diff --git a/AGENTS.md b/AGENTS.md
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+++ b/AGENTS.md
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+# AGENTS.md — uapi-browser-sdk
+
+This file tells AI coding agents how to use the **official browser /
+vanilla-JS SDK** for the [uapis.cn](https://uapis.cn) public API platform.
+
+## What this package is
+
+Browser-first, dependency-free TypeScript client for UAPI. Built on the
+native `fetch` API, ships an ESM bundle, and works equally well from a
+`<script type="module">` tag, a Vite/Next/Remix project, or a Cloudflare
+Worker. Generated from the live OpenAPI 3.1 spec at
+<https://uapis.cn/openapi.json>.
+
+## Install
+
+```bash
+npm i uapi-browser-sdk
+# or with pnpm / yarn
+```
+
+CDN:
+
+```html
+<script type="module">
+  import { UapiClient } from "https://esm.sh/uapi-browser-sdk";
+  const client = new UapiClient("https://uapis.cn");
+  console.log(await client.misc.getMiscWeather({ city: "北京" }));
+</script>
+```
+
+## Quick start
+
+```ts
+import { UapiClient } from "uapi-browser-sdk";
+
+const client = new UapiClient("https://uapis.cn");
+const weather = await client.misc.getMiscWeather({ city: "北京" });
+console.log(weather);
+```
+
+The client is grouped by tag (`misc`, `network`, `text`, `image`, `social`,
+`translate`, `search`, …) and each method name matches the underlying
+`operationId`, camelCased.
+
+## Authentication
+
+Free-tier endpoints work with no key. Paid endpoints take a key:
+
+```ts
+const client = new UapiClient("https://uapis.cn", { apiKey: "sk_…" });
+```
+
+> **Warning.** Putting an API key inside a public web page exposes it to
+> anyone who reads the JS bundle. For browser-side calls to paid
+> endpoints, prefer a thin server-side proxy that injects the key.
+
+## Errors
+
+Methods throw a typed `UapiApiError` on non-2xx responses. The error
+carries `code`, `error`, and `requestId` fields. Surface `error` verbatim.
+
+## Rate limits
+
+Headers `X-RateLimit-Limit`, `X-RateLimit-Remaining`, `X-RateLimit-Reset`,
+`Retry-After` are exposed via `error.response.headers` (and on success
+responses via the optional `withResponse` overload). Honor them.
+
+## Related repos
+
+- Server-side TS SDK: <https://github.com/AxT-Team/uapi-sdk-typescript>.
+- MCP server: <https://github.com/AxT-Team/uapi-mcp>.
+- Skills bundle: <https://github.com/AxT-Team/uapi-agent-skills>.
+- Other languages: `uapi-sdk-python`, `uapi-sdk-go`, `uapi-sdk-rust`,
+  `uapi-sdk-java`, `uapi-sdk-csharp`, `uapi-sdk-cpp`, `uapi-sdk-php`.
diff --git a/LICENSE b/LICENSE
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+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 AxT-Team / UAPI
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/package.json b/package.json
index c8a1776..02432ee 100644
--- a/package.json
+++ b/package.json
@@ -14,8 +14,33 @@
     "type": "git",
     "url": "https://github.com/AxT-Team/uapi-browser-sdk"
   },
-  "scripts": { "build": "tsc -p tsconfig.json" },
+  "scripts": {
+    "build": "tsc -p tsconfig.json"
+  },
   "devDependencies": {
     "typescript": "^5.4.0"
-  }
+  },
+  "description": "Official browser / vanilla-JS SDK for UAPI / uapis.cn — dependency-free `fetch`-based wrapper around 100+ free public-API endpoints. Works in browsers, Cloudflare Workers, and any modern JS runtime.",
+  "homepage": "https://uapis.cn/docs/sdk/browser",
+  "bugs": {
+    "url": "https://github.com/AxT-Team/uapi-browser-sdk/issues"
+  },
+  "author": "UAPI <dev@uapis.cn>",
+  "license": "MIT",
+  "keywords": [
+    "uapi",
+    "uapis",
+    "uapis.cn",
+    "sdk",
+    "browser",
+    "vanilla-js",
+    "typescript",
+    "fetch",
+    "public-api",
+    "free-api",
+    "openapi",
+    "client",
+    "agent",
+    "llm"
+  ]
 }