diff --git a/.gitignore b/.gitignore
index 600d2d3..fb1717b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,5 @@
-.vscode
\ No newline at end of file
+.vscode
+# Cached python code
+__pycache__
+# Cached test code
+.pytest_cache
\ No newline at end of file
diff --git a/__init__.py b/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/akauntingpy/__init__.py b/akauntingpy/__init__.py
index ca64440..fbff91d 100644
--- a/akauntingpy/__init__.py
+++ b/akauntingpy/__init__.py
@@ -1,2 +1,2 @@
-from akauntingpy.api import WHMCS
+from akauntingpy.api import Client
 from akauntingpy.exceptions import *
\ No newline at end of file
diff --git a/akauntingpy/api.py b/akauntingpy/api.py
index e69de29..3c24b32 100644
--- a/akauntingpy/api.py
+++ b/akauntingpy/api.py
@@ -0,0 +1,117 @@
+import requests
+import json
+from requests.auth import HTTPBasicAuth
+from akauntingpy import exceptions
+
+def MergeDict(dict1, dict2):
+    dict2.update(dict1)
+    return dict2
+
+def RemoveFromString(items, string):
+    for item in items:
+        string = string.replace(item, '')
+    return string
+class Client(object):
+    """
+    Akaunting interface.
+    """
+    def __init__(
+            self,
+            url,
+            username,
+            password,
+            company_id):
+        """
+        Create a new instance.
+        Args:
+            url (str): The URL to the Akaunting api.
+            username (str): The username of the Akaunting credentials.
+            password (str): The password of the Akaunting credentials.
+        """
+        self.url = url
+        self.authentication = HTTPBasicAuth(username, password)
+        self.headers = {
+            'User-Agent': 'AkauntingPy 1.0',
+        }
+        self.company_id = company_id
+        self.default_params = {'company_id': company_id}
+        
+    def call(self, method="get", endpoint=None, 
+             **params) -> dict():
+        response = None
+        
+        if params is None:
+            response = requests.request(method=method,
+                            url=self.url + "/" + endpoint,
+                            headers=self.headers,
+                            auth=self.authentication,
+                            params=self.default_params)
+        else:
+            response = requests.request(method=method,
+                          url=self.url + "/" + endpoint,
+                          headers=self.headers,
+                          auth=self.authentication,
+                          params=MergeDict(self.default_params, params)
+            )
+            
+        print(response)
+        response_ = response.json()
+        print(response_)
+        # try:
+        #     result = response_['status']
+        # except KeyError:
+        #     result = response_['status_code']
+        if response.status_code == 401:
+            raise exceptions.MissingPermission(response_['message'])
+        elif response.status_code == 422:
+            errors = []
+            for key in response_['errors']:
+                errors.append(RemoveFromString(["<strong>","</strong>"],
+                                               response_['errors'][key][0]) + " (" + key + ")")
+            raise exceptions.InvalidData(response_['message'] +
+                                         "\n" +
+                                         "\n".join(errors))
+        elif response.status_code != 200 and response.status_code != 201:
+            raise exceptions.Error(response_['message'])
+        return response_
+    
+    def ping(self):
+        data = self.call(endpoint="ping")
+        return data
+    
+    def get_accounts(self, params=None):
+        data = self.call(endpoint="accounts", params=params)
+        
+        return data['data']
+    
+    def create_transaction(self,
+                       type='income', # Payment method type
+                       account_id=None, # Account ID to assign
+                       category_id=None, # Category ID to assign
+                       contact_id=None, # Contact ID/Client to assign
+                       paid_at=None, # Date of expense/transfer or income
+                       reference=None, # Reference for the payment
+                       payment_method=None, # Payment method
+                       currency_code=None, # Currency code
+                       currency_rate=None, # Currency rate
+                       amount=None, # Amount received/paid
+                       **params # Any additional parameters
+                       ):
+        
+        
+        data = self.call(endpoint="transactions", 
+                         method="POST", 
+                         search="type:" + type,
+                         type=type,
+                         account_id=account_id,
+                         category_id=category_id,
+                         paid_at=paid_at,
+                         contact_id=contact_id,
+                         payment_method=payment_method,
+                         reference=reference,
+                         currency_code=currency_code,
+                         currency_rate=currency_rate,
+                         amount=amount,
+                         **params
+                         )
+        return data
\ No newline at end of file
diff --git a/akauntingpy/exceptions.py b/akauntingpy/exceptions.py
index e69de29..e51926a 100644
--- a/akauntingpy/exceptions.py
+++ b/akauntingpy/exceptions.py
@@ -0,0 +1,20 @@
+class Error(Exception):
+    """
+    An unspecified error.
