diff --git a/api/blueprints/finstitutions/payments/auth.py b/api/blueprints/finstitutions/payments/auth.py
index 7bc4ffc..974af86 100644
--- a/api/blueprints/finstitutions/payments/auth.py
+++ b/api/blueprints/finstitutions/payments/auth.py
@@ -66,7 +66,7 @@ from shared import constants
 from bson.objectid import ObjectId
 
 # Data Models:
-from models.api.software.auth import SoftwareAuthRequestHeaders, SoftwareAuthRequestData
+from models.api.finstitutions.payments.auth import PGAuthRequestHeaders, PGAuthRequestData
 from models.core.auth_token import CoreAuthTokenModel
 
 # For asynchronous activities:
@@ -81,7 +81,7 @@ import asyncio
 
 
 # Related to Quart:
-fi_auth_bp = Blueprint("fi_auth", __name__)
+pg_auth_bp = Blueprint("pg_auth", __name__)
 
 
 #   *****************************************************************************************************************
@@ -101,7 +101,7 @@ fi_auth_bp = Blueprint("fi_auth", __name__)
 #   *****************************************************************************************************************
 
 
-@fi_auth_bp.record_once
+@pg_auth_bp.record_once
 def init(blueprint_setup_state):
 
     # This gets called when the blueprint is registered.
@@ -112,7 +112,7 @@ def init(blueprint_setup_state):
 # ---------------------------------------------------------------------------------------------------------------------
 
 
-@fi_auth_bp.route("/auth", methods = ["POST"])
+@pg_auth_bp.route("/auth", methods = ["POST"])
 @set_api_version(api_version = "1.0.0")
 @read_input(sanitize_headers = False, sanitize_data = False)
 @get_session_info(key = "X-Session-Token", session_coro = "get_session")
@@ -120,7 +120,7 @@ def init(blueprint_setup_state):
     attr_name = "logs_mongo",
     project = constants.PROJECT_NAME,
     log_type = constants.MODULE_NAME,
-    operation = "smsAuthApi",
+    operation = "pgAuthApi",
     log_input = True,
     log_output = True,
     sensitive_keys = ["sessionToken", "X-Session-Token"]
@@ -128,19 +128,19 @@ def init(blueprint_setup_state):
 @log_chain_to_mongo(attr_name = "logs_mongo")
 @should_not_be_under_maintenance(attr_name = "is_under_maintenance")
 @validate_input(
-    header_validator = lambda x: SoftwareAuthRequestHeaders(**x).model_dump(),
-    data_validator = lambda x: SoftwareAuthRequestData(**x)
+    header_validator = lambda x: PGAuthRequestHeaders(**x).model_dump(),
+    data_validator = lambda x: PGAuthRequestData(**x)
 )
 @handle_cancelled_request()
-async def authorize_software_client(
-        inbound_headers: dict | SoftwareAuthRequestHeaders = None,
-        inbound_data: dict | SoftwareAuthRequestData = None,
+async def authorize_payment_gateway(
+        inbound_headers: dict | PGAuthRequestHeaders = None,
+        inbound_data: dict | PGAuthRequestData = None,
         inbound_files: dict = None,
         **kwargs
 ):
 
     """
-    God knows. Don't ask.
+    To accept the authorization details of payment gateways.
     :param inbound_headers: auto-extracted by the decorators.
     :param inbound_data: auto-extracted by the decorators.
     :param inbound_files: auto-extracted by the decorators.
@@ -163,19 +163,22 @@ async def authorize_software_client(
     # Start by assuming failure:
     success = False
 
-    # ┏┳┓┓     ┏┓┏┓  ┏┓┏┏•     ┏┓┳
-    #  ┃ ┣┓┏┓  ┃ ┣┫  ┃┃╋╋┓┏┏┓  ┣┫┃
-    #  ┻ ┛┗┗   ┗┛┛┗  ┗┛┛┛┗┗┗   ┛┗┻
+    # ┏┓  ┏    •        ┳┳┓  ┏┓       ┏┓
+    # ┗┓┏┓╋┏┓┏┓┓┏┏┓┏┳┓  ┃┃┃━━┃┃┏┓┏┏┓  ┣ ┓┏┏┓┏┓┏┓┏┏
+    # ┗┛┗┻┛┗┻┛ ┗┗┗┛┛┗┗  ┛ ┗  ┣┛┗ ┛┗┻  ┗┛┛┗┣┛┛ ┗ ┛┛
+    #                        ┛
 
-    if inbound_data.softwareClient == "theCaOfficeAi":
+    if inbound_data.client == "safaricomMPesaExpress":
 
