Weekly Payment Newsletter — Agentic Commerce, Stablecoins and the Race for Payment Infrastructure

**September 20, 2026

Week of September 14–20**

The payments industry moved decisively toward a new infrastructure stack this week: AI agents are becoming transaction participants, stablecoins are moving deeper into regulated payment infrastructure, and banks and governments are investing in new domestic and cross-border rails.

1. Top Headlines

Grab agrees $1.49bn deal to buy majority stake in APAC BNPL platform Atome — Finextra. Grab agreed to acquire 60% of Atome Financial for $1.49 billion, with an agreement to acquire the remaining 40% later under a performance-linked framework. Atome serves 25 million cumulative transacted users across Singapore, Malaysia, the Philippines, Indonesia and Thailand, making the deal significant for the convergence of payments, consumer lending and super-app financial services in Southeast Asia. (Finextra) Read the original Finextra article
Circle launches Arc mainnet — Finextra. Circle launched Arc, an open Layer-1 blockchain designed for financial markets, real-time money movement and agentic economic activity. Its launch includes USDC-native gas, sub-second settlement and a founding validator group including BlackRock, DTCC, Standard Chartered and Visa, highlighting the growing institutional focus on programmable money infrastructure. (Finextra) Read the original Finextra article
Payments infrastructure startup Fin.com emerges from stealth with $20m — Finextra / FinTech Futures. Fin.com raised $20 million in seed funding to build an orchestration layer connecting local payment rails, USD virtual accounts, SWIFT and stablecoin settlement. Its model reflects growing demand for a single infrastructure layer capable of moving money across traditional and blockchain-based rails. (Finextra) Read the original Finextra article
UK Payments Delivery Company opens fundraising for new national payments system — FinTech Futures. UK PDC is seeking industry funding for a new retail payments infrastructure, with the reported initial target around £50 million. The initiative is intended to replace the current Faster Payments and Bacs infrastructure with a purpose-built central system, placing payments sovereignty and infrastructure resilience firmly on the UK agenda. (FinTech Futures) Read the original FinTech Futures article
Circle, Ripple and Visa join $10m funding round for Velocity — Finextra. Stablecoin infrastructure provider Velocity raised a further $10 million from Visa Ventures, Circle Ventures, Ripple and other investors. The company is developing infrastructure that allows financial institutions and merchants to use stablecoins for settlement, liquidity and treasury operations without replacing existing systems. (Finextra) Read the original Finextra article
ECB calls on merchants to join digital euro pilot — Finextra. The European Central Bank opened applications for e-commerce and mobile-commerce merchants to participate in a 12-month digital euro pilot expected to begin in the second half of 2027. The pilot follows the selection of 36 PSPs and will test real-world merchant payment experiences before any final decision on issuing a digital euro. (Finextra) Read the original Finextra article
Saudi fintech Tabby raises $233m at $6.5bn valuation — FinTech Futures / Finextra. Tabby raised $233 million as it expands beyond BNPL into broader financial services. The funding underlines the continued development of Gulf fintech ecosystems and the evolution of BNPL platforms toward wider consumer financial propositions. (Finextra) Read the original Finextra article
PayNearMe acquires Marr Labs to embed AI agents into payments — Finextra. PayNearMe acquired Marr Labs’ technology assets and team to bring agentic AI into its PayXM payment-management platform. The move illustrates a shift from AI as a separate customer-service layer toward AI embedded directly into regulated payment workflows. (Finextra) Read the original Finextra article
Worldline enables agentic commerce through Universal Commerce Protocol — Finextra. Worldline launched a payment handler for the Universal Commerce Protocol, enabling merchants to support AI-initiated purchases through a unified configuration. The development points toward an emerging payment model in which AI agents discover products, initiate transactions and interact with merchant infrastructure on behalf of consumers. (Finextra) Read the original Finextra article
Bank Pekao selects NCR Atleos for card payment infrastructure — FinTech Futures. Poland’s Bank Pekao is modernising card authorisation, processing and routing through NCR Atleos’ Authentic switching platform. The project demonstrates that modern payment strategy is not only about new rails: upgrading the core switching layer remains critical for scalability and future payment innovation. (FinTech Futures) Read the original FinTech Futures article