+
+    """
+
+
+class MissingPermission(Error):
+    """
+    Missing permission when calling the API.
+
+    """
+    
+class InvalidData(Error):
+    """
+    Missing Data required for request
+
+    Args:
+        Error (_type_): _description_
+    """
diff --git a/data/CreateTransactionIncomeFailed.json b/data/CreateTransactionIncomeFailed.json
new file mode 100644
index 0000000..c59bfd6
--- /dev/null
+++ b/data/CreateTransactionIncomeFailed.json
@@ -0,0 +1,140 @@
+{
+    "message":"The given data was invalid.",
+    "errors":{
+       "type":[
+          "The type field is <strong>required</strong>."
+       ],
+       "account_id":[
+          "The account id field is <strong>required</strong>."
+       ],
+       "paid_at":[
+          "The paid at field is <strong>required</strong>."
+       ],
+       "amount":[
+          "The amount field is <strong>required</strong>."
+       ],
+       "currency_code":[
+          "The currency code field is <strong>required</strong>."
+       ],
+       "currency_rate":[
+          "The currency rate field is <strong>required</strong>."
+       ],
+       "category_id":[
+          "The category id field is <strong>required</strong>."
+       ],
+       "payment_method":[
+          "The payment method field is <strong>required</strong>."
+       ]
+    },
+    "status_code":422,
+    "debug":{
+       "line":138,
+       "file":"/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/FormRequest.php",
+       "class":"Illuminate\\Validation\\ValidationException",
+       "trace":[
+          "#0 /var/www/html/vendor/laravel/framework/src/Illuminate/Validation/ValidatesWhenResolvedTrait.php(26): Illuminate\\Foundation\\Http\\FormRequest->failedValidation(Object(Illuminate\\Validation\\Validator))",
+          "#1 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Providers/FormRequestServiceProvider.php(30): Illuminate\\Foundation\\Http\\FormRequest->validateResolved()",
+          "#2 /var/www/html/vendor/laravel/framework/src/Illuminate/Container/Container.php(1265): Illuminate\\Foundation\\Providers\\FormRequestServiceProvider->Illuminate\\Foundation\\Providers\\{closure}(Object(App\\Http\\Requests\\Banking\\Transaction), Object(Illuminate\\Foundation\\Application))",
+          "#3 /var/www/html/vendor/laravel/framework/src/Illuminate/Container/Container.php(1230): Illuminate\\Container\\Container->fireCallbackArray(Object(App\\Http\\Requests\\Banking\\Transaction), Array)",
+          "#4 /var/www/html/vendor/laravel/framework/src/Illuminate/Container/Container.php(1215): Illuminate\\Container\\Container->fireAfterResolvingCallbacks('App\\\\Http\\\\Reques...', Object(App\\Http\\Requests\\Banking\\Transaction))",
+          "#5 /var/www/html/vendor/laravel/framework/src/Illuminate/Container/Container.php(778): Illuminate\\Container\\Container->fireResolvingCallbacks('App\\\\Http\\\\Reques...', Object(App\\Http\\Requests\\Banking\\Transaction))",
+          "#6 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(851): Illuminate\\Container\\Container->resolve('App\\\\Http\\\\Reques...', Array, true)",
+          "#7 /var/www/html/vendor/laravel/framework/src/Illuminate/Container/Container.php(694): Illuminate\\Foundation\\Application->resolve('App\\\\Http\\\\Reques...', Array)",
+          "#8 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(836): Illuminate\\Container\\Container->make('App\\\\Http\\\\Reques...', Array)",
+          "#9 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/RouteDependencyResolverTrait.php(79): Illuminate\\Foundation\\Application->make('App\\\\Http\\\\Reques...')",
+          "#10 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/RouteDependencyResolverTrait.php(48): Illuminate\\Routing\\ControllerDispatcher->transformDependency(Object(ReflectionParameter), Array, Object(stdClass))",
+          "#11 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/RouteDependencyResolverTrait.php(28): Illuminate\\Routing\\ControllerDispatcher->resolveMethodDependencies(Array, Object(ReflectionMethod))",
+          "#12 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(41): Illuminate\\Routing\\ControllerDispatcher->resolveClassMethodDependencies(Array, Object(App\\Http\\Controllers\\Api\\Banking\\Transactions), 'store')",
+          "#13 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Route.php(262): Illuminate\\Routing\\ControllerDispatcher->dispatch(Object(Illuminate\\Routing\\Route), Object(App\\Http\\Controllers\\Api\\Banking\\Transactions), 'store')",
+          "#14 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Route.php(205): Illuminate\\Routing\\Route->runController()",
+          "#15 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php(721): Illuminate\\Routing\\Route->run()",
+          "#16 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(128): Illuminate\\Routing\\Router->Illuminate\\Routing\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#17 /var/www/html/vendor/santigarcor/laratrust/src/Middleware/LaratrustPermission.php(25): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#18 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Laratrust\\Middleware\\LaratrustPermission->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure), 'create-sales-re...')",
