diff --git a/API.md b/API.md
index 8e79554..c1d7ac3 100644
--- a/API.md
+++ b/API.md
@@ -4,6 +4,25 @@ HOST: https://mainnet.blockchainos.org
 # Sebak Client API
 SEBAK, the next BOScoin network with ISAAC consensus protocol. 
 
+## SEBAK API supports [CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS).
+- Request only accepted methods
+    - [**GET**](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/GET)
+    - [**HEAD**](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/HEAD)
+    - [**POST**](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST)
+- Except automatic set up by user-agent ,request Header accepts only;
+    - [**Accept**](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept)
+    - [**Accept-Language**](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Language)
+    - [**Content-Language**](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Language)
+    - [**Content-type**](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Type): you should check detail information below about content-type.
+    - [**DPR**](https://httpwg.org/http-extensions/client-hints.html#dpr)
+    - [**Save-data**](https://httpwg.org/http-extensions/client-hints.html#save-data)
+    - [**Viewport-width**](https://httpwg.org/http-extensions/client-hints.html#viewport-width)
+    - [**Width**](https://httpwg.org/http-extensions/client-hints.html#width)
+- The only allowed values for the Content-Type header are:
+    - ```application/x-www-form-urlencoded```
+    - ```multipart/form-data```
+    - ```text/plain```
+
 <!-- partial(API_v1/accounts.md) -->
 <!-- partial(API_v1/models.md) -->
 <!-- partial(API_v1/transactions.md) -->
diff --git a/API_v1/models.md b/API_v1/models.md
index 6b249c4..d00f0ab 100644
--- a/API_v1/models.md
+++ b/API_v1/models.md
@@ -33,6 +33,13 @@
         + fee: 10000
         + hash: `7nLuyg8radTExzBM2WhG37AwohBwEySBw4vj2xdtdjAs`
         + operation_count: 1
+        + operations:
+            + (array)
+                + H
+                    + type : `payment` - operation type. ex. payment, create-account
+                + B
+                    + target : `GCIKBR6QXYF6VLLTXC7EHKDGAPAOLSRALZTWTLZ2SANBYWMWT6AURQGG`
+                    + amount : `100000` - amount in GON
         + sequence_id: 0
         + source: `GDIRF4UWPACXPPI4GW7CMTACTCNDIKJEHZK44RITZB4TD3YUM6CCVNGJ`
 + _links
@@ -64,16 +71,16 @@
     + source: GDIRF4UWPACXPPI4GW7CMTACTCNDIKJEHZK44RITZB4TD3YUM6CCVNGJ - Source account
     + fee: 10000 - The fee paid by the source account for this transaction. Minimum is 10000 GON
     + sequence_id: 0 - The last sequence number of the source account
-    + operations (array)
+    + operations:(array)
         + (object):
-            + H 
+            + H
                 + type: `payment` - operation type. ex. payment, create-account
             + B
                 + target: GDTEPFWEITKFHSUO44NQABY2XHRBBH2UBVGJ2ZJPDREIOL2F6RAEBJE4 - The funded account's public key
                 + amount: 1000000000000- amount in GON
 
-### Transaction Post 
-+ _links  
+### Transaction Post
++ _links
     + history
         + href: `/api/v1/transactions/7mRUj4cnUPaTrpByojPsT3xoRRdwG6Q9z2eLyCMapQm6/history`
     + self
@@ -83,17 +90,17 @@
     + source: GDIRF4UWPACXPPI4GW7CMTACTCNDIKJEHZK44RITZB4TD3YUM6CCVNGJ - Source account
     + fee: `10000` - The fee paid by the source account for this transaction. Minimum is 10000 GON
     + sequence_id: 0 - The last sequence number of the source account
-    + operations (array)
+    + operations:(array)
         + (object):
             + H
-                + type:create-account - operation type. ex. payment, create-account
+                + type: `create-account` - operation type. ex. payment, create-account
             + B
                 + target: GDTEPFWEITKFHSUO44NQABY2XHRBBH2UBVGJ2ZJPDREIOL2F6RAEBJE4 - The funded account's public key
                 + amount: 1000000000000- amount in GON
 + status: `submitted` - three categories of status; submitted, confirmed, rejected
 
 ### Transaction
-+ _links 
++ _links
     + account
         + href: `/api/v1/accounts/GDIRF4UWPACXPPI4GW7CMTACTCNDIKJEHZK44RITZB4TD3YUM6CCVNGJ`
     + operations
@@ -106,6 +113,13 @@
 + fee: `10000` (string) - The fee paid by the source account
 + hash: `ghf6msRhE4jRf5DPib9UHD1msadvmZs9o53V9FQTb11` (string,required) - Hash of transaction. //TODO: link for the details
 + operation_count: 1 (number) - The number of operations in this transaction.
++ operations:(array)
+    + (object):
+        + H
+            + type : `payment` - operation type. ex. payment, create-account
+        + B
+            + target : GDIRF4UWPACXPPI4GW7CMTACTCNDIKJEHZK44RITZB4TD3YUM6CCVNGJ`
+            + amount : 200
 + sequence_id: 0 (number) - the Sequence number of the source account.
 + source: `GDIRF4UWPACXPPI4GW7CMTACTCNDIKJEHZK44RITZB4TD3YUM6CCVNGJ` (string) -
         
