gemini_client_rs

gemini_client_rs is a transport-focused Rust SDK for the Google Gemini API.

It provides:

• typed request and response models
• content generation
• streaming content generation
• model listing
• lightweight telemetry hooks

This crate does not own orchestration, planning, retrieval, or tool-loop execution. Those behaviors should live in the application layer, such as RAIN.

Basic usage

use gemini_client_rs::{gemini_chat, GeminiClient};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = GeminiClient::default();
    
    // Use the declarative gemini_chat! macro for elegant request building
    let req = gemini_chat!(
        user("Summarize this project in two sentences.")
    );

    let response = client
        .generate_content("gemini-2.0-flash", &req)
        .await?;

    println!("{response:#?}");
    Ok(())
}

Position in the stack

• Use gemini_client_rs when you want a low-level SDK for Gemini.
• Use RAIN when you want agentic execution, tool orchestration, retrieval, planning, or multi-step workflows.