+          "#19 /var/www/html/app/Http/Middleware/Dropzone.php(75): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#20 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): App\\Http\\Middleware\\Dropzone->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#21 /var/www/html/app/Http/Middleware/Money.php(98): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#22 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): App\\Http\\Middleware\\Money->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#23 /var/www/html/app/Http/Middleware/DateFormat.php(39): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#24 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): App\\Http\\Middleware\\DateFormat->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#25 /var/www/html/vendor/akaunting/laravel-firewall/src/Abstracts/Middleware.php(36): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#26 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Akaunting\\Firewall\\Abstracts\\Middleware->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#27 /var/www/html/vendor/akaunting/laravel-firewall/src/Abstracts/Middleware.php(36): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#28 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Akaunting\\Firewall\\Abstracts\\Middleware->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#29 /var/www/html/vendor/akaunting/laravel-firewall/src/Abstracts/Middleware.php(36): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#30 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Akaunting\\Firewall\\Abstracts\\Middleware->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#31 /var/www/html/vendor/akaunting/laravel-firewall/src/Abstracts/Middleware.php(36): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#32 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Akaunting\\Firewall\\Abstracts\\Middleware->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#33 /var/www/html/vendor/akaunting/laravel-firewall/src/Abstracts/Middleware.php(36): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#34 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Akaunting\\Firewall\\Abstracts\\Middleware->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#35 /var/www/html/vendor/akaunting/laravel-firewall/src/Abstracts/Middleware.php(36): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#36 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Akaunting\\Firewall\\Abstracts\\Middleware->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#37 /var/www/html/vendor/akaunting/laravel-firewall/src/Abstracts/Middleware.php(29): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#38 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Akaunting\\Firewall\\Abstracts\\Middleware->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#39 /var/www/html/vendor/akaunting/laravel-firewall/src/Abstracts/Middleware.php(36): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#40 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Akaunting\\Firewall\\Abstracts\\Middleware->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#41 /var/www/html/vendor/akaunting/laravel-firewall/src/Abstracts/Middleware.php(36): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#42 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Akaunting\\Firewall\\Abstracts\\Middleware->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#43 /var/www/html/vendor/akaunting/laravel-firewall/src/Abstracts/Middleware.php(36): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#44 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Akaunting\\Firewall\\Abstracts\\Middleware->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#45 /var/www/html/vendor/akaunting/laravel-firewall/src/Abstracts/Middleware.php(36): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#46 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Akaunting\\Firewall\\Abstracts\\Middleware->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#47 /var/www/html/vendor/akaunting/laravel-language/src/Middleware/SetLocale.php(95): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#48 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Akaunting\\Language\\Middleware\\SetLocale->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#49 /var/www/html/app/Http/Middleware/CheckForReadOnlyMode.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#50 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): App\\Http\\Middleware\\CheckForReadOnlyMode->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#51 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Middleware/SubstituteBindings.php(50): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#52 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Routing\\Middleware\\SubstituteBindings->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#53 /var/www/html/app/Http/Middleware/IdentifyCompany.php(60): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#54 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): App\\Http\\Middleware\\IdentifyCompany->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#55 /var/www/html/vendor/santigarcor/laratrust/src/Middleware/LaratrustPermission.php(25): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#56 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Laratrust\\Middleware\\LaratrustPermission->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure), 'read-api')",
