The Ecosystem Watch
Short, current posts tracking what's being built across the agentic payments landscape. Protocols moving from spec to production, players making meaningful moves, and inflection points worth paying attention to.
Circle's Post-Quantum Roadmap: what it means for agentic payments
Circle has published a phased blueprint for migrating USDC and blockchain infrastructure to post-quantum cryptography. Every agentic payment protocol running today — x402, AP2, ACP — depends on the cryptographic primitives this roadmap replaces.
Coinbase x402: the protocol changing how APIs get paid
Coinbase open-sourced their x402 implementation and it's moving fast. We track the current spec, adoption across major API providers, and what the protocol looks like a year in.
Stripe MPP goes live: what it means for agentic commerce
Stripe's Machine Payments Protocol (with Tempo for stablecoin settlement) is live on 100+ services. What it covers, what it doesn't, and how it positions against x402 for different use cases.
Google AP2: FIDO authentication meets machine payments
AP2 brings FIDO-standardised delegated authority to AI-initiated payments — human approval gates without human latency. Current adoption status, reference implementations, and what Google is building around it.
OpenAI + Stripe ACP: ChatGPT Shopping is just the beginning
The Agentic Commerce Protocol is live on Shopify, Etsy, and Walmart. What ACP actually specifies, how it handles delegation and dispute, and why the IoT/wearable angle is the more interesting long-term play.
The race to own the agent wallet
Every major payments company is announcing an agent wallet product. We map the landscape — Coinbase, Stripe, Visa, Mastercard, Revolut — and assess which approaches have architectural advantages versus which are just rebadged products.
A2A + x402: what the Linux Foundation extension actually enables
The a2a-x402 extension wires agent communication (A2A Protocol) to machine payments (x402) in a single flow. We look at the reference implementation and the class of multi-agent workflows it unlocks.
The x402 ecosystem update drops first
Where x402 is today — adoption, spec changes, and what's coming. Short, current, no fluff. Get notified when it's live.