BVNK is enterprise stablecoin payment infrastructure: one REST API to accept stablecoins from customers, hold fiat and stablecoin balances, and pay out to any wallet, with BVNK handling quotes, conversion, blockchain monitoring, and gas. Mastercard completed its acquisition of BVNK on August 3, 2026.

How does a BVNK pay-in work?

The platform creates a payment (POST /api/v1/pay/summary, type IN); BVNK locks a quote and returns a unique deposit address and hosted-page URL; the customer sends stablecoins on-chain; after confirmations BVNK converts and credits the platform wallet and fires a signed webhook — statuses run PENDING, PROCESSING, then COMPLETE, UNDERPAID, or EXPIRED.

How does a BVNK payout work?

The platform validates the destination address, creates a payout with a locked quote (optionally twoStep for an explicit confirm gate valid one hour), and confirms it; BVNK debits the funding wallet, converts fiat to stablecoin if needed, pays gas, and broadcasts the transfer — on-chain payouts are final with no recall.

Why did Mastercard buy BVNK?

The up-to-$1.8B acquisition, announced March 2026 and closed August 3, 2026, made Mastercard the first major card network to own stablecoin settlement infrastructure, adding roughly $30B in annualised stablecoin payment volume for cross-border B2B, settlement, and treasury use cases.

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BVNK Stablecoin Payments — a Mastercard Company

BVNK is enterprise stablecoin payment infrastructure: one API to accept stablecoins from customers, hold balances across fiat and digital currencies, and pay out to any wallet — with BVNK handling quotes, conversion, blockchain monitoring and gas. On August 3, 2026 Mastercard completed its acquisition of BVNK (up to $1.8B), becoming the first major card network to own stablecoin settlement rails. This guide covers the architecture, pay-in and payout transaction flows, the status model, and what the acquisition means.

What is BVNK?

BVNK operates a payments platform that bridges fiat and stablecoin rails for businesses: platforms integrate one REST API and get hosted payment pages, per-customer deposit addresses, multi-currency wallets, FX between fiat and stablecoins, and signed webhooks — across customers in 130+ countries and the major blockchain networks. It is the "PSP model" applied to stablecoins: the platform never has to run nodes, manage keys, pay gas, or watch mempools.

The core products are pay-ins (accept stablecoins via single-use Payment Links or reusable Channels, settling into fiat or crypto wallets), payouts (send stablecoins from a fiat or crypto balance with locked quotes), plus embedded wallets, virtual accounts for fiat legs, and an on-ramp product.

One ledger

Fiat + stablecoin wallets

Hold USD, EUR, GBP alongside USDT/USDC. Pay-ins can settle in fiat; payouts can be funded from fiat — conversion happens inside the platform at quoted rates.

Hosted UX

Hosted payment pages

Every payment and channel returns a redirectUrl to a BVNK-hosted page with QR code, live quote and address validation — or build your own UI on the raw API.

Event-driven

Signed webhooks

Every status change fires an HMAC-SHA256-signed webhook with retries (up to 100, capped 15-minute backoff) and unique event IDs for idempotency.

One-line summary: BVNK is to stablecoin rails what an acquirer/PSP is to card rails — the regulated, API-fronted intermediary that turns "accept and send USDC" into a couple of REST calls. Since August 2026 that intermediary is owned by Mastercard.