+          "#57 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Middleware/ThrottleRequests.php(127): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#58 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Middleware/ThrottleRequests.php(103): Illuminate\\Routing\\Middleware\\ThrottleRequests->handleRequest(Object(Dingo\\Api\\Http\\Request), Object(Closure), Array)",
+          "#59 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Middleware/ThrottleRequests.php(55): Illuminate\\Routing\\Middleware\\ThrottleRequests->handleRequestUsingNamedLimiter(Object(Dingo\\Api\\Http\\Request), Object(Closure), 'api', Object(Closure))",
+          "#60 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Routing\\Middleware\\ThrottleRequests->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure), 'api')",
+          "#61 /var/www/html/app/Http/Middleware/LogoutIfUserDisabled.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#62 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): App\\Http\\Middleware\\LogoutIfUserDisabled->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#63 /var/www/html/vendor/dingo/api/src/Http/Middleware/Auth.php(55): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#64 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Dingo\\Api\\Http\\Middleware\\Auth->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#65 /var/www/html/vendor/dingo/api/src/Http/Middleware/PrepareController.php(45): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#66 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Dingo\\Api\\Http\\Middleware\\PrepareController->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#67 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(103): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#68 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php(723): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))",
+          "#69 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php(698): Illuminate\\Routing\\Router->runRouteWithinStack(Object(Illuminate\\Routing\\Route), Object(Dingo\\Api\\Http\\Request))",
+          "#70 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php(662): Illuminate\\Routing\\Router->runRoute(Object(Dingo\\Api\\Http\\Request), Object(Illuminate\\Routing\\Route))",
+          "#71 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php(651): Illuminate\\Routing\\Router->dispatchToRoute(Object(Dingo\\Api\\Http\\Request))",
+          "#72 /var/www/html/vendor/dingo/api/src/Routing/Adapter/Laravel.php(88): Illuminate\\Routing\\Router->dispatch(Object(Dingo\\Api\\Http\\Request))",
+          "#73 /var/www/html/vendor/dingo/api/src/Routing/Router.php(518): Dingo\\Api\\Routing\\Adapter\\Laravel->dispatch(Object(Dingo\\Api\\Http\\Request), 'v3')",
+          "#74 /var/www/html/vendor/dingo/api/src/Http/Middleware/Request.php(126): Dingo\\Api\\Routing\\Router->dispatch(Object(Dingo\\Api\\Http\\Request))",
+          "#75 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(128): Dingo\\Api\\Http\\Middleware\\Request->Dingo\\Api\\Http\\Middleware\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#76 /var/www/html/vendor/barryvdh/laravel-debugbar/src/Middleware/InjectDebugbar.php(60): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#77 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Barryvdh\\Debugbar\\Middleware\\InjectDebugbar->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#78 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#79 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ConvertEmptyStringsToNull.php(31): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#80 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Foundation\\Http\\Middleware\\ConvertEmptyStringsToNull->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#81 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#82 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TrimStrings.php(40): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#83 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Foundation\\Http\\Middleware\\TrimStrings->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#84 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ValidatePostSize.php(27): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#85 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Foundation\\Http\\Middleware\\ValidatePostSize->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#86 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/PreventRequestsDuringMaintenance.php(86): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#87 