Tempo Launches Zones for Institutional Privacy (MC 4/24)

Welcome to another edition of the Money Code newsletter (fka The Weekly Stable), the essential source of stablecoin news coverage for global fintech professionals, brought to you by This Week in Fintech and Stablecon.

This week we cover:

Stripe's Tempo launches Zones, bringing permissioned privacy to public stablecoin rails
Ep 29: Why x402 Captures Zero Value w/ Erik Reppel (Coinbase)
Product launches, partnerships and funding news from Drift, KAIO, Fireblocks, Mastercard, MoneyGram, Ramp, Stripe and more.

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🏆 Top Stories

Stripe's Tempo Launches Zones To Offer Permissioned Privacy on a Public Stablecoin Rail

Tempo, the L1 blockchain built by Stripe and Paradigm, unveiled Zones: permissioned parallel blockchains that connect to Tempo's mainnet. Inside a Zone, transactions are shielded from public view while assets remain interoperable with Tempo L1, other Zones, deposit channels, and shared liquidity pools. Each Zone is operated by a trusted entity such as a bank or infrastructure provider, which can see internal activity and set access controls but does not custody underlying assets. Zones are rolling out with a small group of design partners, targeting enterprise use cases spanning payroll, treasury management, and institutional settlement.

Why it matters:

Privacy is the hardest unsolved adoption problem in blockchain because the requirements pull in opposite directions: compliance wants auditability, counterparties want confidentiality, and users often want anonymity. Zones is a deliberate trade-off: operator-visible privacy in exchange for compliance-legible enterprise payments.

Plugs the biggest enterprise blocker on public chains. Corporate flows on public chains expose payroll amounts, supplier pricing, and treasury counterparties to anyone watching. Zones let a bank or payments operator run a private corner of a shared rail without forking liquidity off into a walled-garden chain.
The liquidity problem haunting private chains has a structural fix in Zones, but not an immediate one. Private L1s from Canton to Aleo to Midnight share the same persistent issue: most stablecoin liquidity sits on Ethereum, Tron, Solana, and other public chains, and many counterparties expect easy interoperability with their assets there. Tempo itself is still early and its L1 liquidity is thin, so today Zones don't beat those private chains on this axis, but the bet is architectural: because Zones run inside the public chain rather than alongside it, they compound any liquidity Tempo accretes over time, while private L1s always carry bridging friction to reach external liquidity pools.
Zones pick a side on the privacy spectrum: the institutional side. The privacy landscape sorts by who you have to trust: zero-knowledge systems (Aztec, Railgun) prove statements without revealing data; FHE systems (Zama's cUSDT, Circle × Inco) compute on encrypted state; hardware-based TEEs (Secret, Oasis) lean on chip vendors for speed; operator-mediated models (Canton, Zones) keep data private from the public but visible to a designated operator. Consumer and DeFi flows are consolidating around the cryptographic camp while institutional flows are consolidating around operator-mediated models. Zones won't satisfy privacy purists, but the customer is a bank's compliance team.

📺 Money Code Podcast

Ep 29: Why x402 Captures Zero Value w/ Erik Reppel (Coinbase)

The protocol behind the internet's newest payment layer is designed to make exactly zero dollars. And that might be the point.

Erik Reppel built x402 inside Coinbase, got it to 166 million transactions, then handed it to the Linux Foundation with Google, Stripe, Visa, and Mastercard at the table. He explains why the best outcome is one nobody profits from directly.

We decode

The "Claude cowork class": why non-developers find x402 more valuable than engineers, and what that means for API keys
The agentic premium: how companies are charging 100x more per request than their subscription math would suggest
Value creation vs value capture: what happens when a protocol's explicit goal is to make zero money

Give it a listen and share your feedback by sending me a DM or replying to this email.

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Read on for a round up of this week's news:

📊 Market Trends

"Rails have shifted" — stablecoins topped ACH at $7.5 trillion a month (read more)

💸 Fundraises and M&A

Drift gets $148 million from Tether and partners, replaces Circle stablecoin with USDT after massive exploit (read more)
Tether backs UAE tokenization firm KAIO in $8 million round to bring Emirati funds onchain (read more)

🚀 Product Announcements & Partnerships

Coinbase lists first GBP-backed stablecoin GBP (read more)
Coinbase-incubated x402 protocol launches Agent.market app store for AI agents, processing $50 million in volume across 69K bots (read more)
DoorDash to pay delivery workers in stablecoins via Stripe's Tempo blockchain (read more)
Fireblocks powers a dozen banks' euro stablecoin initiative (read more)
KAST launches USDKy, a reward-bearing stablecoin built on M0's platform (read more)
Mastercard partners with Lobster.cash to enable AI agent card payments (read more)
meow expands stablecoin payment capabilities with BVNK (read more)
MoneyGram partners with NALA for stablecoin-settled payouts across Africa and Asia, leveraging NALA's Rafiki platform (read more)
MoneyGram extends Stellar partnership to scale stablecoin app across Latin America, adding El Salvador after Colombia launch (read more)
Nium and Coinbase partner to power global stablecoin payments and settlement (read more)
Ramp rolls out $0 USDT-to-dollar conversions across its product suite (read more)
Tempo unveils Zones, a privacy solution to run permissioned parallel blockchains (read more)

⚖️ Regulatory Developments

BIS urges global cooperation on stablecoin rules as rulemaking slows, warns of fragmentation risks (read more)
Circle hit with class action lawsuit over alleged inaction in $280 million Drift exploit (read more)
Clarity Act stablecoin yield language pushed back, ban on idle balances still intact (read more)
39 financial institutions demand emergency fast-track for Europe's blockchain pilot program (read more)
France urges banks to expand euro stablecoins and tokenized deposits (read more)
Russia passes crypto bill in first reading, permits use in foreign trade settlements (read more)
South Korea to pilot blockchain-based deposit tokens for government spending (read more)
UK sets out plan to integrate payments rules covering stablecoins and tokenized deposits (read more)