Ethereum Balance API (Rust + Axum)

A simple Rust microservice that returns the ETH balance of a given address using ethers-rs and axum.

Features

• Connects to Ethereum via RPC
• Parses address from query
• Returns balance in ETH
• Async performance via Tokio

Usage

Set your RPC URL first:

export RPC_URL=https://mainnet.infura.io/v3/YOUR_KEY

2. Run the server

cargo run

3. Query balance

GET /balance?address=0x742d35Cc6634C0532925a3b844Bc454e4438f44e

Example:

http://localhost:3000/balance?address=0x742d35Cc6634C0532925a3b844Bc454e4438f44e

Dependencies

• Axum
• Ethers-rs
• Tokio

License

MIT