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Foundation\\Http\\Middleware\\PreventRequestsDuringMaintenance->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#88 /var/www/html/vendor/fruitcake/laravel-cors/src/HandleCors.php(52): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#89 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Fruitcake\\Cors\\HandleCors->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#90 /var/www/html/vendor/fideloper/proxy/src/TrustProxies.php(57): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#91 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Fideloper\\Proxy\\TrustProxies->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#92 /var/www/html/vendor/laravel/framework/src/Illuminate/Http/Middleware/TrustHosts.php(48): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#93 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Http\\Middleware\\TrustHosts->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#94 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(103): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#95 /var/www/html/vendor/dingo/api/src/Http/Middleware/Request.php(127): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))",
+          "#96 /var/www/html/vendor/dingo/api/src/Http/Middleware/Request.php(103): Dingo\\Api\\Http\\Middleware\\Request->sendRequestThroughRouter(Object(Dingo\\Api\\Http\\Request))",
+          "#97 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Dingo\\Api\\Http\\Middleware\\Request->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#98 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(103): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))",
+          "#99 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(142): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))",
+          "#100 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(111): Illuminate\\Foundation\\Http\\Kernel->sendRequestThroughRouter(Object(Illuminate\\Http\\Request))",
+          "#101 /var/www/html/index.php(20): Illuminate\\Foundation\\Http\\Kernel->handle(Object(Illuminate\\Http\\Request))",
+          "#102 {main}"
+       ]
+    }
+ }
\ No newline at end of file
diff --git a/data/CreateTransactionIncomeSuccess.json b/data/CreateTransactionIncomeSuccess.json
new file mode 100644
index 0000000..a1dce95
--- /dev/null
+++ b/data/CreateTransactionIncomeSuccess.json
@@ -0,0 +1,94 @@
+{
+    "data":{
+       "id":8,
+       "company_id":1,
+       "type":"income",
+       "account_id":"2",
+       "paid_at":"2022-05-15T07:44:49+12:00",
+       "amount":25,
+       "amount_formatted":"$25.00",
+       "currency_code":"NZD",
+       "currency_rate":1,
+       "document_id":"None",
+       "contact_id":"None",
+       "description":"None",
+       "category_id":"3",
+       "payment_method":"bank_transfer",
+       "reference":"None",
+       "attachment":false,
+       "created_by":1,
+       "created_at":"2022-05-16T07:44:49+12:00",
+       "updated_at":"2022-05-16T07:44:49+12:00",
+       "account":{
+          "data":{
+             "id":2,
+             "company_id":1,
+             "name":"WHS Account",
+             "number":"38-9011-0510023-03",
+             "currency_code":"NZD",
+             "opening_balance":0,
+             "opening_balance_formatted":"$0.00",
+             "current_balance":300,
+             "current_balance_formatted":"$300.00",
+             "bank_name":"Kiwibank",
+             "bank_phone":"None",
+             "bank_address":"None",
+             "enabled":true,
+             "created_by":1,
+             "created_at":"2022-05-13T16:16:16+12:00",
+             "updated_at":"2022-05-13T16:16:16+12:00"
+          }
+       },
+       "category":{
+          "data":{
+             "id":3,
+             "company_id":1,
+             "name":"Sales",
+             "type":"income",
+             "color":"#6da252",
+             "enabled":true,
+             "created_by":"None",
+             "created_at":"2022-05-13T03:14:40+12:00",
+             "updated_at":"2022-05-13T03:14:40+12:00"
+          }
+       },
+       "contact":{
+          "data":{
+             "id":"None",
+             "company_id":"None",
+             "user_id":"None",
+             "type":"None",
+             "name":"N/A",
+             "email":"None",
+             "tax_number":"None",
+             "phone":"None",
+             "address":"None",
+             "website":"None",
+             "currency_code":"None",
+             "enabled":"None",
+             "reference":"None",
+             "created_by":"None",
+             "created_at":"",
+             "updated_at":""
+          }
+       },
+       "currency":{
+          "data":{
+             "id":5,
+             "company_id":1,
+             "name":"NZ Dollar",
+             "code":"NZD",
+             "rate":1,
+             "enabled":true,
+             "precision":2,
+             "symbol":"$",
+             "symbol_first":1,
+             "decimal_mark":".",
+             "thousands_separator":",",
