portage-cli

Ships the portage executable — one CLI command to buy from any store, native UCP or not.

portage buy https://your-shop.example --query "snowboard" --qty 1 --payment-token spt_1a2b3c...

portage buy <url>:

Tries native UCP discovery first (GET /.well-known/ucp, then a <link rel="ucp">-style tag on the homepage) — zero credentials, works on any store that's opted in.
Falls back to a portage-ucp-<platform> adapter only when this process already has that platform's own credentials in env — i.e. it's your own store, or one you're integrated with.
Otherwise says so plainly and stops — never scrapes or session-hijacks as an anonymous shopper. That fallback path is a ToS violation this gem deliberately refuses to take.

Don't have a URL? portage find asks a search backend which stores might sell the thing, keeps the ones that answer /.well-known/ucp, and lists what they actually stock:

portage find --query "burton snowboard" --max-price 400

portage buy with no URL runs that search and then buys the offer you pick.

Depends on portage-ucp (for platform detection via Resolver) and portage-ucp-client (for the actual buy calls). No single adapter gem is a hard dependency — install whichever portage-ucp-<platform> gem matches the store you're integrated with, if any.

Installation

# Gemfile
gem "portage-cli"

bundle install

Or standalone:

gem install portage-cli

Usage

portage buy <url> --query "..." [--qty N] [--payment-token TOKEN] [--product-id ID]
                                [--yes] [--dry-run] [--json]
portage buy --query "..." [--store URL] [--max-price N] [--limit N] ...
portage find --query "..." [--max-price N] [--limit N] [--json]

--query — search term. Against the store's catalog when you name a store, against the search backends when you don't.
--qty — quantity, default 1.
--payment-token — a tokenized payment credential (never a raw card number — PaymentTokenGuard in the core gem rejects those before they reach the wire). Omit for --dry-run or to just browse.
--product-id — buy exactly this product rather than whatever the catalog search ranks first. If the id isn't in the results, nothing is bought.
--store — name the merchant without giving a full URL; skips the search.
--max-price — in major units (400 means 400), compared per offer in that offer's own currency. No FX conversion.
--limit — how many candidate stores to probe, capped at 12.
--yes — skip the confirmation prompt before completing checkout.
--dry-run — resolve and price the order without completing checkout.
--json — machine-readable report instead of the human-readable summary.

Exits 0 when a checkout completed (or a dry-run/browse/search resolved successfully), 1 otherwise — including the "no native manifest, no adapter credentials" dead-end case, so it's scriptable in CI.

Buying without a URL

portage find and URL-less portage buy share one pipeline:

Ask the backends which stores might sell it (see below).
Probe each candidate origin for /.well-known/ucp, one request each, throttled, with results cached in ~/.portage/discovery-cache.json (misses for a day, hits for six hours) so repeat searches don't re-probe the same hosts. A tool that fans out an unsolicited request per host per invocation is a crawler; this one isn't.
Search the survivors' catalogs and merge the offers, buyable stores first, then cheapest.

--yes is not enough to buy from a search result. With a URL you chose the merchant; without one a search ranker chose it, so the merchant has to be named by a person — either --store, or an interactive pick from the listed offers. A piped or CI run with no --store prints the offers and stops.

Search backends

Every backend talks to a documented API. None of them parse a results page: scraping a search engine is the same class of ToS violation portage buy already refuses to commit against a merchant.

Backend	Credentials	Notes
Allowlist	`~/.portage/stores.yml` (YAML array of URLs) or `PORTAGE_STORES` (comma-separated)	Stores you already trust. Checked first, costs no network call.
DuckDuckGo	none	The Instant Answer API. Answers entity queries, not web queries: `burton snowboards` resolves to burton.com, `snowboard` resolves to nothing.
Brave	`BRAVE_SEARCH_API_KEY`	Real web results. Set this up if you want open-ended queries to work.
Google	`GOOGLE_CSE_KEY` + `GOOGLE_CSE_CX`	Programmable Search JSON API.

Backends that have no credentials sit out; DuckDuckGo is the keyless default because it's the only no-key engine with a real API, and its narrowness is the price of not scraping.

Development