diff --git a/doc/api.md b/doc/api.md
index 4937272..a5ab9fb 100644
--- a/doc/api.md
+++ b/doc/api.md
@@ -4,7 +4,13 @@
 ## Base URL
 
 ```
-http://localhost:3000
+http://localhost:3000/api
+```
+
+**Default Headers:**
+
+```
+Content-Type: application/json
 ```
 
 ---
@@ -21,11 +27,6 @@ Sorts an array (numeric or alphabetical) and returns the sorted array.
 POST /sort
 ```
 
-**Headers:**
-
-```
-Content-Type: application/json
-```
 
 **Body Example:**
 
@@ -43,16 +44,8 @@ Content-Type: application/json
 }
 ```
 
-### Error Responses
 
-| Status Code | Description                                     |
-| ----------- | ----------------------------------------------- |
-| `400`       | Request body missing or `array` is not an array |
-| `500`       | Unexpected server error                         |
-
----
-
-## 2️⃣ POST `/is-odd`
+## 2️⃣ POST `/isOdd`
 
 Checks if a given number is odd.
 
@@ -61,13 +54,7 @@ Checks if a given number is odd.
 **URL:**
 
 ```
-POST /is-odd
-```
-
-**Headers:**
-
-```
-Content-Type: application/json
+POST /isOdd
 ```
 
 **Body Example:**
@@ -82,30 +69,13 @@ Content-Type: application/json
 
 ```json
 {
-  "number": 7,
-  "isOdd": true
+  "ret": true
 }
 ```
 
-**Example with an even number:**
-
-```json
-{
-  "number": 4,
-  "isOdd": false
-}
-```
-
-### Error Responses
-
-| Status Code | Description                                            |
-| ----------- | ------------------------------------------------------ |
-| `400`       | Request body missing or `number` is not a valid number |
-| `500`       | Unexpected server error                                |
-
 ---
 
-## 3️⃣ POST `/is-even`
+## 3️⃣ POST `/isEven`
 
 Checks if a given number is even.
 
@@ -114,13 +84,7 @@ Checks if a given number is even.
 **URL:**
 
 ```
-POST /is-even
-```
-
-**Headers:**
-
-```
-Content-Type: application/json
+POST /isEven
 ```
 
 **Body Example:**
@@ -135,29 +99,10 @@ Content-Type: application/json
 
 ```json
 {
-  "number": 4,
-  "isEven": true
+  "ret": true
 }
 ```
 
-**Example with an odd number:**
-
-```json
-{
-  "number": 7,
-  "isEven": false
-}
-```
-
-### Error Responses
-
-| Status Code | Description                                            |
-| ----------- | ------------------------------------------------------ |
-| `400`       | Request body missing or `number` is not a valid number |
-| `500`       | Unexpected server error                                |
-
----
-
 ## 📌 Example Usage with `curl`
 
 ### Sort an array (Linux/macOS)
diff --git a/src/routes/api/isEven.js b/src/routes/api/isEven.js
index 51e6a8e..a654c39 100644
--- a/src/routes/api/isEven.js
+++ b/src/routes/api/isEven.js
@@ -3,9 +3,9 @@ const isEven = require('is-even');
 const router = express.Router();
 
 router.post('/', (req, res) => {
-    const { num } = req.body;
+    const { number } = req.body;
 
-    res.json({ ret: isEven(num) });
+    res.json({ ret: isEven(number) });
 });
 
 module.exports = router;
\ No newline at end of file
diff --git a/src/routes/api/isOdd.js b/src/routes/api/isOdd.js
index 5281af8..09e88b8 100644
--- a/src/routes/api/isOdd.js
+++ b/src/routes/api/isOdd.js
@@ -3,9 +3,9 @@ const isOdd = require('is-odd');
 const router = express.Router();
 
 router.post('/', (req, res) => {
-    const { num } = req.body;
+    const { number } = req.body;
 
-    res.json({ ret: isOdd(num) });
+    res.json({ ret: isOdd(number) });
 });
 
-module.exports = router;
\ No newline at end of file
+module.exports = router;