@@ -122,13 +136,14 @@
         + body
             + target: GDEPYGGALPJ5HENXCNOQJPPDOQMA2YAXPERZ4XEAKVFFJJEVP4ZBK6QI - The funded account's public key
             + amount: `1000000000000` - amount in GON
-        
         + confirmed: `2018-11-27T07:49:05.971799020Z`
         + hash: F6SEv2QhgwZwxUARbRacxyZaufzcTxdYDXJBpvf7pNAj-7nLuyg8radTExzBM2WhG37AwohBwEySBw4vj2xdtdjAs - Hash of operation
+        + index: 0
         + proposed_time: `2018-11-27T07:49:05.942922134Z`
         + source: GDIRF4UWPACXPPI4GW7CMTACTCNDIKJEHZK44RITZB4TD3YUM6CCVNGJ - Source account
+        + target: GDEPYGGALPJ5HENXCNOQJPPDOQMA2YAXPERZ4XEAKVFFJJEVP4ZBK6QI - The funded account's public key
         + tx_hash: 7nLuyg8radTExzBM2WhG37AwohBwEySBw4vj2xdtdjAs - Hash of transaction
-        + type: create-account  - operation type. ex. payment, create-account
+        + type: `create-account`  - operation type. ex. payment, create-account
     
     + _links
         + next
@@ -171,7 +186,7 @@
         + href: `/api/v1/blocks/AcFpZMr6EhxBuCw3xADUzepa395wmh3c5fo2cyxYCi1q`
 + confirmed: 2018-11-18T18:44:47.900933000+09:00
 + hash: `AcFpZMr6EhxBuCw3xADUzepa395wmh3c5fo2cyxYCi1q`
-+ height: 3 
++ height: 3
 + prev_block_hash: `J8TQCCtsiLcRZpYtVN3ozCFByd24fjXe2BgodLkeXN7S`,
 + proposed_time: `2018-04-17T5:07:31.000000000Z`
 + proposer: `GDIRF4UWPACXPPI4GW7CMTACTCNDIKJEHZK44RITZB4TD3YUM6CCVNGJ`
@@ -190,5 +205,5 @@
 
 ### Problem NotFound
 + status: 400 (number)
-+ title: `does not exists` 
++ title: `does not exists`
 + type: `https://boscoin.io/sebak/error/128`
diff --git a/API_v1/transactions.md b/API_v1/transactions.md
index 8f3e764..d8fd021 100644
--- a/API_v1/transactions.md
+++ b/API_v1/transactions.md
@@ -5,7 +5,7 @@ Transactions API
 ## Transactions [/api/v1/transactions]
 
 
-### Payment transaction  [POST] 
+### Payment transaction  [POST]
 
 + You can refer [this link to make transaction through sebakpy-util.](https://bosnet.github.io/how-to-make-transaction-post/)
 + Data Body consist of 3 parts, ; T, H, B
diff --git a/sebak/command.md b/sebak/command.md
index 40999cc..9816348 100644
--- a/sebak/command.md
+++ b/sebak/command.md
@@ -1,4 +1,4 @@
-To install `sebak` command, please check the [installation guide](installation.md).
+# SEBAK command
 
 # Options
 ```sh
@@ -113,11 +113,8 @@ Flags:
       --log string                          set log file
       --log-format string                   log format, {terminal, json} (default "terminal")
       --log-level string                    log level, {crit, error, warn, info, debug} (default "info")
-      --log-rotate-max-count string         max count of rotated logs (default "0")
-      --log-rotate-max-days string          max days of rotated logs (default "0")
-      --log-rotate-max-size string          max size of rotate log (default "100")
-      --log-rotate-uncompress               disable compression of rotate log
       --network-id string                   network id
+      --ntp string                          ntp server for time sync (default "time.bora.net")
       --operations-in-ballot-limit string   operations limit in a ballot (default "10000")
       --operations-limit string             operations limit in a transaction (default "1000")
       --publish string                      endpoint url for other nodes
@@ -132,6 +129,7 @@ Flags:
       --sync-pool-size string               sync pool size (default "300")
       --sync-retry-interval string          sync retry interval (default "10s")
       --threshold string                    threshold (default "67")
+      --time-sync-command string            command for syncing local time
       --timeout-accept string               timeout of the accept state (default "2s")
       --timeout-allconfirm string           timeout of the allconfirm state (default "30s")
       --timeout-init string                 timeout of the init state (default "2s")
@@ -192,10 +190,10 @@ Usage:
 
 Flags:
       --dry-run             Print the transaction instead of sending it
-      --endpoint string     endpoint to send the transaction to (https / memory address)
-  -h, --help                help for unfreezeRequest
-      --network-id string   network id
-      --verbose             Print extra data (transaction sent)
+      —endpoint string     endpoint to send the transaction to (https / memory address)
+  -h, —help                help for unfreezeRequest
+      —network-id string   network id
+      —verbose             Print extra data (transaction sent)
 ```
 
 ## `sebak version`
@@ -203,5 +201,5 @@ Flags:
 This command for print current version.
 ```sh
 $ sebak version
-0.1.X
-```
+version= git= build=
+```
\ No newline at end of file