Enable compliant blockchain payments

BRRR is a developer infrastructure for programmable payments. It provides APIs and SDKs for building deposit, withdrawal, and orchestration products. Through BRRR, fintechs can enable end-to-end payment products across 20+ blockchain networks without building or maintaining blockchain infrastructure.

Fintechs integrate via the Integration API for programmatic customer registration, blockchain monitoring, and regulated settlement or the SDK offering TypeScript/JavaScript package for embedding deposit and withdrawal flows with wallet interaction. End-users can connect wallets, select tokens, and BRRR handles conversion, compliance, and settlement. Deposit to USD, EUR, CHF, or GBP; withdraw to 30,000+ tokens on 20+ blockchain networks. Orchestration routes assets across chains automatically. Users never have to interact with a wallet, a chain selector, or a gas fee.

Fintechs that want to add crypto payment capabilities without building blockchain infrastructure. No nodes, no RPCs, no bridge integrations, no wallet infrastructure, no custody. BRRR handles the on-chain complexity; fintechs build the product. Holyheld went from 6 to 21 supported networks without expanding its settlement team, that’s the integration model.

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.

BRRR supports SWIFT, SEPA, ACH, WIRE, and CHAPS.

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. The list is actively expanding.

Orchestration is BRRR’s cross-chain routing layer. It allows end-users to relay any token on any supported network, even if it lives on a different chain than your app is connected to. The API and SDK resolve the optimal path automatically: selecting bridges, computing swap routes, estimating gas, and packaging everything into a single call. No manual bridging, no chain switching, no intermediate tokens. Users see one transaction; BRRR handles the rest.

No. BRRR abstracts blockchain complexity behind standard developer patterns, REST APIs, JSON responses, and an npm package. The SDK manages token approvals, EIP-2612 permit signatures, cross-chain routing, and gas estimation without any direct smart contract interaction from your side. If you’ve built a typical API integration before, you already have the skills to build on BRRR.

Stablecoin rails enable entirely new business models: stablecoin-first neobanks, embedded yield products where users earn while they hold, instant cross-border settlement at a fraction of SWIFT costs, tokenized asset distribution, and programmable payment flows that generate revenue at every step. Settlement clears in under 2 seconds on L2s. These aren’t incremental features, they’re new product categories that didn’t exist on traditional rails.

The SDK @holyheld/sdk and REST 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.