01What mBridge is

Project mBridge — "multiple CBDC Bridge" — is a wholesale multi-CBDC platform letting participating central banks and commercial banks settle cross-border transactions directly in tokenized central bank digital currencies, on a shared platform, without routing through the traditional correspondent-banking chain. It's a wholesale CBDC (wCBDC) arrangement: built for interbank settlement, not direct public use.

The BIS Innovation Hub's Hong Kong Centre coordinated it from 2021, working with the People's Bank of China, the Hong Kong Monetary Authority, the Bank of Thailand, and the Central Bank of the UAE as founding participants.

02Reaching MVP, 2021–2024

mBridge moved through pilot phases faster than most multilateral CBDC efforts. By June 2024, the BIS announced the platform had reached minimum viable product (MVP) stage and invited further international participation. Saudi Arabia's central bank, SAMA, joined as a full participant that year, bringing the platform to five central banks.

This is the part worth taking seriously regardless of what happened next: mBridge demonstrated that wholesale cross-border CBDC settlement works technically, at real volume, across genuinely different sovereign systems. That was not a foregone conclusion in 2021.

03Why BIS withdrew

In late 2024, the BIS withdrew its involvement from mBridge, describing the platform as having "graduated" from the Innovation Hub after four years of BIS-led development. Public reporting has been more specific about the underlying reason: BIS could not continue supporting a platform whose participant base was drifting toward BRICS+-adjacent membership, raising the prospect of sanctioned jurisdictions — Russia and Iran have both been publicly discussed in this context — gaining access to a BIS-coordinated settlement rail. As a standard-setting body accountable to a broad, cross-bloc membership of central banks, BIS's neutrality was the thing put at risk by continuing.

The technology wasn't the problem. The problem was that a platform's neutrality is only as durable as the willingness of every one of its members to keep it that way — and BIS couldn't guarantee that as the membership grew.

04What happened next

mBridge didn't shut down. The remaining participants — the People's Bank of China, Hong Kong Monetary Authority, Bank of Thailand, Central Bank of the UAE, and Saudi Arabia's SAMA — kept it running independently. By 2026, reporting put cumulative volume at roughly $55.5 billion processed across more than 4,000 transactions, with approximately 95% of that value settled in e-CNY (China's digital yuan) — a reasonable reflection of which participant's economy and trade volume dominates the platform.

BIS, meanwhile, redirected its cross-border settlement efforts into Project Agorá, launched the same year, convening seven G7-aligned central banks alongside more than 40 private financial institutions — including JPMorgan, Citi, HSBC, and SWIFT — to explore tokenized commercial-bank deposits and wholesale CBDC on a different platform, with a membership BIS was evidently more comfortable standing behind.

05The actual lesson

It's tempting to read mBridge's story as a geopolitical curiosity and move on. We'd argue it's the single clearest piece of evidence available today about how cross-border CBDC infrastructure governance actually breaks:

  • Consortium governance concentrates risk in membership composition. A shared-ledger platform's acceptability to any one participant depends on who else is on it — and that can change after you've joined.
  • A coordinator's neutrality has a shelf life if it has to keep expanding membership to stay relevant. BIS didn't lose technical control of mBridge; it lost the ability to vouch for who was using it.
  • The remaining participants didn't need BIS to keep operating. That's a genuinely positive result for mBridge's founders, but it also means the "neutral convener" role simply evaporated rather than transferring to anyone else.

06Where this leaves interoperability infrastructure

mBridge answers the "can this work technically" question convincingly. It leaves the "who should govern it" question more open than it was in 2021 — and that's the question Recryp's architecture is built around: bilateral, jurisdiction-configurable corridors instead of a shared consortium ledger, so a corridor's legitimacy doesn't depend on the composition of a wider group of participants that has nothing to do with either side of that specific corridor. See how this plays out concretely on our central banks and regulators pages.

Recryp is not affiliated with, and does not participate in, mBridge, Project Agorá, or any BIS Innovation Hub initiative. This explainer draws on public BIS statements and public reporting, cited as market context.