Crawling & Data Use Policy
Short version: we want you to read this site. Search engines and AI retrieval crawlers are explicitly welcome on all public pages. What we do not permit is lifting the database wholesale, or circumventing the limits we publish. Questions about bulk access? Write to us — we would rather license it to you than fight about it.
1. Why we are open
UCUN is a listing and matchmaking platform for home-textile stock and finished goods, based in the Nantong home-textile cluster, Jiangsu, China. We deliberately publish machine-readable product data — structured fabric specifications, multi-language server-rendered pages, an OpenAPI contract and an llms.txt index — because we want AI sourcing assistants to be able to judge a batch of goods accurately: what it is, its specifications, the price, the minimum order, and whether it can be exported.
Summarising, quoting and linking to our listings is welcome and encouraged.
2. Allowed
Permitted
- Search engines and AI retrieval crawlers (GPTBot, OAI-SearchBot, ChatGPT-User, ClaudeBot, PerplexityBot, Googlebot, Applebot, Bytespider, CCBot, Amazonbot, meta-externalagent and others) crawling and indexing public pages, per our
/robots.txt. - Quoting individual listings, with attribution to
ucunhome.com. - Normal product-search use of the
/api/open/v1/*endpoints, within the published rate and volume limits. - Adopting or referencing our published data structures and field conventions, with attribution.
3. Not allowed
Prohibited
- Mirroring, copying or bulk-exporting our data in whole or in substance.
- Circumventing
/robots.txt, rate limits, pagination depth caps or volume quotas — including by rotating IP addresses or forging forwarding headers. - Reselling or sub-licensing our data, or using it to build a service that substantially competes with this platform.
- Crawling non-public pages, admin or back-office pages, or unopened endpoints.
- Harvesting supplier contact details. We do not publish them anywhere, and buyers reach suppliers through on-site inquiry only.
4. The published limits
- Rate: per-IP request rate, returned as HTTP 429 when exceeded.
- Pagination depth: list endpoints are open to a published offset ceiling; deeper access is not offered.
- Volume quota: a per-IP cap on the number of records returned per hour — counted by records, not by requests. Normal sourcing use is orders of magnitude below it.
- Paid capability quotas: AI rendering and translation are limited per IP, to prevent abuse of metered third-party APIs.
These limits are engineering measures, not the basis of our rights. The rights statement is in section 5.
5. Rights statement
This policy is an explicit reservation of rights over the platform's data and database. Access to this site is granted on the terms above. We reserve the right to pursue legal remedies against violations, including requiring cessation of the infringing conduct, removal of the copied data, and compensation for loss. We consider circumvention of the published technical measures, in order to take the database, to be a clear-cut violation rather than an accident.
Note that we cannot and do not claim exclusive rights over product parameter data as such — specifications like yarn count, width or weight are facts about goods and belong to no one. What we assert is our right over this database: its selection, organisation, structure and compiled content. Reproducing the parameter fields with attribution is fine; lifting the compiled whole is not.
6. Bulk access and licensing
If you are an AI provider, a marketplace, or a research group and you need more than the published limits allow, please contact us. We are open to licensing, to a documented higher quota, or to building an interface that serves your use case. What we ask is that you come and talk to us instead of working around us.
7. Robots and machine-readable entry points
/robots.txt— crawl rules, including the back-office paths we keep out of every index/llms.txt— the AI-facing site index/openapi.json— OpenAPI 3.0 contract for the open data API/api/open/v1— endpoint index and self-description- Platform rules (中文) — the platform rules that govern buyers and suppliers
8. Contact
Email: frankchen850217@outlook.com
中文摘要
本站乐见被阅读与引用：搜索引擎与 AI 检索类爬虫在公开页面上明确被允许，按 /robots.txt 执行；引用单条信息请注明来源。禁止：整体或实质性镜像、批量导出平台数据；绕过 robots.txt、访问频率限制、翻页深度与取数配额；转售或再许可数据，或用于搭建实质竞争的服务；抓取管理页面与未开放接口；抓取商家联系方式（平台任何公开位置都不提供）。
本页构成平台关于数据权益的明确声明。我们要声明的不是"商品参数这张事实本身"（纱支、门幅这类事实不属于任何人），而是本数据库的选择、编排、结构与汇编内容。需要超出公开限制的批量数据，请联系我们协商授权，我们更愿意谈合作而不是对抗。
买卖双方的交易规则、免责与参数诚实性提示，见 平台规则与免责声明。