Agent rails
One rail for machine money: x402, MPP and ERC-8004.
An AI agent or an application finds a service, pays for one call in USDC, gets the answer with a signed receipt, and can check which agent it is dealing with. Most of what we build connects here. This page shows what is live and where to check each piece.
Three standards
How the pieces fit
x402
Pay per call over the web
A service answers “402 Payment Required” with its price. The caller signs a USDC transfer on its own device and retries. The service settles and answers, with a signed receipt. No account, no API key.
MPP
A second payment handshake
The Machine Payments Protocol (the “Payment” HTTP scheme, a published draft) runs on the same rail, so agents built for either standard can pay the same endpoints.
ERC-8004
Identity for agents
Our service agent is registered as agent 95721 on the ERC-8004 identity registry on Base, with five operator agents alongside it, so a counterparty can check which agent it is transacting with.
Live today
What is running, and where to check it
| Piece | What it is | Check it |
|---|---|---|
| Paid endpoints | 365 pay-per-call endpoints on twin.unykorn.org: company and sanctions checks, chain reads, market and research data, web and text tools. Every one answered 402 with its price in a full sweep on 30 September 2026. | Manifest · OpenAPI |
| Payment lanes | USDC on Base, Polygon and Solana over x402; USDC on Stellar for flat-priced calls; MPP on the same endpoints; prepaid credit packs. | Lanes in the manifest |
| Signed receipts | Every paid call returns an Ed25519-signed receipt. Anyone holding a result can check on a public page that it was issued by our key and has not been changed. | A live receipt · Published key |
| Agent identity | Genesis402 is agent 95721 on the ERC-8004 identity registry on Base; operator agents 96492, 96494, 96495, 96496 and 96497 sit alongside it, each with a public page. | Agent pages · Registry on Basescan |
| Counterparty check | One call resolves a company in the GLEIF register, follows its registered parent companies, and screens every name against the UN, OFAC, EU and UK lists, pulled from the official sources. Clear, review or stop, with the reasons, a branded PDF and the signed receipt. $0.25. Screening signals, not KYC or legal advice. | The Examiner agent |
| For AI agents | A hosted MCP server and the genesis402-mcp package (0.3.8, 21 tools) let an agent discover the endpoints, see the price first, and pay with its own wallet. | npm · MCP Registry |
| Member wallet | Keys stay on the member's own device; the wallet pays x402 calls under a per-member cap. Invitation only. | wallet.unykorn.org Private testers |
| Introducer network | Each member gets a page, a card and a QR code; every introduction is recorded to them with the date. New members are approved by the founder. UnyKorn pays nothing per introduction or deal. | brokers.unykorn.org |
Where it is listed
Public indexes that list the rail
| Index | What is listed |
|---|---|
| x402scan | The rail, with all 365 resources, registered by the treasury wallet that receives the payments. |
| MCP Registry | io.github.FTHTrading/genesis402-mcp, version 0.3.8. |
| npm | The genesis402-mcp package an agent installs. |
| Glama | The hosted MCP connector. |
Coinbase's x402 Bazaar indexes an endpoint once a paid call to it settles through Coinbase's facilitator, so its count grows with real use.
Held to account
We attack it before we ask anyone to rely on it
Adversarial review
The payment code was reviewed from an attacker's point of view on 30 September 2026. Every fix shipped with a test that failed first, and a second, independent reviewer checked the fixes before they were final.
Always on
The rail runs on dedicated always-on infrastructure, not a laptop, and every change is checked against the live service after it ships, not only in the code.
Non-custodial
Per-call payments settle on chain, straight from the caller's wallet to ours. We do not hold client assets, and there is no customer account or password in the payment path.
Built for others too
Want your own API paid per call by AI agents?
We build the same rail for other companies: x402 and MPP payment, ERC-8004 agent identity, signed receipts and the listings, on your own infrastructure and wallet. Fixed scope, quoted in writing after a free scoping call.
Start with a free 30-minute scoping call.
Send the intake form and whatever documents you already hold. You will receive a scoping call within two business days and a written screen result within 48 hours of the documents arriving.