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Endpoints

EnvironmentPaymaster URL
Mainnethttps://starknet.paymaster.avnu.fi
Sepolia Testnethttps://sepolia.paymaster.avnu.fi

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Supported Tokens (avnu Instance)

The avnu paymaster accepts the most liquid ERC-20 tokens on Starknet: Stablecoins: USDC, USDT, DAI Native: ETH, STRK BTC Variants: WBTC, solvBTC, LBTC, xWBTC, xtBTC DeFi: EKUBO, NSTR, LORDS LST: wstETH, Endur derivatives
Token support is automatically updated based on trading volume and liquidity. Running your own instance gives you full control over accepted tokens.

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Monitoring Your Usage

Track your sponsored transactions and gas costs using the Sponsor Activity API: 
async function getSponsorActivity(apiKey: string) {
  const startDate = new Date(Date.now() - 7 * 24 * 60 * 60 * 1000).toISOString();
  const endDate = new Date().toISOString();

  const params = new URLSearchParams({ startDate, endDate });

  const response = await fetch(
    `https://starknet.api.avnu.fi/paymaster/v1/sponsor-activity?${params}`,
    {
      headers: { 'api-key': apiKey }
    }
  );

  const stats = await response.json();
  console.log('Total transactions:', stats.txCount);
  console.log('Successful:', stats.succeededTxCount);
  console.log('Reverted:', stats.revertedTxCount);
  console.log('STRK gas fees:', stats.strkGasFees);
  console.log('Remaining STRK credits:', stats.remainingStrkCredits);
}
Set up alerts when remainingStrkCredits fall below a threshold to avoid service interruption.