Bitcoin-Native AI Payments

Pay-Per-Request
Powered by Bitcoin

The x402 protocol on Stacks. Enable AI agents and machines to transact autonomously using sBTC, STX, and USDCx. No accounts. No API keys. Just HTTP + payment.

sBTCBitcoin-backed
STXNative Stacks
USDCxStable value
npm install x402-stacksGet Started

Why Bitcoin?
Why Stacks?

AI agents need trustless, permissionless money. Bitcoin is the most secure, decentralized network. Stacks brings smart contracts to Bitcoin without compromising its security model.

Bitcoin Security

$1T+ securing the network

Fast Finality

~30 seconds on Stacks

True Programmability

Clarity smart contracts

How It Works

Four steps. Milliseconds. Zero friction.

01

Request

Agent calls your API endpoint

02

402 Response

Server returns payment details

03

Sign & Pay

Agent signs transaction

04

Deliver

Instant access granted

Three Tokens. One Protocol.

Choose your settlement layer based on your use case.

sBTC

Bitcoin-backed

True Bitcoin settlement for high-value transactions and maximum security guarantees.

  • Bitcoin security
  • Decentralized pegging
  • High-value transactions

STX

Native Stacks

Ideal for ecosystem-native applications and stacking rewards integration.

  • Native gas token
  • Stacking rewards
  • Ecosystem native

USDCx

Stable Value

Perfect for predictable pricing models and fiat-denominated services.

  • Price stability
  • Fiat compatibility
  • Predictable costs

Built for the Agentic Economy

Enable any use case where machines need to pay machines.

AI Agent Payments

Autonomous agents pay for data, compute, and APIs without human intervention

Pay-Per-Request APIs

Monetize any endpoint with $0.001 microtransactions

Content Paywalls

Unlock articles, datasets, or media instantly

Machine-to-Machine

Seamless value transfer between autonomous systems

Start Building Today

One line of code. Instant monetization. Bitcoin-secured settlement.