Reference Architecture Acquirer Stablecoin settlementEEA + UK

The regulated EMT layer for acquirer settlement. Settle in seconds, redeem at par.

You settle stablecoins to merchants, and MiCA gave EMT issuers no transitional period. Stable Mint is the regulated counterparty layer: EURSM and USDSM settle to merchant wallets in roughly ten seconds.

July 2026 End of MiCA's transitional period for crypto-asset service providers, at the latest. EMT issuers never had one
~10s Card transaction to merchant wallet, end to end
EURSM · USDSM MiCA Title IV EMTs with a statutory 1:1 par redemption right
Currencies and assets

Six fiat rails,
two native stablecoins.

Fiat - settlement & redemption
EURUSDGBPSEKHKDCHF

SEPA, SWIFT, and FPS rails via BankingCircle; domestic SEK via Multitude Bank.

Electronic Money Tokens - MiCA Title IV
EURSMUSDSM

Any USDC-compatible wallet supports USDSM and EURSM. Both are live on Etherlink, Ethereum, Base, and Arbitrum via LayerZero V2 OFT. Issued by Stable mint Ltd as an EU-authorised Electronic Money Institution, with a statutory 1:1 redemption right.

Safeguards

Regulated at every layer.

Licence
MFSA Electronic Money Institution
Token regime
MiCA Title IV · Art. 48-58
Reserves
3 regulated credit institutions
Redemption
1:1 at par · statutory right

Reserve assets are safeguarded across three regulated credit institutions, with no single counterparty holding them all. Both EURSM and USDSM are pausable and support compliance-driven address freezing at the contract level, relevant for an acquirer settling to merchants in regulated verticals with their own compliance and licensing obligations.

The market position

The EMT layer in your acquirer settlement rail.

If you settle stablecoins to merchants today, you may be routing through a non-compliant provider: a third-party issuer not authorised in the EU as a credit institution or EMI.

MiCA gave EMT issuers no transitional period: the rule has applied since 30 June 2024. What counts behind your settlement rail is the issuer's own authorisation.

The challenge

Three constraints
shape your build.

Exposure to non-compliant issuers

Since 30 June 2024, an EMT from an unauthorised issuer cannot be offered in the EU. If your rail settles in such an EMT, you rely on an issuer not authorised in the EU as a credit institution or EMI.

Wallet and UX continuity

Your merchants already run USDC-compatible wallets, operations playbooks, and finance reporting. A new settlement asset shouldn't force a wallet migration or a retraining cycle.

Optionality on USDC

Many merchants still need USDC for downstream liquidity. Your stablecoin layer needs a clean route to USDC alongside the regulated EMT issuance.

Why this matters now

MiCA gave EMT issuers no transitional period.

To offer an EMT in the EU, the issuer must be a credit institution or an authorised EMI. That rule has applied since 30 June 2024, with no transitional period. The transitional period for crypto-asset service providers ended on 1 July 2026 at the latest, and ESMA's Opinion of 8 October 2026 says they should not provide services to EU clients on EMTs that do not comply with MiCA. If the issuer behind your rail is non-compliant, you keep the rail and change the issuer.

Stable Mint is that issuer: an EU-authorised EMI, issuing EURSM and USDSM under MiCA Title IV.

MiCA Title IV · Articles 48-58 · Articles 143(3), 149(3) · ESMA Opinion, 8 October 2026
The architecture

One regulated rail,
card to merchant wallet.

Settlement
Cardholder Card payment · EUR / GBP
Acquirer ledger Visa · Mastercard
Settlement API Settlement call
Mint EURSM · USDSM
Merchant wallet Stable Mint Wallet
Merchant options

Hold as EMT

Treasury, operating reserve, cross-chain. EURSM and USDSM are live on four chains via LayerZero V2.

Fiat off-ramp

Stable Mint burns at 1:1 par redemption and dispatches fiat to the merchant bank via SEPA, SEPA Instant or SWIFT.

USDC routing

Routed via third-party liquidity, at roughly 2 to 3 bps additional cost.

Stable Mint endpoint Stable Mint infrastructure External counterparty

Settlement collapses from T+2/T+3 to roughly ten seconds: the acquirer triggers a Stable Mint settlement call, and EURSM or USDSM mints into the merchant's Stable Mint Wallet in seconds.

Why Stable Mint

Four capabilities
decide the architecture.

MiCA Title IV EMT issuance

EURSM and USDSM are issued under MiCA Title IV by Stable Mint as an EU-authorised EMI. The EMT sits in your settlement rail with an issuer authorised as MiCA requires.

Drop-in wallet compatibility

Any USDC-compatible wallet supports USDSM and EURSM. Your merchants keep their existing wallet integrations, custody set-up, and operations playbook. No migration, no retraining.

USDC routing kept as a fallback

Where merchants still require USDC for downstream liquidity, Stable Mint routes via third-party liquidity at roughly 2 to 3 basis points of additional cost. Optionality is preserved.

Vertically integrated, settled in seconds

Card transaction to merchant wallet collapses from T+2/T+3 to roughly ten seconds. Multi-currency rails, reserves safeguarded across three credit institutions, full lifecycle under one EMI authorisation.

Why an authorised issuer?

An EMT from an unauthorised issuer cannot lawfully be offered in the EU. EURSM and USDSM give your rail an authorised issuer.

How it works

What it takes to go live.

  1. 01

    You add one call

    On your side, integration is a single settlement call into the card flow you already run: destination wallet, amount, EMT denomination. No new rail, no change to how you process cards.

  2. 02

    We run the regulated lifecycle

    Behind that call, Stable Mint mints the EMT, safeguards the reserves across three credit institutions, and redeems at par. The regulated side is ours to operate, not yours to build.

  3. 03

    Your merchants do nothing

    Settlement lands in the USDC-compatible wallets they already use, with reporting that carries over. No migration to coordinate, no retraining across your base.

Results

What the architecture delivers.

01 Speed

Settlement in seconds, card to merchant wallet

A card transaction settles into the merchant's wallet in roughly ten seconds, down from T+2/T+3 on traditional rails, with EURSM or USDSM minting on the settlement call.

02 Compliance

An EU-authorised counterparty in your rail

EURSM and USDSM are issued under MiCA Title IV by Stable Mint as an EU-authorised EMI, with reserves safeguarded across three regulated credit institutions and a statutory 1:1 par redemption right.

03 Continuity

No wallet migration for your merchants

Any USDC-compatible wallet supports USDSM and EURSM, so your merchants keep their existing wallet integrations, custody set-up and operations playbook. No migration, no retraining.

04 Optionality

USDC optionality, preserved

Where merchants still need USDC for downstream liquidity, Stable Mint routes via third-party liquidity at roughly 2 to 3 basis points of additional cost.