Gateway & dashboard
Register upstream APIs, price routes, and publish a paid gateway hostname from the seller dashboard.
- Custom domains + DNS
- OpenAPI import
- Analytics & settlements
The definitive pay as you go solution, using stablecoins, for humans and AI agents
Choose your path
Start where your team ships
Gateway configuration for API sellers and SDKs or agents for developers.
SDKs, CLI & agents
Automate the control plane, pay gateway URLs from your app, or wire x402 into CI and agent workflows.
- TypeScript, Go, Python
- Buyer pay-and-fetch
- CLI + MCP for agents
Architecture
Seller → gateway → facilitator → buyer
One verify-and-settle flow for every buyer integration path.
Sellers
Payment rail
HTTP 402 challenges route buyers through your gateway; the facilitator settles on-chain.
x402
Partners
Building the x402 ecosystem together
We partner with stablecoins, protocols, and platforms to expand what x402 payments can do.
ZCHF — now in the x402 ecosystem
Ax402 is partnering with Frankencoin to bring ZCHF, the Swiss franc stablecoin, into the x402 payment ecosystem.
Learn about Frankencoin
xGAS — Neo X enters the x402 ecosystem
Ax402 integrates Neo X through xGAS, a wrapped GAS token built for on-chain payments in the x402 stack.
Learn about xGASInterested in partnering? Get in touch
FAQ
Questions, answered
Everything you need to know before publishing your first paid gateway.
Still stuck? Contact us or read the docs.
x402 is an open HTTP payment standard. Unpaid requests to a priced route return HTTP 402 with machine-readable payment requirements. After the buyer signs and settles on-chain, the gateway retries and serves your upstream response.
Start with the platform — extend with SDKs and the paywall.
Create a seller account, publish a paid gateway, or jump straight into the SDK and React paywall docs.