AVNU Paymaster - Starknet Documentation

Overview

AVNU Paymaster enables two modes of gas payment on Starknet:

Gasfree: You sponsor all gas costs for your users
Gasless: Users pay gas in any supported token (USDC, USDT, etc.) instead of STRK

AVNU pioneered paymaster on Starknet and powers 50+ dApps. Starkzap integrates seamlessly with AVNU Paymaster for sponsored transactions.

For complete setup instructions and detailed configuration, see the Paymasters Guide which covers both AVNU Paymaster and Cartridge’s built-in paymaster with step-by-step instructions, code examples, and best practices.

Quick Reference

When to Use AVNU Paymaster

✅ Using Privy strategy for wallet connection
✅ Using Private Key strategy (server-side)
✅ Want to sponsor all gas fees for users (gasfree mode)
✅ Want users to pay gas in tokens instead of STRK (gasless mode)

Basic Configuration

import { StarkZap } from "starkzap";

const sdk = new StarkZap({
  network: "mainnet",
  paymaster: {
    nodeUrl: "https://starknet.paymaster.avnu.fi",
    headers: { "x-paymaster-api-key": "your-api-key-here" },
  },
});

Supported Tokens (Gasless Mode)

USDC, USDT, DAI, ETH, STRK, WBTC, solvBTC, LBTC, EKUBO, NSTR, LORDS, wstETH, and more.

Resources

Paymasters Guide - Complete setup and configuration guide
AVNU Paymaster Documentation
AVNU Portal - Get your API key
Propulsion Program - Gas subsidies up to $1M

Tx Builder

Privy Integration

​Overview

​Quick Reference

​When to Use AVNU Paymaster

​Basic Configuration

​Supported Tokens (Gasless Mode)

​Resources

Overview

Quick Reference

When to Use AVNU Paymaster

Basic Configuration

Supported Tokens (Gasless Mode)

Resources