+             "created_by":1,
+             "created_at":"2022-05-13T03:21:17+12:00",
+             "updated_at":"2022-05-13T03:21:17+12:00"
+          }
+       }
+    }
+ }
\ No newline at end of file
diff --git a/data/GetAccountsList.json b/data/GetAccountsList.json
new file mode 100644
index 0000000..d0e9765
--- /dev/null
+++ b/data/GetAccountsList.json
@@ -0,0 +1,70 @@
+{
+    "data":[
+       {
+          "id":1,
+          "company_id":1,
+          "name":"Cash",
+          "number":"1",
+          "currency_code":"NZD",
+          "opening_balance":0,
+          "opening_balance_formatted":"$0.00",
+          "current_balance":-250,
+          "current_balance_formatted":"-$250.00",
+          "bank_name":"Cash",
+          "bank_phone":"None",
+          "bank_address":"None",
+          "enabled":true,
+          "created_by":"None",
+          "created_at":"2022-05-13T03:14:40+12:00",
+          "updated_at":"2022-05-13T03:32:28+12:00"
+       },
+       {
+          "id":3,
+          "company_id":1,
+          "name":"Kiwibank Visa",
+          "number":"4446-89**-****-5385",
+          "currency_code":"NZD",
+          "opening_balance":-250,
+          "opening_balance_formatted":"-$250.00",
+          "current_balance":-250,
+          "current_balance_formatted":"-$250.00",
+          "bank_name":"None",
+          "bank_phone":"None",
+          "bank_address":"None",
+          "enabled":true,
+          "created_by":1,
+          "created_at":"2022-05-13T16:19:26+12:00",
+          "updated_at":"2022-05-13T16:19:26+12:00"
+       },
+       {
+          "id":2,
+          "company_id":1,
+          "name":"WHS Account",
+          "number":"38-9011-0510023-03",
+          "currency_code":"NZD",
+          "opening_balance":0,
+          "opening_balance_formatted":"$0.00",
+          "current_balance":200,
+          "current_balance_formatted":"$200.00",
+          "bank_name":"Kiwibank",
+          "bank_phone":"None",
+          "bank_address":"None",
+          "enabled":true,
+          "created_by":1,
+          "created_at":"2022-05-13T16:16:16+12:00",
+          "updated_at":"2022-05-13T16:16:16+12:00"
+       }
+    ],
+    "meta":{
+       "pagination":{
+          "total":3,
+          "count":3,
+          "per_page":25,
+          "current_page":1,
+          "total_pages":1,
+          "links":{
+             
+          }
+       }
+    }
+ }
\ No newline at end of file
diff --git a/data/pingFailure.json b/data/pingFailure.json
new file mode 100644
index 0000000..b598e45
--- /dev/null
+++ b/data/pingFailure.json
@@ -0,0 +1,55 @@
+{
+    "message":"Invalid credentials.",
+    "status_code":401,
+    "debug":{
+       "line":352,
+       "file":"/var/www/html/vendor/laravel/framework/src/Illuminate/Auth/SessionGuard.php",
+       "class":"Symfony\\Component\\HttpKernel\\Exception\\UnauthorizedHttpException",
+       "trace":[
+          "#0 /var/www/html/vendor/laravel/framework/src/Illuminate/Auth/SessionGuard.php(308): Illuminate\\Auth\\SessionGuard->failedBasicResponse()",
+          "#1 /var/www/html/vendor/laravel/framework/src/Illuminate/Auth/AuthManager.php(336): Illuminate\\Auth\\SessionGuard->onceBasic('email')",
+          "#2 /var/www/html/vendor/dingo/api/src/Auth/Provider/Basic.php(52): Illuminate\\Auth\\AuthManager->__call('onceBasic', Array)",
+          "#3 /var/www/html/vendor/dingo/api/src/Auth/Auth.php(82): Dingo\\Api\\Auth\\Provider\\Basic->authenticate(Object(Dingo\\Api\\Http\\Request), Object(Dingo\\Api\\Routing\\Route))",
+          "#4 /var/www/html/vendor/dingo/api/src/Http/Middleware/Auth.php(52): Dingo\\Api\\Auth\\Auth->authenticate(Array)",
+          "#5 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Dingo\\Api\\Http\\Middleware\\Auth->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#6 /var/www/html/vendor/dingo/api/src/Http/Middleware/PrepareController.php(45): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#7 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Dingo\\Api\\Http\\Middleware\\PrepareController->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#8 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(103): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#9 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php(723): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))",
+          "#10 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php(698): Illuminate\\Routing\\Router->runRouteWithinStack(Object(Illuminate\\Routing\\Route), Object(Dingo\\Api\\Http\\Request))",
+          "#11 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php(662): Illuminate\\Routing\\Router->runRoute(Object(Dingo\\Api\\Http\\Request), Object(Illuminate\\Routing\\Route))",
+          "#12 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php(651): Illuminate\\Routing\\Router->dispatchToRoute(Object(Dingo\\Api\\Http\\Request))",
+          "#13 /var/www/html/vendor/dingo/api/src/Routing/Adapter/Laravel.php(88): Illuminate\\Routing\\Router->dispatch(Object(Dingo\\Api\\Http\\Request))",
