Definitions, in one line each.

Each definition below is written to be quoted as it stands. They describe the paid-link route, the traffic reporting around it and the discovery files on this site. For the mechanism end to end, read how AI visits pay. Last reviewed: 2026-10-10.

AI agent

Software that carries out a task for a user, such as finding a price or completing a purchase, by making its own requests to sites and APIs.

AI crawler

An automated program run to fetch pages in bulk, either to build a search or training index or to answer a question at the moment it is asked.

Base

The Ethereum-compatible network this site's paid route is configured to settle on, identified as chain 8453.

Facilitator

A service that verifies a payment authorisation on the server's behalf, so the site does not have to operate its own blockchain verification.

HTTP 402 Payment Required

The HTTP status code reserved for payment conditions. A server returns it to say that the requested resource is available for a price rather than for free.

llms.txt

A plain-text file at a site's root that gives language models a short, structured index of the site's pages and what each one covers.

Monetized link

A link whose response depends on a payment condition: the visitor is quoted a price, and the content is released only after that payment is verified.

Payment offer

The machine-readable price a paid endpoint returns to a visitor, naming the amount, the token, the network and the address that receives the payment.

Per-request pricing

Pricing a resource by the request instead of by an advertisement impression. The price travels with the resource, so every requester sees the same amount.

Receiving address

The public address configured to accept payment for a resource. The paid route settles to that address and has no bank payout step.

Settlement

The point at which a payment is recorded on the network and the funds become the recipient's. A signed authorisation on its own is not settlement.

Sponsored placement

A link or banner paid for by a partner programme. An affiliate pays on a qualifying sale, a sponsor pays for the placement, and payment follows that programme's own terms and timing.

Traffic classification

Separating automated requests from human visits for reporting. Here it records a visitor type, and it never grants or denies access.

USDC

A digital token designed to hold the value of one US dollar, used here for per-request payments.

User-agent

The text a client sends to identify itself. It can be copied by anyone, so it is treated as reporting data and never as identity or authorisation.

x402

An open convention for charging for a request over HTTP: the server answers with the price and payment details, the client returns a signed authorisation, and the resource is released once the payment settles.