美国联邦准备度
唯一实体标识（UEI）是 SAM.gov 分配给每个已注册实体的 12 位代码。它于 2022 年取代了 DUNS 编号。这里讲清它是什么、如何查到你自己的，以及如何免费查询他人的。
如果你刚接触联邦采购，UEI 就是每个系统都会索取的标识。如果你在审核合作方或竞争对手，它就是你确认对方是否为真实、有效的已注册实体的依据。
Claude 
ChatGPT 
Perplexity 
Grok Set up Sell to State for me: government tenders and contract awards from official sources in 73 countries, as MCP tools. Agent docs: https://docs.selltostate.com/llms.txt
1. Sign me in yourself. Try this first: you need me only for one approval click.
- If you can send HTTP requests: POST https://app.selltostate.com/api/v1/agent/signup with JSON {"client_name": "<your app name>"}. Show me verification_uri_complete from the reply as a link. I open it, sign up free with Google or email, and approve the code. Every "interval" seconds, POST token_endpoint with {"device_code": "<device_code>"} until the reply has access_token. Send access_token in the x-api-key header to the MCP server https://app.selltostate.com/api/mcp.
- If you cannot send HTTP requests: tell me to add the MCP server https://app.selltostate.com/api/mcp in this app. Its sign-in page also creates the free account. Claude: Customize > Connectors > Add custom connector. ChatGPT: chatgpt.com/plugins > + > Add custom MCP server, choose OAuth. Claude Code: claude mcp add --transport http selltostate https://app.selltostate.com/api/mcp, then /mcp > Authenticate.
2. The tools are free to connect. A free account gets plan_search 3 times a day and search for 2 different searches a day: titles, buyers, status and dates. Amounts, winners and notice links need a plan. Call whoami to see my plan.
3. Ask me what my company sells and in which countries. Call plan_search with my answer, then search with its scope, q and filters. Show me the 10 best open tenders with the title, the buyer and the dates. Then give me app_url: it shows every row, and I can save the search there for email alerts. | 它是什么 | 分配给 SAM.gov 中实体的 12 位字母数字标识 |
| 由谁签发 | 美国总务管理局（General Services Administration），在 SAM.gov 内部 |
| 费用 | 免费 —— 获取或查询 UEI 均不收费 |
| 取代了 | DUNS 编号，已被联邦政府于 2022 年 4 月停用 |
| 有效期 | UEI 本身不会过期（但围绕它的 SAM 注册必须每年续期） |
| 在哪里查询 | sam.gov 上的公开实体检索 |
The lookup is public and free on the official site. You only need an account to view or edit your own registration.
打开 sam.gov 上的公开检索。查询一个已将其记录设为公开的实体，无需账户。
输入法定企业名称、已有的 UEI 或 CAGE 代码。SAM.gov 会返回匹配的已注册实体及其 UEI、CAGE 代码、状态和注册日期。
查看注册状态。只有注册处于有效状态的实体，才具备获得大多数新联邦合同授予的资格 —— 一个实体可能持有有效的 UEI，但注册已失效。
Look up entities at the official site, sam.gov. Sell to State is not affiliated with SAM.gov, GSA, or any U.S. government agency.
UEI 告诉你某个实体真实存在且已注册。它不会告诉你对方买什么、卖给谁，或此刻哪些合同正开放。那属于发现 —— 是另一回事。
Sell to State 正是完成这件事的地方。用日常英语检索政府招标、剖析任意采购机构或供应商、查看中标历史，并接收新机会的每日邮件提醒 —— 覆盖联邦、州与地方市场以及 73 个国家。
继续深入
唯一实体标识（UEI）是美国总务管理局分配给 SAM.gov 中实体的 12 位字母数字标识符。它是联邦系统在各类合同与财政援助中唯一指代某家企业的方式。它于 2022 年 4 月取代了 DUNS 编号。
登录 SAM.gov 并打开你的实体记录 —— 你的 UEI 会显示在你的注册信息上。若要查询其他实体，请使用 sam.gov 上的公开实体检索，按法定企业名称、UEI 或 CAGE 代码检索。
不是。UEI 是联邦政府自有的标识符，在 SAM.gov 内部分配，并于 2022 年 4 月取代了第三方的 DUNS 编号。如果你有引用 DUNS 编号的旧记录，就联邦用途而言，UEI 是它的继任者。
不是。UEI 是来自 SAM.gov 的 12 位标识符；CAGE 代码是来自国防后勤局的另一个 5 位代码。完整的 SAM 注册会同时产生这两者，实体记录会将它们并列显示。
不需要。在 SAM.gov 上获取 UEI 和查询 UEI 都是免费的。政府对二者均不收费，你也无需借助第三方服务来获取 UEI —— 它会在 SAM.gov 实体验证过程中自动生成。
为了核实合作方、分包商或竞争对手是否为真实的已注册联邦实体，为了在组队前确认其注册处于有效状态，或为了交叉比对中标记录。Sell to State 与此互补：一旦你核实了某个实体，就用它来研究该实体销售的对象机构以及它中标的合同。
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Claude ChatGPT Perplexity Grok 
Google
Microsoft
Set up Sell to State for me: government tenders and contract awards from official sources in 73 countries, as MCP tools. Agent docs: https://docs.selltostate.com/llms.txt
1. Sign me in yourself. Try this first: you need me only for one approval click.
- If you can send HTTP requests: POST https://app.selltostate.com/api/v1/agent/signup with JSON {"client_name": "<your app name>"}. Show me verification_uri_complete from the reply as a link. I open it, sign up free with Google or email, and approve the code. Every "interval" seconds, POST token_endpoint with {"device_code": "<device_code>"} until the reply has access_token. Send access_token in the x-api-key header to the MCP server https://app.selltostate.com/api/mcp.
- If you cannot send HTTP requests: tell me to add the MCP server https://app.selltostate.com/api/mcp in this app. Its sign-in page also creates the free account. Claude: Customize > Connectors > Add custom connector. ChatGPT: chatgpt.com/plugins > + > Add custom MCP server, choose OAuth. Claude Code: claude mcp add --transport http selltostate https://app.selltostate.com/api/mcp, then /mcp > Authenticate.
2. The tools are free to connect. A free account gets plan_search 3 times a day and search for 2 different searches a day: titles, buyers, status and dates. Amounts, winners and notice links need a plan. Call whoami to see my plan.
3. Ask me what my company sells and in which countries. Call plan_search with my answer, then search with its scope, q and filters. Show me the 10 best open tenders with the title, the buyer and the dates. Then give me app_url: it shows every row, and I can save the search there for email alerts.