二手清单 · Secondhand List
Sell your stuff without answering every message. Snap a photo, post one link to your groups, and buyers line up themselves.
Live: https://secondhandlist.org
出二手，不用一个个回消息：拍照上架，一个链接发到微信群、Telegram 群，想要的人自己排队预订。免费、不用注册、不用下载。
What it does
- Photo in, item out. Snap a photo and Workers AI names the item. Add a price and it is listed.
- One link for every group. The same list goes to any number of WeChat or Telegram groups. Mark something sold once and every link is up to date.
- A queue, not a chat. Buyers tap Reserve and leave a WeChat ID or Telegram username. Only the first in line sees the seller's contact; if they drop out, the next one moves up.
- Chinese and English. The UI is bilingual, and item names and details are translated automatically.
- Nearby. Lists can show up under other lists in the same area, so things sell faster.
- No accounts. Sellers manage a list with a key kept in their browser and in the management link they save.
How it is built
- One Cloudflare Worker (src/worker.js) serves the pages and the API.
- D1 (SQLite) stores lists, items and queues; schema in migrations/.
- Workers AI recognizes photos and translates text.
- The front end is plain JavaScript modules in public/, with no framework and no build step.
Run it locally
You need Node.js 20+ and a Cloudflare account.
npx wrangler login
npm run migrate:local
npm run dev
Then open the address wrangler prints (http://localhost:8787 by default). Tests run with npm test.
Deploy your own
- Create a D1 database (
npx wrangler d1 create <name>) and put its name and ID in wrangler.toml.
- Apply the migrations:
npx wrangler d1 migrations apply <name> --remote.
- Optional settings in
wrangler.toml under [vars]:
SITE_ORIGIN: your own domain, which pages on workers.dev move to; empty to serve pages on every address. Change or remove the routes for secondhandlist.org too.TIP_URL: your own tip page (Ko-fi, etc.), or empty to hide it.
- Optional secret:
npx wrangler secret put INVITE_CODE gives unlimited AI photo recognition to people who enter the code.
npm run deploy.
If you deploy a copy, replace public/tip-qr.png (my WeChat tip code) and TIP_URL with your own, and update the contact email in public/privacy.html and public/terms.html.
Support
Secondhand List is free with no ads. I pay for the server, the domain and the AI myself. If it helped you, you can tip on Ko-fi or with WeChat:
Bug reports and ideas are welcome as issues, or through the Feedback button in the app.
License
MIT © Jinda Li
