Get Paid in
Stablecoins

Process USDT, USDC, and DAI across Ethereum, Polygon, Solana, and Tron. Funds go directly to your wallet—no custody, no intermediary. For free.

Learn more about our address pool technology

Get Started
4
Blockchains
7+
Stablecoins
100%
Non-Custodial
PayIn Admin Dashboard
AI-Powered Integration

Build with AI. Operate with AI.

Use the PayIn MCP Server with Claude Code, OpenAI Codex, Gemini CLI, or any MCP-compatible tool.

AI Coding Assistant

Ask AI to help you:

"Add USDT payment option alongside my existing Stripe integration"
"Create a webhook handler to update order status when payment completes"
"Generate TypeScript types for PayIn API responses"
"Set up a payment link that accepts both USDT and USDC"
"Add deposit address binding for user wallets"

Supported AI Tools

Claude CodeOpenAI CodexGemini CLICursor+ Any MCP-compatible tool
Install PayIn MCP

Accept USDT, USDC, and more. Cover 95%+ of crypto users.

Support major stablecoins across popular blockchains. Your customers pay directly without swapping tokens or bridging chains.

Stablecoin Market Share

USDT + USDC = 90% of stablecoin market

Stablecoin Distribution by Chain

Ethereum + Tron = 80% of stablecoin supply

Accepted Stablecoins

USDT
USDT
USDC
USDC
DAI
DAI
PYUSD
PYUSD
FDUSD
FDUSD

Supported Blockchains

Ethereum
Ethereum
Tron
Tron
Solana
Solana
Polygon
Polygon
Arbitrum
Arbitrum
BNB Chain
BNB Chain

Market data source: CoinLaw, CoinGecko, DefiLlama (May 2025)

Your money. Your control.

PayIn monitors blockchain data and sends notifications. Funds flow directly to you.

Custodial Platforms

User
USDT

Platform

USDT
You

Platform controls your funds

• Account freeze: Platform can freeze your funds anytime

• Bankruptcy risk: If platform fails, your funds may be lost

• Withdrawal limits: Delays and restrictions on accessing funds

• KYC required: Must verify identity to access your money

PayIn (Non-Custodial)

User
USDT
You
Blockchain Data
PayIn
Notification

No freeze, no limits, no KYC

You hold the private keys

Generate addresses from your mnemonic phrase. Full control over your funds.

Funds go directly to your addresses

Payments land in wallets you control. No intermediary custody.

PayIn goes down? Funds stay safe

We only monitor transactions. Your assets remain under your complete control.

Learn more about our address pool technology

Best for Gaming & Membership. Deposit like exchange.

Give each user a permanent deposit address. They can top up their balance anytime, unlimited times, directly from their own wallet.

Gaming: Permanent Deposit Address
Players save their address and top up game balance anytime
Others
Not supported
PayIn
Fully supported
Gaming: Recurring Top-ups
Same address for Week 1, Week 4, Month 3... unlimited times
Others
Need new link each time
PayIn
Same address forever
Membership: Monthly Renewals
Members renew subscription using the same address every month
Others
Generate new link monthly
PayIn
Set once, pay forever
User Experience
How users remember and use payment method
Others
New checkout flow every time
Like traditional e-commerce
PayIn
Save address like Steam wallet
Familiar crypto exchange UX
One-time Checkout (E-commerce)
Traditional payment link for single purchases
Others
Supported
PayIn
Also supported
Learn More

Free • No credit card required

HTTP 402 Protocol

Supports HTTP 402
Payment Required Standard

Best for AI Agent Economy

PayIn natively supports the HTTP 402 Payment Required standard, enabling seamless machine-to-machine payments for the emerging AI agent ecosystem.

1

Request Resource

AI agent requests a paid API endpoint or service

GET /api/premium-data
2

402 Response

Server responds with HTTP 402 and payment details

402 Payment Required
+ Payment address & amount
3

Auto Payment

Agent pays automatically and retries the request

Payment Sent

Built for AI Agent Economy

As AI agents become autonomous economic actors, they need a payment protocol that works without human intervention. HTTP 402 enables true machine-to-machine commerce.

  • No human approval — Agents pay autonomously
  • Micropayments friendly — Pay per API call
  • Standard protocol — Works with any HTTP client
agent-wallet.py
response = requests.get(
  'https://api.example.com/data'
)

if response.status_code == 402:
  payment_info = response.json()
  wallet.pay(
    payment_info['address'],
    payment_info['amount']
  )
  # Retry request
  response = requests.get(
    'https://api.example.com/data'
  )
Learn More

Free • No credit card required

Start accepting
stablecoins today

Start Building Free

No credit card required • Free forever