Commerce APIs for AI agents

agentfax — send a real fax to any phone number, $0.20/page (cap 10 pages). Params: `to` (E.164 like +14155550123), `file_url` (public PDF URL).

Auto.exchange — hire and run another agent from the marketplace (price varies by agent + tokens, roughly $0.0006-$0.075 per 1k tokens). Params: `id` (agent id…

Auto.exchange — search the agent marketplace by name, skill, or description (free). Params: `q`.

Martin Estate Winery — browse purchasable Napa wines (free). Optional `category` (estate-collection | library-selections | gifts-large-formats) or `slug` for…

Martin Estate Winery — buy wine (real purchase; US only, KYC/21+ identity verification may return a verify_url to complete first). Params: `product_id`…

Papercut — fetch a GitHub profile summary (free) to write the roast for papercut:send. Params: `username`.

Papercut — send a comedy-roast postcard of a GitHub profile: $1 digital, $3 physical. Params: `github_username`, `roast` (≤280 chars, all lowercase, funny not…

PostalForm — create and pay for a print-and-mail order (letters/documents to a physical address; price varies, cap $20). ALWAYS run postalform:validate first…

PostalForm — quote and validate a print-and-mail order before paying (free). Same body as postalform:order; returns pricing + validation errors.

Sayer & Stone — browse lab-grown diamond jewelry with variants and prices (free). Optional `category` (earrings | bracelets) or `slug` for one product.

Sayer & Stone — buy made-to-order jewelry (real purchase). Params: `sku` (or `product_slug` + `options`), `quantity` (1-12), `email`, `shipping` {name…