Accept stablecoin payments from AI agents. Zero fees. Three lines of code.
Drop in one middleware. Agents pay per request in USDp, USDC or sUSDp. No signup, no platform fee, funds settle straight to your wallet.
Both Sides of the Call.
Why Parallel x402
Free, no platform fee
The facilitator costs nothing. We don't take a cut of your revenue. Funds settle straight to your wallet: no Cooper Labs account, no holding period, no withdrawal flow.
We pay the gas
1,000 sponsored transactions per agent per month on Base, HyperEVM, and Avalanche. Your customers don't need ETH, MetaMask popups, or a crypto tutorial. They just pay.
Stablecoin-native, x402-compatible
Drop-in for the open x402 standard. Accepts USDp, USDC and sUSDp. Migrate from any other x402 facilitator in one line.
How Parallel x402 compares
| Stripe | Parallel x402 | Coinbase x402 | |
|---|---|---|---|
| Setup time | DaysKYB required | Minutes | Minutes |
| Platform fee | 2.9% + $0.30 | 0% + gas sponsored on Base, HyperEVM and Avalanche | 0% + gas |
| Agent-native | Nocards only | Yes | Yes |
| Settles to | Bank account | Your wallet, any major stable | USDC wallet |
| Stablecoin support | None | USDC, USDp, sUSDp, others | USDC only |
| Cross-chain | No | Base, Ethereum, HyperEVM, Avalanche | Limited |
- Setup time
- Minutes
- Platform fee
- 0% + gas sponsored on Base, HyperEVM and Avalanche
- Agent-native
- Yes
- Settles to
- Your wallet, any major stable
- Stablecoin support
- USDC, USDp, sUSDp, others
- Cross-chain
- Base, Ethereum, HyperEVM, Avalanche
- Setup time
- DaysKYB required
- Platform fee
- 2.9% + $0.30
- Agent-native
- Nocards only
- Settles to
- Bank account
- Stablecoin support
- None
- Cross-chain
- No
- Setup time
- Minutes
- Platform fee
- 0% + gas
- Agent-native
- Yes
- Settles to
- USDC wallet
- Stablecoin support
- USDC only
- Cross-chain
- Limited
What people are building with x402
Monetize an OpenRouter wrapper
Wrap OpenRouter with metered pricing. Agents pay per token. No platform between you and your revenue.
Sell a paid MCP server
Charge for premium MCP tools. Claude Desktop and Cursor users pay per call.
Run a paid data API
Scraping, search, embeddings: charge per request with zero overhead.
Build agent-to-agent commerce
Let agents transact with each other. Autonomous shopping, autonomous data exchange.
Routes visualization
The SDK picks the best route automatically. You set a price. We handle conversion.
Routes visualization
The SDK picks the best route automatically. You set a price. We handle conversion.
Migration from Coinbase x402
−import { paymentMiddleware } from 'x402-express';+import { paymentMiddleware } from '@parallel-protocol/x402/express';−app.use(paymentMiddleware(− '0x71C7656EC7ab88b098defB751B7401B5f6d8976F',− { '/api/search': { price: '$0.01', network: 'base' } },− { url: 'https://x402.org/facilitator' }−));+app.use(paymentMiddleware({+ facilitator: { url: 'https://agents.parallel.best' },+ routes: {+ '/api/search': {+ price: '0.01',+ network: 'base',+ payTo: '0x71C7656EC7ab88b098defB751B7401B5f6d8976F'+ }+ }+}));
What people ask
Yes. The hosted facilitator at agents.parallel.best is free to use. We don't take a cut of your revenue. You pay only your own gas costs, and we sponsor those on Base, HyperEVM and Avalanche (1,000 transactions per agent per month).
No. There's no signup, no KYB, no Cooper Labs onboarding. Funds settle directly to the wallet address you control. You can start accepting payments in 5 minutes.
An agent pays in USDp, USDC or sUSDp. A merchant can accept those, plus other major stables on chains where the Parallelizer is deployed (Base, Ethereum, HyperEVM, Avalanche), and picks which tokens to accept. The agent chooses which of its three tokens to pay with, or lets the Parallel SDK select the best route automatically.
Stripe charges 2.9% + $0.30 per transaction and only accepts credit cards. AI agents don't have credit cards. The Parallel x402 facilitator is free, accepts stablecoins, and is built for the agent economy.
The smart contracts that settle every payment are audited by Bailsec, Cyfrin and Certora. The reports and bug bounty scope are published on the security page.
About 3.5 seconds on Base, in Parallel's own test with real payments (October 2026), down from 9.4 seconds. The agent signs the first payment of a process in about half a second; the rest is the facilitator's verification, your handler and the on-chain settlement.
@parallel-protocol/x402 0.8.2 or later. The facilitator only settles a payment that presents the settle token it issued at verification, which versions before 0.8.0 do not carry, and 0.8.2 extends to more failure reasons the 402 that tells the agent to check with you before it pays again. Agents use @parallel-protocol/x402-fetch 0.4.0, which a fresh install gets with the Parallel CLI 0.5.0: one signing engine per wallet, kept between payments, signs simultaneous payments concurrently. Since 0.3.0, a paid request the merchant answers with a 402 fails with an X402FetchError that carries the merchant's reason, instead of returning the response. Since 0.3.1, that error tells the agent to check with the merchant before paying again whenever the payment may have gone through.
That the payment pays your payTo address, in the asset and on the network your route asks for, and covers your price. Each payment settles once: a repeated settlement returns the recorded result, never a second transfer. If a settlement fails, the SDK answers the agent with a 402 that says PAYMENT_SETTLEMENT_FAILED and gives the reason.
Start accepting stablecoin payments in 5 minutes
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