+          "#14 /var/www/html/vendor/dingo/api/src/Routing/Router.php(518): Dingo\\Api\\Routing\\Adapter\\Laravel->dispatch(Object(Dingo\\Api\\Http\\Request), 'v3')",
+          "#15 /var/www/html/vendor/dingo/api/src/Http/Middleware/Request.php(126): Dingo\\Api\\Routing\\Router->dispatch(Object(Dingo\\Api\\Http\\Request))",
+          "#16 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(128): Dingo\\Api\\Http\\Middleware\\Request->Dingo\\Api\\Http\\Middleware\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#17 /var/www/html/vendor/barryvdh/laravel-debugbar/src/Middleware/InjectDebugbar.php(60): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#18 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Barryvdh\\Debugbar\\Middleware\\InjectDebugbar->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#19 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#20 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ConvertEmptyStringsToNull.php(31): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#21 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Foundation\\Http\\Middleware\\ConvertEmptyStringsToNull->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#22 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#23 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TrimStrings.php(40): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#24 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Foundation\\Http\\Middleware\\TrimStrings->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#25 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ValidatePostSize.php(27): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#26 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Foundation\\Http\\Middleware\\ValidatePostSize->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#27 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/PreventRequestsDuringMaintenance.php(86): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#28 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Foundation\\Http\\Middleware\\PreventRequestsDuringMaintenance->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#29 /var/www/html/vendor/fruitcake/laravel-cors/src/HandleCors.php(52): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#30 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Fruitcake\\Cors\\HandleCors->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#31 /var/www/html/vendor/fideloper/proxy/src/TrustProxies.php(57): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#32 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Fideloper\\Proxy\\TrustProxies->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#33 /var/www/html/vendor/laravel/framework/src/Illuminate/Http/Middleware/TrustHosts.php(48): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#34 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Http\\Middleware\\TrustHosts->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#35 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(103): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
+          "#36 /var/www/html/vendor/dingo/api/src/Http/Middleware/Request.php(127): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))",
+          "#37 /var/www/html/vendor/dingo/api/src/Http/Middleware/Request.php(103): Dingo\\Api\\Http\\Middleware\\Request->sendRequestThroughRouter(Object(Dingo\\Api\\Http\\Request))",
+          "#38 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Dingo\\Api\\Http\\Middleware\\Request->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
+          "#39 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(103): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))",
+          "#40 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(142): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))",
+          "#41 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(111): Illuminate\\Foundation\\Http\\Kernel->sendRequestThroughRouter(Object(Illuminate\\Http\\Request))",
+          "#42 /var/www/html/index.php(20): Illuminate\\Foundation\\Http\\Kernel->handle(Object(Illuminate\\Http\\Request))",
+          "#43 {main}"
+       ]
+    }
+ }
\ No newline at end of file
diff --git a/data/pingSuccess.json b/data/pingSuccess.json
new file mode 100644
index 0000000..b8c4d02
--- /dev/null
+++ b/data/pingSuccess.json
@@ -0,0 +1,4 @@
+{
+    "status": "ok",
+    "timestamp": "2022-05-14T04:47:30.612024Z"
+}
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..8f91654
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+requests >= 2.21.0
+pytest
\ No newline at end of file
diff --git a/scratch.py b/scratch.py
new file mode 100644
index 0000000..1fd84ed
--- /dev/null
+++ b/scratch.py
@@ -0,0 +1,7 @@
+def MergeDict(dict1, dict2):
+    dict2.update(dict1)
+    return dict2
+
+dict1 = {'company_id': 1}
+dict2 = {'page':1, 'limit': 25}
+
diff --git a/tests/api_test.py b/tests/api_test.py
new file mode 100644
index 0000000..2c8594b
--- /dev/null
+++ b/tests/api_test.py
@@ -0,0 +1,106 @@
+import sys
+from this import d
+sys.path.insert(1, '.')
