Attribution

The code in this repository is MIT licensed (LICENSE). It is built on, and would not work without, the projects and data sources below, which keep their own terms.

Path of Exile is © Grinding Gear Games. This project is a free, non-commercial fan tool, and is not affiliated with or endorsed by Grinding Gear Games in any way.

Item names, modifier wordings, the clipboard format the game writes on Ctrl+C, and the stat identifiers a trade query is built from are GGG's. None of it is baked into the binary - it is downloaded at runtime from PathOfPriceCheck-Data, whose DATA-LICENSE.md states what that bundle contains and how it was derived. No game assets - images, sounds, models - are copied or redistributed anywhere in this project.

Only publicly accessible endpoints are used; this application is not registered with GGG, has no API key, and never asks the user for account credentials.

• It identifies itself. Every request carries a descriptive User-Agent naming the tool, its version and a URL that leads to a way of reaching the maintainer: PathOfPriceCheck/<version> (+https://github.com/JIRPOS/PathOfPriceCheck).
• It obeys the published rate limits rather than guessing at them. GGG returns the active policies in the response headers of every request (X-Rate-Limit-Rules, X-Rate-Limit-<policy>, X-Rate-Limit-<policy>-State, and Retry-After on a 429). Every GGG request goes through one shared limiter that parses those headers, tracks each window, and delays proactively instead of absorbing 429s. The server's own state counters outrank our tally, because they count every client on the address - the user's browser tab included.
• The limiter survives a restart. An active restriction is written to disk and restored on the next launch, so closing and reopening the application cannot be used - accidentally or otherwise - to walk out of a lockout it never served.
• Requests are made only when the user asks for them. A price check parses and displays the item without touching the network; the trade search is a button, and auto_search is off by default. Static data (leagues, currency symbols) is cached for 24 hours and a week respectively.
• It fetches in the batch sizes the API specifies - ten listing ids per /fetch request - and asks only for as many listings as the user configured.
• The in-game currency exchange feed is treated as its own thing. web.poecdn.com/api/currency-exchange is public and unauthenticated, and it is on the CDN rather than the API host - so it publishes no rate-limit policy, and it is deliberately not sent through the limiter above, which exists to serve budgets this endpoint does not state. What stands in for one is that a published hour never changes and one download covers every item in every league: the cost is per hour of play rather than per price check, and a digest already on disk is never re-fetched.

If anyone at GGG wants a change made here, an issue is the route and it will be actioned. See CONTACT.md.

The reference price row - what a unique, a gem, a currency item or a base type is currently going for - comes from poe.ninja, used under its public API documentation.

• Only the economy endpoints are touched. The builds and profile endpoints are explicitly closed to third parties and this application does not request them.
• Responses are cached aggressively, matching the 30 minutes poe.ninja sets on its own responses, revalidated with a conditional request so an unchanged overview costs a 304, and fetched once per category rather than once per price check.
• The site's own favicon is drawn as the row's source mark, and the row is a click-through to the item's page on poe.ninja, so the data is credited where it is shown and the reader can go to the source for the variants and history a single row has to leave out.

The data bundle's per-unique modifier dataset - which modifiers a given unique can roll, and which of them come from a random pool - is not in the game files. That grouping comes from poewiki's item_mods cargo table, licensed CC BY-NC 3.0: attribution required, non-commercial use only, which this project is.

The attribution string travels with the bundle rather than staying behind in the publisher's repository - the manifest carries it, the installer writes it through, and Settings renders it - because an attribution that does not reach the user is not an attribution.

The data repository decodes GGG's own .datc64 bundles with pathofexile-dat / poe-dat-viewer and dat-schema.

Awakened PoE Trade (MIT) is the tool this one is in the spirit of, and reading it is how several of the problems here were understood to be problems. No code is taken from it.

Fetched from source at pinned tags by CMake; none are vendored into this repository.

stb_truetype and stb_rect_pack (public domain / MIT) ride along inside Dear ImGui and rasterize all text.

The UI renders in Fontin by Jos Buivenga (exljbris), the typeface the game itself uses. Four faces are embedded in the executable.

Fontin is free for personal and commercial use, but its license nominally forbids redistribution without the author's permission, which bundling into a released binary arguably is. That is a deliberate maintainer decision with its reasoning written down in assets/fonts/README.md, along with how to swap the typeface out - it is one generated file and no code change. PPC_FONT_DIR already overrides the embedded faces at runtime. If you are Jos Buivenga and would prefer this not be bundled, open an issue and it will be removed.

For text this project did not write - trade account and character names, which are routinely Cyrillic, Hangul or CJK, none of which Fontin covers - a fallback face is loaded from whatever the operating system already ships. Nothing is bundled for it and nothing is redistributed.

The buttons a word does not fit on are drawn in Font Awesome Free Solid, by Fonticons, Inc. Only the codepoints actually used are bundled - scripts/fetch-glyphs.sh subsets the release down to those and no more, and assets/fonts/README.md says which and why. The website's navigation icons are the same set, inlined into site/style.css rather than fetched from anywhere.

Icons are CC BY 4.0 and the fonts are SIL OFL 1.1; both permit redistribution with attribution, which this section is. The full text is fetched to assets/fonts/FontAwesome-LICENSE.txt.

assets/popc_icon.png and the .ico generated from it are part of this repository and covered by its MIT license.