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+## 1-1. 특정 지역에 가게 추가하기 API
+
+`POST /api/regions/{regionId}/stores`  
+`Content-Type: application/json`
+
+**Request Body**
+```json
+{
+  "name": "식당",
+  "address": "서울시 강남구 ",
+  "category": "한식",
+  "description": "설명",
+  "image_url": "https://..."
+}
+```
+
+**Response**
+```json
+{
+  "store_id": 1,
+  "name": "식당",
+  "region_id": 3,
+  "created_at": "2026-04-15T10:00:00"
+}
+```
+
+---
+
+## 1-2. 가게에 리뷰 추가하기 API
+
+
+`POST /api/stores/{storeId}/reviews`  
+`Authorization: Bearer {token}`  
+`Content-Type: application/json`
+
+**Request Body**
+```json
+{
+  "user_mission_id": 101,
+  "rating": 5,
+  "content": "맛있어요",
+  "image_url": "https://..."
+}
+```
+
+**Response**
+```json
+{
+  "review_id": 42,
+  "store_id": 5,
+  "rating": 5,
+  "created_at": "2026-04-15T10:00:00"
+}
+```
+
+---
+
+## 1-3. 가게에 미션 추가하기 API
+
+`POST /api/stores/{storeId}/missions`  
+`Content-Type: application/json`
+
+**Request Body**
+```json
+{
+  "region_id": 3,
+  "title": "미션 제목",
+  "description": "미션 설명"
+}
+```
+
+**Response**
+```json
+{
+  "mission_id": 10,
+  "store_id": 5,
+  "name": "미션 제목",
+  "reward_points": 500
+}
+```
+
+---
+
+## 1-4. 가게의 미션을 도전 중인 미션에 추가(미션 도전하기) API
+
+`POST /api/missions/{missionId}/challenge`  
+`Authorization: Bearer {token}`
+
+**Response**
+```json
+{
+  "user_mission_id": 55,
+  "mission_id": 10,
+  "user_id": 1,
+  "status": "IN_PROGRESS",
+  "started_at": "2026-04-15T10:00:00"
+}
+```
+
+---
+
+## 2. Controller → Service → Repository → DB 요청 흐름
+
+1. 사용자가 `POST /api/v1/users/signup` 요청을 보냄
+2. request body를 받아서 service 함수 호출
+3. 값이 유효한지 db 조회
+4. 테이블에 삽입
+5. 저장된 정보를 반환
+
+---
+
+## 3. 회원가입 API 비밀번호 해싱 과정
+
+1. 사용자가 password 평문을 Request Body로 전송
+2. Service 레이어에서 bcrypt로 해싱
+3. 해시된 값을 DB에 저장
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