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Augustus exposes money movement as a small set of API resources. Combine them for your use case. Most work identically for fiat and stablecoins. Where a feature is specific to one API, it’s marked (2026-05-01) or (2023-01-01) below.

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Accounts and balances

  • Operating accounts — hold fiat balances (EUR, GBP, USD). Each has payment details for its rail (IBAN, sort code, ABA). Learn more.
  • Stablecoin wallets — hold USDC on Ethereum, Solana, or Polygon. Learn more.
  • Virtual accounts — sub-ledgered accounts with payment details in your customer’s name. Learn more.
  • Balances — available and pending funds per account. Learn more.
  • Transactions — ledger of every credit and debit. Learn more.

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Deposits and returns

  • Deposits — funds arriving on an account’s payment details. Reconciled automatically. Learn more.
  • Returns — send a deposit back to its original sender. The 2026-05-01 API auto-initiates returns for unmatched deposits. Learn more.
  • Open Banking Checkout (2023-01-01) — instant bank checkout. Learn more.
  • Manual Bank Transfer (2023-01-01) — the customer sends funds using payment details you display. Learn more.

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Payouts

  • Payouts — send fiat or stablecoins to a bank account or wallet. Learn more.
  • International payouts (2026-05-01) — send USD worldwide with routing, validation, and tracking. Learn more.
  • Refunds (2023-01-01) — return a previous Open Banking or Manual Bank Transfer payment. Full or partial. Learn more.

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Conversions

Convert between currencies on demand.
  • Fiat ↔ stablecoin for on-ramp / off-ramp. Learn more.
  • Fiat ↔ fiat for cross-border flows (coming soon).
  • Stablecoin ↔ stablecoin for treasury (coming soon).

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Webhooks

Subscribe to events for real-time notifications on deposits, payouts, orders, and more. Verify the signature and process the event.

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Rate limits

Each source IP can send up to 10,000 requests per 5-minute window across all endpoints. Requests that exceed this limit return 429 Too Many Requests.