diff --git a/espec.yml b/espec.yml
deleted file mode 100644
index 90f96f5..0000000
--- a/espec.yml
+++ /dev/null
@@ -1,27 +0,0 @@
-openapi: 3.0.0
-info:
-  title: Python to .Net
-  description: Still whitout description.
-  version: 0.25.1
-servers:
-- url: http://www.skycoin.net
-  description: Main Skycoin server
-- url: http://staging.node.skycoin.net
-  description: Internal staging server for developer.
-components:
-  securitySchemes:
-    CsrfTokenAuth:        # arbitrary name for the security scheme
-      type: apiKey
-      in: header       # can be "header", "query" or "cookie"
-      name: X-CSRF-TOKEN  # name of the header, query parameter or cookie
-  schemas:
-    genericError:
-      description: This is a generic error that should be default response
-      type: object
-      properties:
-        code:
-          type: integer
-          format: int64
-        message:
-          type: string
-paths:
\ No newline at end of file
diff --git a/spec.yml b/spec.yml
new file mode 100644
index 0000000..8499d61
--- /dev/null
+++ b/spec.yml
@@ -0,0 +1,190 @@
+openapi: 3.0.0
+info:
+  title: Python to .Net
+  description: Still whitout description.
+  version: 0.25.1
+servers:
+- url: http://www.skycoin.net
+  description: Main Skycoin server
+- url: http://staging.node.skycoin.net
+  description: Internal staging server for developer.
+components:
+  securitySchemes:
+    CsrfTokenAuth:        # arbitrary name for the security scheme
+      type: apiKey
+      in: header       # can be "header", "query" or "cookie"
+      name: X-CSRF-TOKEN  # name of the header, query parameter or cookie
+  schemas:
+    genericError:
+      description: This is a generic error that should be default response
+      type: object
+      properties:
+        code:
+          type: integer
+          format: int64
+        message:
+          type: string
+paths:
+  /api/transactions/history/from/{address}:
+    get:
+      summary: Get history from address.
+      description: Should return completed transactions that transfer fund from the `address` and that were broadcasted after the transaction with the `hash` equal to the `afterHash`.<br>
+                   If `afterHash` is empty, transactions should be read from the beginning. <br>
+                    Should include all transactions broadcasted even if not going through `/transaction/broadcast/*` API endpoints. <br>
+                    If there are no transactions to return, empty array should be returned. Amount of the returned transactions should not exceed `take` .
+      security: 
+      - CsrfTokenAuth: []
+
+      parameters: 
+      - name: address
+        in: path
+        description: Address for find blockchain explorer URLs
+        required: true
+        schema:
+          type: string
+      - name: take
+        in: query
+        required: true
+        schema:
+          type: integer
+      - name: afterHash
+        in: query
+        required: false
+        schema:
+          type: string
+
+      responses:
+        '200':
+          description: Operation ID. The transaction Id.
+          content:
+            application/json:
+              schema:
+                type: array
+                items: 
+                  properties:
+                    operationId:
+                      type: string
+                      description: Can be empty. <br>
+                                  Should be not empty for transactions that broadcasted using this API.
+                    timestamp:
+                      type: string
+                      format: date-time
+                      description: 'Transaction moment as ISO 8601 in UTC'
+  
+                    fromAddress:
+                      type: string
+                      description: Source address.
+                      
+                    toAddress:
+                      type: string
+                      description: Destination address.
+  
+                    assetId:
+                      type: string
+                      description: Asset ID e.g. SKY
+                      
+                    amount:
+                      type: string
+                      description: 'Amount without fee. Is integer as string, aligned to the asset accuracy. Actual value can be calculated as `x = sourceAmount * (10 ^ asset.Accuracy)`'
+                      
+                    hash:
+                      type: string
+                      description: Transaction hash as base64 string
+                      
+        default:
+          $ref : '#/components/schemas/genericError'
+                      
+  /api/transactions/history/from/{address}/observation:
+    delete:
+      summary: Stop observation from address
+      
+      description: Should stop observation of the transactions that transfer fund from the address . Should affect result of the [GET] /api/transactions/history/from/{address}.
+      
+      parameters: 
+      - name: address
+        in: path
+        description: Address from stop being observed
+        required: true
+        schema:
+          type: string
+          
+      responses:
+        '200':  
+          description: "Ok"
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  signedTransaction:
+                    type: string
+    
+        default:
+          $ref : '#/components/schemas/genericError'
+                  
+  /api/transactions/history/to/{address}/observation:
+    delete:
+      summary: Stop observation to address
+      
+      description: Should stop observation of the transactions that transfer fund to the address . Should affect result of the '[GET] /api/transactions/history/to/{address}' .
+      
+      parameters: 
+      - name: address
+        in: path
+        description: Address to stop being observed
+        required: true
+        schema:
+          type: string
+          
+      responses:
+        '200':  
+          description: "Ok"
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  signedTransaction:
+                    type: string
+    
+        default:
+          $ref : '#/components/schemas/genericError'
+
+  /api/addresses/{address}/validity:
+    get:
+      summary: Valid address API endpoint.
+      description: Should check and return address validity.<br>
+                  Should check and return wallet address validity
+      security: 
+      - CsrfTokenAuth: []
+
+      parameters: 
+      - name: address
+        in: path
+        description: Address for find blockchain explorer URLs
+        required: true
+        schema:
+          type: string
+
+      responses:
+        '200':
+          description: Validation. The Validation value.
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  isValid:
+                    type: boolean
+                    description: Flag, which indicates that the address is valid
+                   
+        default:
+          $ref : '#/components/schemas/genericError'
+          
+# To remember :
+#  Every post method should use security schema.
+#  Feel free to use and reuse components
+#  I think, at some point, someone should use oneOf and anyOf, pls take a look
+
+        
+