2. In-Depth Highlight

Stablecoins Move From Alternative Asset to Payment Infrastructure

The week’s clearest structural signal is the accelerating integration of stablecoins into mainstream payment infrastructure. Circle launched Arc, an institutional-oriented blockchain with native USDC transaction economics, while Velocity raised additional capital from major payment and stablecoin players to support institutional settlement and treasury use cases. (Finextra)

At the same time, Fin.com is building infrastructure that combines traditional fiat rails, SWIFT connectivity, virtual accounts and stablecoin settlement. This suggests the competitive question is shifting from whether stablecoins will replace existing payment rails to how traditional and blockchain rails will be orchestrated together. (Finextra)

For banks and payment providers, the implications extend beyond faster settlement. Liquidity management, compliance, custody, treasury operations, interoperability and transaction monitoring will increasingly need to work across both conventional and tokenised money.

The rise of agentic commerce adds another dimension: autonomous software may eventually initiate transactions using programmable digital money. Payment infrastructure therefore has to evolve simultaneously around money, identity, authorisation, risk and machine-to-machine interaction.

3. Market & Industry Insight

The payment stack is increasingly becoming multi-rail by design. Traditional card networks, account-to-account payments, instant-payment systems, digital wallets, SWIFT, tokenised deposits and stablecoins are no longer necessarily competing as isolated ecosystems. Infrastructure providers such as Fin.com and the UK PDC demonstrate the strategic value of orchestration and common infrastructure, while Arc and Velocity show how blockchain-based settlement is being designed for institutional use. (Finextra)

A second major trend is the emergence of the AI-native payment journey. Worldline’s UCP integration and Mastercard’s work with Trip.com show the industry moving beyond chatbots toward AI systems capable of discovering products and facilitating purchases. Meanwhile, PayNearMe’s acquisition of Marr Labs shows how payment companies are embedding agents directly into operational workflows. (Finextra)

The strategic challenge will be trust. In agentic payments, authentication of a human user is only one part of the problem; platforms also need to establish what an AI agent is authorised to do, what spending limits apply, how fraud is detected and how transactions can be audited.

4. Company & Startup Spotlight

Fin.com

Fin.com is building payment infrastructure that connects fiat and stablecoin rails, including local payments, USD virtual accounts and SWIFT. Its $20 million seed round, backed by Expa, Coinbase Ventures and other investors, reflects investor interest in infrastructure that abstracts away the complexity of cross-border money movement. (Finextra)

Why it matters: Payment providers increasingly need to support multiple settlement methods without building separate infrastructure for every country, currency and rail.

Grab & Atome

Grab’s proposed $1.49 billion acquisition of a 60% stake in Atome would combine Grab’s payments, digital banking and lending capabilities with Atome’s BNPL and consumer-lending platform. The transaction highlights the continued convergence of payments, credit and embedded financial services across Southeast Asia. (Finextra)

Why it matters: The deal illustrates how regional payment platforms are expanding from transaction processing toward broader financial ecosystems.

5. Regulatory & Policy Watch

European digital euro: The ECB’s merchant pilot is expected to begin in H2 2027. Applications for participating merchants are due by 27 October 2026, subject to the ECB’s stated pilot requirements. (Finextra)
UK payment infrastructure: UK PDC’s fundraising is part of the broader National Payments Vision and the effort to develop new domestic retail payment infrastructure. The initiative is intended to replace today’s Faster Payments and Bacs infrastructure with a new central system. (Finextra)
Payments sovereignty: Both UK and European initiatives indicate that payment infrastructure is increasingly being treated as strategic national and regional infrastructure, alongside the traditional objectives of cost, speed and consumer convenience. (Finextra)

6. Quote of the Week

“The agentic economy and the onchain economy are not two different revolutions; they are the same economy seen from two sides.”

— Jeremy Allaire, CEO, Circle, commenting on the launch of Arc. (Finextra)

7. What’s Next

Sibos 2026 — September 28–October 1: A major industry event for global transaction banking, payments, cross-border infrastructure and digital assets. (FinTech Futures)
ECB Digital Euro merchant information session — October 6: The ECB plans an information session for prospective pilot merchants. (Finextra)
ECB digital euro pilot applications — October 27: Merchant applications are scheduled to close at 17:00 CET. (Finextra)
Money20/20 USA — October 18–21: The industry will likely provide another major checkpoint for developments in AI, payments, stablecoins and embedded finance. (FinTech Futures)

Sources: Finextra Research and FinTech Futures. Coverage window: September 14–20, 2026. Articles outside the seven-day window were excluded.