API for AI Agents Payments is now available.

Web3

Enable compliant fiat payments

Implement native on/off-ramping into your network, protocol, or dApp.

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

  • 86%

    Institutions plan crypto exposure

  • $16.7B

    in tokenized RWAs

  • 32% CAGR

    Institutional DeFi growth through 2031

You get

  • Connect your protocol to the real-world economy

    Your users deposit, lend, and trade on-chain. BRRR connects them to spend, earn, and fiat without leaving your ecosystem. More utility means more users, more volume, more TVL.

  • Expand protocol utility without building payments

    Card issuance, SEPA, SWIFT, cross-border settlement. BRRR handles compliance, card networks, and banking rails. You stay focused on your protocol.

  • Bring institutions on-chain through familiar rails

    Institutional capital needs compliant infrastructure to access DeFi protocols. BRRR provides compliant rails: fiat in, protocol interaction, fiat out. Lower the barrier, grow your TVL.

  • One integration. Every chain your users are on

    BRRR settles across 20+ networks natively. No bridging, no wrapping, no manual rebalancing. Your protocol's reach extends wherever BRRR operates.

Request Sent

  • 20+ Networks

    Operate across multiple blockchain networks through a single integration that reduces engineering complexity and scaling overhead.

  • SDK for protocol integration

    Deploy financial functionality quickly using developer tooling designed to accelerate production-ready integrations.

  • On/Off-ramp

    Allow users to move between fiat and on-chain assets without leaving your platform, improving retention and usability.

  • Cross-chain intent execution

    Execute actions across networks automatically without requiring users to manage bridges or tokens manually.

Starknet

$1M partnership. Real-world utility for an L2 ecosystem.

Read how Starknet enabled cross-chain settlement between Starknet's ZK-rollup and fiat card networks with BRRR.

Read Case Study

Frequently asked questions

Everything you need to know about BRRR.

General

  • BRRR is a developer infrastructure for programmable payments. It provides APIs and SDKs for building deposit, withdrawal, and orchestration products. Through BRRR, protocols can accept fiat deposits from retail and institutional users, compliantly, at scale, without holding a payment license or building fiat infrastructure from scratch.

  • Protocols integrate via the SDK or API. BRRR handles the fiat leg end-to-end: deposit acceptance via SEPA, SWIFT, ACH, WIRE, TARGET2, and cards. BRRR handles KYC, AML verification, and Travel Rule compliance. BRRR does conversion to on-chain assets, and orchestration across 20+ blockchain networks. Users deposit fiat and land directly in your protocol. No exchange accounts, no manual bridging.

  • Web3 projects and protocols that need compliant fiat rails to accept capital at scale. Institutional allocators need regulated infrastructure before they deploy into DeFi protocols. Retail users need a simple path from bank account to on-chain position. BRRR provides both: fiat rails and onchain integration into your app.

  • 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. API & SDK integration covers all supported networks. No bridging, no wrapping, no manual rebalancing.

  • 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.

API Related

  • 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 handles compliance, fiat rail connectivity, card networks, and cross-border settlement. Fiat deposits flow through regulated infrastructure that your compliance and legal teams can build on without building from scratch.

  • BRRR gives your protocol compliant fiat rails, directly to your app for both retail users and institutional allocators. Retail users get a simple path from bank account or card to protocol position. Institutions get regulated infrastructure they can deploy through. Both enter via fiat rails, while BRRR handles compliant conversion and deposits directly into your protocol.

  • 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.

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