+import pytest
+import akauntingpy
+from akauntingpy.exceptions import *
+from helpers import RetrieveJSONFromFile
+from requests.auth import HTTPBasicAuth
+
+class TestAPI:
+    @pytest.fixture()
+    def setUp(self):
+        c = akauntingpy.Client("https://akaunting.guise.net.nz/api",
+                              "aaron@guise.net.nz",
+                              "L3Tm31N0w",
+                              1)
+        yield c
+        
+    @pytest.fixture()
+    def setUpFailed(self):
+        c = akauntingpy.Client("https://akaunting.guise.net.nz/api",
+                              "aaron@guise.net.nz",
+                              "L3Tm31N0w1",
+                              1)
+        yield c
+            
+    def test_init(self, setUp):
+        c = setUp
+        assert isinstance(c, akauntingpy.Client)
+        assert c.url == "https://akaunting.guise.net.nz/api"
+        assert isinstance(c.authentication, HTTPBasicAuth) 
+
+    def test_ping_success(self, setUp, requests_mock):
+         c = setUp
+         requests_mock.get(c.url + '/ping', 
+                           json=RetrieveJSONFromFile("data/pingSuccess.json"),
+                           status_code=200)
+         data = c.ping()
+         # The returned data should have status = ok
+         assert data['status'] == 'ok'
+         
+    def test_ping_failed(self, setUpFailed, requests_mock):
+         c = setUpFailed
+         requests_mock.get(c.url + '/ping', 
+                           json=RetrieveJSONFromFile("data/pingFailure.json"), 
+                           status_code=401)
+         with pytest.raises(MissingPermission, match="Invalid credentials."):
+            
+            data = c.ping()
+            assert data['status_code'] == 401
+            
+    def test_get_accounts(self, setUp, requests_mock):
+        c = setUp
+        requests_mock.get(c.url + "/accounts",
+                          json=RetrieveJSONFromFile("data/GetAccountsList.json"))
+        data = c.get_accounts(params={'page': 1, 'limit': 200})
+        
+    def test_create_transaction_success(self, setUp, requests_mock,
+                            type='income', # Payment method type
+                            account_id=2, # Account ID to assign
+                            category_id=3, # Category ID to assign
+                            contact_id=None, # Contact ID/Client to assign
+                            paid_at="2022-05-15", # Date of expense/transfer or income
+                            reference=None, # Reference for the payment
+                            payment_method="bank_transfer", # Payment method
+                            currency_code="NZD", # Currency code
+                            currency_rate=1, # Currency rate
+                            amount="25.00", # Amount received/paid
+                            ):
+        c = setUp
+        requests_mock.post(c.url + "/transactions",
+                          json=RetrieveJSONFromFile("data/CreateTransactionIncomeSuccess.json"),
+                          status_code=201)
+        data = c.create_transaction(type=type,
+                                    account_id=account_id,
+                                    category_id=category_id,
+                                    paid_at=paid_at,
+                                    contact_id=contact_id,
+                                    payment_method=payment_method,
+                                    reference=reference,
+                                    currency_code=currency_code,
+                                    currency_rate=currency_rate,
+                                    amount=amount,
+                                    description="Some description of the transaction"
+                                    )
+        
+    def test_create_transaction_failed(self, setUp, requests_mock,
+                            contact_id=None, # Contact ID/Client to assign
+                            reference=None, # Reference for the payment
+                            currency_code="NZD", # Currency code
+                            currency_rate=1, # Currency rate
+                            amount="25.00", # Amount received/paid
+                            ):
+        c = setUp
+        requests_mock.post(c.url + "/transactions",
+                          json=RetrieveJSONFromFile("data/CreateTransactionIncomeFailed.json"),
+                          status_code=422)
+        with pytest.raises(InvalidData, match="The given data was invalid.*"):
+            data = c.create_transaction(contact_id=contact_id,
+                                        reference=reference,
+                                        currency_code=currency_code,
+                                        currency_rate=currency_rate,
+                                        amount=amount,
+                                        description="Some description of the transaction"
+                                        )
+        
diff --git a/tests/helpers.py b/tests/helpers.py
new file mode 100644
index 0000000..a02131e
--- /dev/null
+++ b/tests/helpers.py
@@ -0,0 +1,7 @@
+import json 
+
+def RetrieveJSONFromFile(filename):
+    with open(filename) as f:
+        data = json.load(f)
+
+        return data
\ No newline at end of file