         auth_token = CoreAuthTokenModel(
-            serviceType = "software",
-            client = inbound_data.softwareClient,
+            serviceType = "paymentGateway",
+            client = inbound_data.client,
             authType = "auth",
             auth = inbound_data.auth.model_dump(),
             user = kwargs.get("session_info"),
-            clientUserId = {},
+            clientUserId = {
+                "businessShortCode": inbound_data.auth.businessShortCode
+            },
             status = "active",
             syncFreq = 60
         )
@@ -207,7 +210,7 @@ async def authorize_software_client(
         status_code = StatusCodes.OK if success else StatusCodes.FAILED,
         http_code = HttpCodes.SUCCESS if success else HttpCodes.INTERNAL_SERVER_ERROR,
         data = {
-            "client": inbound_data.softwareClient,
+            "client": inbound_data.client,
             "authorized": success
         }
     )
diff --git a/api/main.py b/api/main.py
index 65ca6e9..bb59a3c 100644
--- a/api/main.py
+++ b/api/main.py
@@ -96,6 +96,7 @@ from api.blueprints.sms.send import sms_send_bp
 # from api.blueprints.chat.auth import chat_auth_bp
 # from api.blueprints.chat.webhook import chat_webhook_bp
 from api.blueprints.software.auth import sw_auth_bp
+from api.blueprints.finstitutions.payments.auth import pg_auth_bp
 from api.blueprints.tech.chat_alerts import tech_chat_alert_bp
 from api.blueprints.test.callback import test_callback_bp
 from api.blueprints.ai.llm.invoke import llm_invoke_bp
@@ -137,6 +138,7 @@ app.register_blueprint(sms_send_bp, url_prefix = f"/{MODULE_BASE}/sms")
 # app.register_blueprint(chat_auth_bp, url_prefix = f"/{MODULE_BASE}/chat")
 # app.register_blueprint(chat_webhook_bp, url_prefix = f"/{MODULE_BASE}/chat")
 app.register_blueprint(sw_auth_bp, url_prefix = f"/{MODULE_BASE}/software")
+app.register_blueprint(pg_auth_bp, url_prefix = f"/{MODULE_BASE}/finstitutions/payments")
 app.register_blueprint(tech_chat_alert_bp, url_prefix = f"/{MODULE_BASE}/tech/alert")
 app.register_blueprint(test_callback_bp, url_prefix = f"/{MODULE_BASE}/test")
 app.register_blueprint(llm_invoke_bp, url_prefix = f"/{MODULE_BASE}/ai")
diff --git a/models/api/finstitutions/payments/auth.py b/models/api/finstitutions/payments/auth.py
index 0f1966f..bd6c515 100644
--- a/models/api/finstitutions/payments/auth.py
+++ b/models/api/finstitutions/payments/auth.py
@@ -75,25 +75,25 @@ REGEX_SESSION_TOKEN = r"^[a-f0-9]{8}-[a-f0-9]{4}-[1-5][a-f0-9]{3}-[89ab][a-f0-9]
 #   *****************************************************************************************************************
 
 
-class TheCAOfficeAIAuth(BaseModel):
+class SafaricomMPesaExpressAuth(BaseModel):
 
-    authorizeSoftware: bool = Field(
-        description = "god knows; don't ask",
+    consumerKey: str = Field(
+        description = "the app's consumer key given by safaricom; found in 'my apps'",
         frozen = True
     )
 
-    authorizeMailMessaging: bool = Field(
-        description = "god knows; don't ask",
+    consumerSecret: str = Field(
+        description = "the app's consumer secret given by safaricom; found in 'my apps'",
         frozen = True
     )
 
-    authorizeCompliancePortal: bool = Field(
-        description = "god knows; don't ask",
+    businessShortCode: str = Field(
+        description = "your app's business short code; found in 'my apps'",
         frozen = True
     )
 
-    authorizeFinancialInstitution: bool = Field(
-        description = "god knows; don't ask",
+    appPasskey: str = Field(
+        description = "your app's passkey; taken from human representative",
         frozen = True
     )
 
@@ -109,7 +109,7 @@ class TheCAOfficeAIAuth(BaseModel):
 # ---------------------------------------------------------------------------------------------------------------------
 
 
-class SoftwareAuthRequestHeaders(BaseModel):
+class PGAuthRequestHeaders(BaseModel):
 
     sessionToken: str = Field(
         description = "the session token of the user who is requesting the service",
@@ -133,10 +133,10 @@ class SoftwareAuthRequestHeaders(BaseModel):
 # ---------------------------------------------------------------------------------------------------------------------
 
 
-class SoftwareAuthRequestData(BaseModel):
+class PGAuthRequestData(BaseModel):
 
-    softwareClient: Literal["theCaOfficeAi"] = Field(alias = "client")
-    auth: Union[TheCAOfficeAIAuth]
+    client: Literal["safaricomMPesaExpress"] = Field(alias = "client")
+    auth: Union[SafaricomMPesaExpressAuth]
 
     # ┏┓    ┏•
     # ┃ ┏┓┏┓╋┓┏┓
diff --git a/models/core/auth_token.py b/models/core/auth_token.py
index 7541d49..b5abc62 100644
--- a/models/core/auth_token.py
+++ b/models/core/auth_token.py
@@ -89,7 +89,7 @@ class CoreAuthTokenModel(BaseModel):
         alias = "_id"
     )
 
-    serviceType: Literal["software", "email", "sms", "chat"] = Field(
+    serviceType: Literal["software", "email", "sms", "chat", "paymentGateway"] = Field(
         description = "the kind of service this message was sent/received from",
         frozen = True
     )
@@ -99,7 +99,7 @@ class CoreAuthTokenModel(BaseModel):
         "telegram", "whatsapp",  # .................. Chat Clients
         "nimbusSmsIndia", "savvyBulkSmsKenya",  # ... SMS Clients
         "razorpay", "safaricomMPesaExpress",  # ..... Payment Gateways
-        "theCaOfficeAi"  # .......................... God knows, don't ask.
+        "theCaOfficeAi"  # .......................... Software
     ] = Field(
         description = "the third-part client that was used",
         frozen = True