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The Paxos Sandbox environment accepts on-chain crypto deposits from each supported test network. Use this guide to generate a deposit address and source test assets from the Paxos Testnet Faucet or public network faucets.
The Fund button in the Dashboard and the Create Sandbox Deposit endpoint support USD and Paxos-issued stablecoins only (USDP, PAXG, PYUSD, USDG). For all other crypto assets, follow the steps below.

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➊ Generate a Deposit Address

Generate a Sandbox deposit address to receive test assets into your Paxos account. The same address can be reused for multiple deposits.

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Via Dashboard

  1. Log in to the Sandbox Dashboard.
  2. Select Deposit in the top-right corner.
  3. Choose the asset and the corresponding crypto network.
  4. Select the target Profile where the deposit should land.
  5. Copy the generated deposit address.
Previously generated addresses are available under Crypto Addresses. Deposit addresses are immutable — create a new address if you need to change the asset or network.

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Via API

Call POST /v2/transfer/deposit-addresses against the Sandbox base URL (https://api.sandbox.paxos.com). At minimum, provide profile_id and crypto_network:
The response returns the deposit address. Some address types also include a compatible_crypto_networks field listing additional networks that can send to the same address.
See Create Deposit Address for the full request and response schema.

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➋ Source Test Assets

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Paxos Testnet Faucet

The Paxos Testnet Faucet is the recommended source for Paxos-issued test assets including USDP, PAXG, PYUSD, and USDG across supported networks.

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Public Faucets by Network

For native gas tokens and other assets, use the public faucets listed below. Most faucets are rate-limited and dispense small amounts. After receiving test assets in an external wallet, send them to the deposit address you generated in ➊ Generate a Deposit Address.
Faucet availability and limits change over time. If a listed faucet is unavailable, check the network’s official documentation for current alternatives.
For Solana Devnet, signing in to the Solana Faucet with a GitHub account increases the per-request airdrop limit.

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Paxos-Deployed ERC-20 Test Tokens

For ERC-20 trading assets on Ethereum — such as AAVE, UNI, and LINK — Paxos maintains its own test token contracts on Ethereum Sepolia. These assets do not have official deployments on Sepolia, so production contract addresses will not work in Sandbox. You must use the Paxos-deployed contracts listed below. To deposit these tokens, add the contract address to a compatible test wallet (for example, using MetaMask’s Import Token feature), acquire tokens using ETH Sepolia gas, and send them to your Paxos deposit address.
Do not use mainnet or production contract addresses in Sandbox. Only the Paxos-deployed Sepolia contracts listed below are accepted by the Sandbox environment.
Questions? Contact Support.