generated: '2026-07-19'
method: searched
source: https://api.eldorado.io/guides/sandbox
docs: https://api.eldorado.io/guides/sandbox
summary: >-
  El Dorado publishes a full testnet sandbox for integration testing without real funds. It is
  a market-maker model: the integrator creates an account in the El Dorado DEV app, provides
  USDT<->FIAT liquidity via ads, and executes orders against a USDT testnet token on Arbitrum
  Sepolia funded from a testnet faucet.
environments:
  testnet:
    base_url: https://api-testnet.eldorado.io/api/
    app: El Dorado DEV app (create a new account to act as market maker / liquidity provider)
    widget: https://widget.eldorado.io/
  production:
    base_url: https://api.eldorado.io/api/
test_token:
  symbol: USDT
  network: Arbitrum Sepolia
  chain_id: 421614
  address: '0x25f5D414F85b7f4668ADe4E557ef234023208771'
  decimals: 18
  note: >-
    Only this USDT testnet token on Arbitrum Sepolia is supported in the sandbox; any other
    token or chain causes the order to fail.
faucet:
  description: El Dorado testnet faucet mints dummy USDT (Arbitrum Sepolia) for orders.
  requirements:
  - Web3 wallet (MetaMask, WalletConnect, etc.)
  - Arbitrum Sepolia ETH for gas
  - Arbitrum Sepolia network configured in the wallet
magic_test_values:
- context: Email OTP (login /auth/login/verify-otp)
  value: '12345678'
  note: In the test environment the email login OTP is always 12345678.
- context: Phone verification OTP (POST /api/kyc/phone)
  value: '1234'
  note: Use code 1234 to verify phone numbers in the test/development environment.
- context: KYC residence (test)
  value: country=Argentina (AR), city=CABA
- context: KYC phone (test)
  value: Any dummy Argentinian phone number (e.g. 11 XXXX XXXX)
liquidity_setup:
  steps:
  - Create a new account in the El Dorado DEV app and complete registration/KYC.
  - Contact El Dorado to enable ad creation on the account.
  - Create a Sell ad (users buy USDT from you) and/or a Buy ad (users sell USDT to you).
  - Offer enough liquidity in the chosen fiat currency and payment method to execute test orders.
  note: In production all liquidity is provided by El Dorado's users; in sandbox the integrator is the market maker.
health:
  clock_endpoint: https://api-testnet.eldorado.io/api/clock