API for AI Agents Payments is now available.

Deposit

Native Crypto Currencies

Accept crypto payments, off-ramp crypto, or build a custom route flow automatically in a single API call.

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Integrated with 150+ stablecoins, protocols, and networks of all sizes

  • < 2s

    Crypto settlement speed

  • 1M+

    Transactions on BRRR

  • 24/7/365

    Smart Contract settlement

You get

  • Accept crypto and stablecoin in a single fiat output

    Tokens, stablecoins, RWAs on 20+ networks. One integration handles asset diversity so your product doesn't have to.

  • Compliance first

    KYC, AML, Travel Rule, and transaction monitoring. Ship crypto deposit products with your compliance team's sign-off, not their objection.

  • Settle in seconds

    Crypto-to-fiat clears on L2s in under 2 seconds. No T+1. No correspondent banks. No cut-off times. Saturday night settles the same as Tuesday afternoon.

  • APIs to coordinate your entire deposit stack

    Exchange, bridge, banking rail, card network, or compliance layer. BRRR is one composable integration that connects the pieces you already have and fills the gaps you don't.

Balance
US$ 0.00
SETTLING...

  • Multi-assets support

    Stablecoins, native tokens, long-tail assets, and tokenized RWAs including treasuries, bonds, and equities.

  • Multi-network support

    Transactions supported on Ethereum, Arbitrum, Base, Solana, Tron, and 20+ other networks through a single endpoint.

  • Fiat rail settlement

    Settle into SEPA, SWIFT, CHAPS, or TARGET2. Same-day or instant depending on the corridor.

  • Modular flow

    Works with your existing architecture, BaaS agreements, and providers. Use components without rebuilding the stack.

  • Wallets supported

    Compatible with external non-custodial wallets, smart wallets, Privy, and custom custodial setups.

  • QR payments checkout

    Enable point-of-sale and e-commerce crypto payments via scannable QR codes integrated via SDK or API.

  • Lend to spend

    Spending directly from yield-bearing positions in real time. No withdrawal or redemption step required.

  • Built-in compliance

    Comprehensive AML/CTF integrated suite for KYC and KYB, transaction monitoring, and Travel Rule compliance.

  • Real-time reconciliation

    Every deposit is tracked on-chain with a full audit trail. Balances, conversions, and settlement status available in real time.

Holyheld

The fintech that runs on BRRR

Holyheld went from 6 to 21 supported networks without expanding its settlement team. Gas fees are abstracted (users pay zero), cross-chain bridging is invisible, and fiat off-ramp to Mastercard happens in a single flow.

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Frequently asked questions

Everything you need to know about BRRR.

General

  • BRRR Deposit lets you accept crypto payments and settle in fiat. Your users pay with tokens, stablecoins, or RWAs from 20+ networks — you receive USD, EUR, CHF, or GBP. One integration covers every supported asset and chain.

  • BRRR generates a live conversion quote, handles transaction signing and token approval, and settles fiat via SEPA, SWIFT, CHAPS, or TARGET2. The SDK and API manage the full flow — your users sign in their own browser or app, and BRRR never touches private keys.

  • Stablecoins, native tokens, long-tail assets, and supported tokenized RWAs — all through one integration. If it's liquid and on a supported chain, BRRR can process it.

  • We accept clients from all countries, except US persons, Russian citizens and residents of: Afghanistan, Angola, Bangladesh, Belarus, Burkina Faso, Burundi, Central African Republic, Cuba, Democratic Republic of the Congo, Guinea, Guinea-Bissau, Haiti, Indonesia, Iran, Iraq, Latvia, Lebanon, Libya, Mainland China (Hong Kong and Taiwan accepted), Mali, Myanmar, Nicaragua, Niger, North Korea, Russia, Somalia, Sudan, South Sudan, Syria, Trinidad and Tobago, Venezuela, Yemen, Zimbabwe.

  • BRRR supports 20+ blockchain networks with continuous expansion: EVM networks like Ethereum, Arbitrum, Base, Hyperliquid and others, plus Solana, Starknet, and Tron. Fiat rails include SEPA, SWIFT, CHAPS, and wire transfers.

  • BRRR supports USD, EUR, CHF, and GBP in fiat currencies. All major stablecoins including USDC, USDT, USDE, USDS, and RLUSD; and 30,000+ other tokens across 20+ blockchain networks.

API Related

  • Under 2 seconds on L2s. Settlement runs 24/7 — no banking hours, no cut-off times, no manual processing.

  • All major types. External non-custodial wallets, smart wallets, embedded wallets like Privy, and custom custodial setups.

  • Yes. Your users can deposit directly from yield-bearing positions without a separate withdrawal or redemption step. BRRR converts the position to fiat in a single flow.

  • The SDK @holyheld/sdk and API are designed for rapid integration. Live demo apps are available for reference. The test environment is accessible immediately with the shared test key. A quickstart guide walks through the full flow from the first API call to completed flow.

  • Yes. On the SDK side, the $SDKTEST customer executes real on-chain transactions without triggering any fiat settlement, so you can validate the complete flow safely. Use low-fee networks like Arbitrum, Polygon, or Avalanche to keep gas costs under a few cents per test.

  • Battle-tested. In production for 3+ years across 30+ European countries. Collaboration with Visa on card network integration. Audited, open-source smart contracts.