diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..95b0389
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,42 @@
+{
+    // 使用 IntelliSense 了解相关属性。 
+    // 悬停以查看现有属性的描述。
+    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Python Debugger: FastAPI",
+            "type": "debugpy",
+            "request": "launch",
+            "module": "uvicorn",
+            "args": [
+                "app.main:app",
+                "--reload"
+            ],
+            "jinja": true,
+            "cwd": "${workspaceFolder}",
+            "subProcess": true,
+            "env": {
+                "PYTHONPATH": "${workspaceFolder}"
+            }
+        },
+        {
+            "name": "Python Debugger: FastAPI (no reload)",
+            "type": "debugpy",
+            "request": "launch",
+            "module": "uvicorn",
+            "args": [
+                "app.main:app",
+                "--host",
+                "127.0.0.1",
+                "--port",
+                "8000"
+            ],
+            "jinja": true,
+            "cwd": "${workspaceFolder}",
+            "env": {
+                "PYTHONPATH": "${workspaceFolder}"
+            }
+        }
+    ]
+}
\ No newline at end of file
diff --git a/README.md b/README.md
index 0cb140b..63fba06 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,41 @@ app/
 - POST `/proxy/rotate` 执行轮换（可传 cityhash/num）
 - GET `/proxy/status` 当前状态
 
+#### POST `/proxy/rotate`
+- 请求体（JSON）：
+  - `cityhash`（可选，string）：城市哈希；若不传，将使用环境变量 `EIP_DEFAULT_CITYHASH`。
+  - `num`（可选，int）：拉取设备数量上限；若不传，使用环境变量 `EIP_DEFAULT_NUM`，再不设则默认 10。
+
+- 行为说明：
+  - 根据 `cityhash` 调用设备列表接口（数量为 `num`），从中选择「今天未使用过」的第一个 IP。
+  - 将选中设备的 `edge` 配置到网关规则中，并把该 IP 记录为当天已使用。
+  - 若没有可用且今天未使用的 IP，则返回未变更原因。
+
+- 请求示例：
+```bash
+curl -X POST 'http://localhost:8000/proxy/rotate' \
+  -H 'Content-Type: application/json' \
+  -d '{"cityhash": "310000", "num": 20}'
+```
+
+- 响应示例（变更成功）：
+```json
+{
+  "changed": true,
+  "ip": "1.2.3.4",
+  "edge": "edge-id-xxx",
+  "status": { "...": "gateway_status_payload" }
+}
+```
+
+- 响应示例（无可用 IP）：
+```json
+{
+  "changed": false,
+  "reason": "没有可用且今天未使用的 IP"
+}
+```
+
 ### 备注
 - EIP 详细接口见 `API.md`
 
diff --git a/app/routers/proxy.py b/app/routers/proxy.py
index f9fa391..321b7c3 100644
--- a/app/routers/proxy.py
+++ b/app/routers/proxy.py
@@ -1,6 +1,6 @@
 from typing import Optional
 
-from fastapi import APIRouter
+from fastapi import APIRouter, Body, Query, Form
 from pydantic import BaseModel
 
 from ..rotation_service import rotate as rotate_impl, status as status_impl
@@ -15,8 +15,26 @@ class RotateRequest(BaseModel):
 
 
 @router.post("/rotate")
-def rotate(req: RotateRequest):
-    result = rotate_impl(cityhash=req.cityhash, num=req.num)
+def rotate(
+    # 查询参数
+    cityhash_q: Optional[str] = Query(None, alias="cityhash"),
+    num_q: Optional[int] = Query(None, alias="num"),
+    # 表单参数（multipart/form-data 或 application/x-www-form-urlencoded）
+    cityhash_f: Optional[str] = Form(None),
+    num_f: Optional[int] = Form(None),
+    # JSON 请求体（application/json）
+    req: Optional[RotateRequest] = Body(None),
+):
+    # 优先级：Query > Form > JSON
+    effective_cityhash = (
+        cityhash_q
+        if cityhash_q is not None
+        else (cityhash_f if cityhash_f is not None else (req.cityhash if req else None))
+    )
+    effective_num = (
+        num_q if num_q is not None else (num_f if num_f is not None else (req.num if req else None))
+    )
+    result = rotate_impl(cityhash=effective_cityhash, num=effective_num)
     return result