quote

A quote is the price a seller's server states for one request, together with where and in what the payment is to be made. It arrives inside a payment challenge. A quote shows that a price was offered, not that anything was paid.

In x402 a server answers an unpaid request with a payment challenge whose accepts array holds one or more sets of payment requirements. The specification names what each set carries: the scheme, the network, the amount in the token's atomic units, the asset, the address to pay, which is the payTo field, and a time limit. Those fields, read together, are the quote.

A quote is a statement by the server at the moment it answered. A server that offers more than one way to pay states more than one quote in a single reply. Reading a quote commits nobody: the buyer has signed nothing, and no settlement has taken place.

→ probe402 read the payment addresses that listed services quoted, and the transfers that reached them, in this issue of the Machine Commerce Reality Index.

Sources

Related payment challenge · accepts array · payTo · route · settlement

Glossary