Prepare your product to sell to agents.

Add x402 payments to HTTP APIs and MCP tools. Agents pay per request without signing up; Infi verifies and reconciles without taking custody of funds.

Start building Back to the platform

Infi Rail is in Early access. Confirm available flows, networks and assets before integrating.

HTTP / x402402 → 200

GET /v1/research

HTTP/1.1 402 Payment Required
price: 0.005 USDC
network: base
payTo: 0xMerchant

X-PAYMENT: eyJ...
HTTP/1.1 200 OK

Conceptual flow · not an Infi endpoint

Agentic commerce

Software selling to software.

Rail makes an HTTP call or an MCP tool a programmable unit of revenue.

Per-request payments

Charge per query, dataset, execution, tool or unit of compute.

No agent signup

The x402 protocol carries payment authorization with the request itself.

No custody

The agent authorizes USDC to the seller's designated wallet, not to Infi.

HTTP and MCP

Protect endpoints and tools while keeping the contract compatible with x402 clients.

How it works

One request. One payment. Work continues.

01
The agent requests
Your API returns 402 with the price, network, asset and destination wallet.
02
The agent authorizes
The next attempt includes signed x402 authorization in the request.
03
Rail confirms
Infi verifies, records and reconciles; settlement goes to your wallet.

Product direction

Financial infrastructure for people and agents.

AiFi lets agents participate in the economy within permissions set by people and businesses. Infi Rail is Infi's product for agentic commerce.

infi.rail

x402 for per-request payments
USDC on Base as an initial focus; confirm availability
A facilitator connected by the seller
Agent-readable discovery and integration

Prepare your product for agentic commerce.

Explore Rail Early access and confirm availability for your product.

Start building Read the docs