Today's payment systems process transactions one at a time through a single queue. Fast eliminates that bottleneck entirely — enabling millions of simultaneous transactions with mathematically proven correctness.

Billions of AI agents are coming online. They'll transact at machine speed — executing micropayments, settling trades, and coordinating economic activity every millisecond of every day.

The problem: No payment system exists that is both globally permissionless and infinitely scalable.

• Traditional rails (Visa, Stripe, PayPal) are fast but centralized — agents can't open bank accounts or get credit cards
• Decentralized systems force all transactions through sequential ordering, creating an inherent throughput ceiling

Fast solves this. By requiring only local ordering (per-account sequencing) instead of global ordering, independent transactions process in parallel — simultaneously and without coordination.

⚡ Fast — Parallel Settlement Layer
The core infrastructure. Parallel execution of payments with instant finality and mathematically proven correctness. Not a faster blockchain — a fundamentally different architecture.

🌐 AllSet — Unified Liquidity
Capital becomes globally usable. Ownership is portable across apps, networks, and venues — without moving assets. Agents access liquidity wherever it exists.

🖥️ Fast Terminal — Agent Payment Interface (Coming Soon)
Where agents execute payments at machine speed. The interface layer for autonomous commerce.

npm install @fastxyz/sdk

import { Fast } from '@fastxyz/sdk'

const fast = new Fast({ apiKey: 'your-api-key' })

// Send a payment — settles in <100ms
const tx = await fast.pay({
  to: 'agent-or-address',
  amount: '1.00',
  asset: 'USDC'
})

📖 Read the Docs · 🔑 Get API Access · 💬 Join the Community

• Agentic Payments — AI agents transacting autonomously at machine speed: paying for services, settling trades, splitting costs
• Agent Marketplaces — Infrastructure for autonomous commerce at scale where agents offer and purchase services
• Cross-App Trading — Agents execute strategies across multiple venues simultaneously with unified liquidity
• Micropayments — Millions of sub-cent transactions per second for AI micro-services
• Stablecoin Settlement — Real-world assets and stablecoins moving at internet speed
• Human-to-Agent Payments — Seamless flows between people and the agents working on their behalf

Fast is built on a breakthrough in distributed systems: you don't need global transaction ordering to prevent double-spending. You only need local ordering — each account's transactions in sequence, while independent transactions happen in parallel.

This insight, published in peer-reviewed research and built on the Actor Model, eliminates the scalability ceiling that every blockchain inherits from Bitcoin's 2008 design.

• Embarrassingly parallel — scales linearly with hardware
• Formally verified — mathematical proof of correctness, not probabilistic security
• No consensus bottleneck — independent transactions never wait for each other
• Byzantine fault tolerant — secure against malicious actors

Grigore Roșu — IEEE Fellow, AAAS Fellow. Former NASA researcher. Professor at UIUC. Creator of the K Framework and Matching Logic. Founded Runtime Verification. Built formal verification tools used across the industry.

Sriram Vishwanath — IEEE Fellow. Professor at Georgia Tech. Five startups, three successful exits. Expert in information theory and distributed systems.

Fast is developed by Pi2 Labs — the research arm building the mathematical foundations for the agentic economy.