nxus-SYSTEMS/nxusKit/packages/nxuskit-go

package main

import (
    "context"
    "fmt"
    "os"

    nxuskit "github.com/nxus-SYSTEMS/nxusKit/packages/nxuskit-go"
)

func main() {
    provider, err := nxuskit.NewOpenAIProvider(
        nxuskit.WithAPIKey(os.Getenv("OPENAI_API_KEY")),
    )
    if err != nil {
        panic(err)
    }

    req := nxuskit.ChatRequest{
        Model: "gpt-4o",
        Messages: []nxuskit.Message{
            {Role: nxuskit.RoleUser, Content: "Say hello from Go."},
        },
    }

    resp, err := provider.Chat(context.Background(), req)
    if err != nil {
        panic(err)
    }

    fmt.Println(resp.Content)
}

Python

Install the Python wrapper, then create a provider and call it:

pip install nxuskit-py

from nxuskit import Provider

provider = Provider.create("openai")
response = provider.chat(
    model="gpt-4o",
    messages=[{"role": "user", "content": "Say hello from Python."}],
    max_tokens=100,
)

print(response.content)

C

The SDK bundle includes include/nxuskit.h and platform libraries under lib/. Compile against those files and set the provider API key in the environment:

export OPENAI_API_KEY="sk-..."
cc -I "$NXUSKIT_SDK_DIR/include" \
  -o basic_chat basic_chat.c \
  -L "$NXUSKIT_SDK_DIR/lib" \
  -lnxuskit \
  -Wl,-rpath,"$NXUSKIT_SDK_DIR/lib"

Use the C ABI Reference for function, ownership, and error-handling details.

Local Providers

Local providers do not require API keys:

# Ollama default
export OLLAMA_HOST="http://localhost:11434"

# LM Studio default
export LMSTUDIO_HOST="http://localhost:1234/v1"

Use Local LLM Providers for model setup and provider-specific options.

Next Steps

Goal	Read
Configure credentials	Authentication
Browse runnable projects	Examples
Stream responses	Streaming
Choose a provider	Provider Model
Use CLI JSON contracts	CLI Input Format Reference
Integrate through native boundaries	C ABI Reference