$0.001
floor
$1.00
cap
On-chain
atomic split
yncPayThe Universal Payment Layer for AI Agents
XyncPay translates payment instructions between x402, MPP, and AP2 so any agent can pay any service, regardless of which protocol either party uses.
Circle Alliance Program·Member→Protocol Translation
One layer. Every protocol.
Agents and services speak different payment protocols. XyncPay bridges them through a canonical translation layer, with no protocol lock-in.
Inbound Protocols
x402
Coinbase
MPP
Stripe / Tempo
AP2
Translation
XyncPay
Translation Layer
Settlement
FeeSplit Contract
Base (EVM)
FeeSplit Contract
Arc Testnet
USDC Settlement
Atomic fee split
Solana Programs
Coming Soon
How It Works
Three steps. Zero custody.
01
Agent submits request
An agent sends a payment translation request specifying source protocol, target protocol, amount, and recipient.
02
XyncPay translates
The translation engine normalizes the request into a canonical format, calculates the fee, and builds an unsigned transaction.
03
Agent signs and settles
The agent signs the transaction with its own private key and submits to the blockchain. XyncPay never touches funds.
Supported Protocols
Every protocol. One integration.
x402
Coinbase
HTTP 402-based payment protocol for pay-per-request APIs. EIP-3009 authorization with ERC-20 token transfers on Base.
Settlement:Base (EVM)
MPP
Stripe / Tempo
Session-based micropayment streaming protocol. Spending caps, rate limits, and continuous payment flows for agent workflows.
Settlement:Tempo
AP2
Cryptographically-signed mandate protocol. Inbound parsing active; outbound routes through x402 or MPP at launch.
Settlement:Via x402/MPP
Fee Structure
Transparent, on-chain, configurable
1%
per transaction
| Provider | Rate | $100 txn |
|---|---|---|
| XyncPay | 1.0% | $1.00 |
| Stablecoin processors (typical) | 1.5% | $1.50 |
| Traditional card processing | 2.9% + $0.30 | $3.20 |
Fee rate is owner-configurable via the FeeSplit smart contract without redeployment.
On-Chain Proof
Production and testnet, fully verified
Every protocol path settles through a verified FeeSplit contract with atomic fee splitting. Transactions below are live on-chain and publicly verifiable.
Live on MainnetBase Mainnet
Live USDC Payment
End-to-end settlement through FeeSplit on Base mainnet. Net to payee plus atomic fee split, confirmed on-chain.
0x8eed8f56...096185 ↗Verified contract: 0x1bd714Fb...e125Cb
TestnetArc Testnet
Agent-to-Merchant Payment
Demo Agent pays Demo Merchant via FeeSplit on Arc testnet. Atomic split of 0.099 USDC net plus 0.001 USDC fee in a single transaction.
0x65271a96...b4ec5 ↗Verified contract: 0xadE1607a...23eE4
Arc mainnet beta launch planned for 2026.
For Developers
One API call. Any protocol pair.
Submit a payment request, receive an unsigned transaction. Your agent signs and submits. XyncPay never sees your private key.
Request
POST/v1/payments/translate
curl -X POST https://xyncpay.com/api/v1/payments/translate \
-H "Content-Type: application/json" \
-H "X-Wallet-Address: 0xYourAgent..." \
-H "X-Wallet-Signature: 0xSig..." \
-d '{
"sourceProtocol": "x402",
"targetProtocol": "mpp",
"payeeAddress": "0xService...",
"amount": "1000000",
"currency": "USDC",
"chain": "base"
}'Response
201application/json
{
"data": {
"paymentId": "pay-a1b2c3d4...",
"feeAmount": "10000",
"netAmount": "990000",
"unsignedTransaction": {
"chainId": 8453,
"to": "0x1bd714Fb...e125Cb",
"data": "0xb3d76188...",
"value": "0",
"gasLimit": "150000"
}
}
}Build with XyncPay
Open access. No waitlist. Authenticate with your wallet and start translating payments across protocols in minutes.