diff --git a/app/__init__.py b/app/__init__.py
index a4a03c8..e5e7e35 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -2,7 +2,8 @@ from flask import Flask
 from flask_cors import CORS
 from app.config import Config
 from app.routes import auth_bp, autocall_bp
-from app.errors import method_not_allowed, unsupported_media_type
+from app.response import (method_not_allowed, unsupported_media_type, not_found, bad_request)
+from app.extensions import db
 
 
 def create_app():
@@ -12,15 +13,20 @@ def create_app():
     # Load configuration
     app.config.from_object(Config)
 
+    # Setup CORS
     CORS(app)
 
     # Register blueprints
     app.register_blueprint(auth_bp)
     app.register_blueprint(autocall_bp, url_prefix="/autocall")
 
-
     # Error Handlers
     app.register_error_handler(405, method_not_allowed)
     app.register_error_handler(415, unsupported_media_type)
+    app.register_error_handler(404, not_found)
+    app.register_error_handler(400, bad_request)
+
+    # Database
+    db.init_app(app)
 
     return app
diff --git a/app/config.py b/app/config.py
index 9a20816..917a7fb 100644
--- a/app/config.py
+++ b/app/config.py
@@ -28,5 +28,15 @@ class Config:
         "BANK_CALL_BASIC_AUTH_PASSWORD", "password"
     )
 
+    DATABASE_USER = os.getenv("DATABASE_USER")
+    DATABASE_PASSWORD = os.getenv("DATABASE_PASSWORD")
+    DATABASE_HOST = os.getenv("DATABASE_HOST")
+    DATABASE_NAME = os.getenv("DATABASE_NAME")
+    DATABASE_PORT = os.getenv("DATABASE_PORT", 10532)
+
+    SQLALCHEMY_DATABASE_URI = f"postgresql+psycopg2://{DATABASE_USER}:{DATABASE_PASSWORD}@{DATABASE_HOST}:{DATABASE_PORT}/{DATABASE_NAME}"
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
+
+
 
 settings = Config()
diff --git a/app/errors/__init__.py b/app/errors/__init__.py
deleted file mode 100644
index 15c380c..0000000
--- a/app/errors/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-from .handlers import method_not_allowed, unsupported_media_type
\ No newline at end of file
diff --git a/app/extensions.py b/app/extensions.py
new file mode 100644
index 0000000..2e1eeb6
--- /dev/null
+++ b/app/extensions.py
@@ -0,0 +1,3 @@
+from flask_sqlalchemy import SQLAlchemy
+
+db = SQLAlchemy()
\ No newline at end of file
diff --git a/app/integrations/simbrella.py b/app/integrations/simbrella.py
index b279368..72217f2 100644
--- a/app/integrations/simbrella.py
+++ b/app/integrations/simbrella.py
@@ -2,7 +2,9 @@ import requests
 from app.config import settings
 from app.utils.auth import get_headers
 from app.utils.logger import logger
-from flask import jsonify
+from flask import jsonify, current_app
+from app.services.transactions import TransactionService
+
 
 class SimbrellaClient:
 
@@ -11,9 +13,16 @@ class SimbrellaClient:
     @staticmethod
     def disbursement(data):
         api_url = f"{SimbrellaClient.BANK_CALL_BASE_URL}/Disbursement"
-        logger.info(f"BANK_CALL_BASE_URL = {SimbrellaClient.BANK_CALL_BASE_URL}")
         logger.info(f"Calling Disbursement endpoint with data: {data}")
 
+        # Check if the transaction exists
+        logger.info(f"Checking if transaction exists")
+        transaction = TransactionService.get_transaction_by_transaction_id(transaction_id=data['transactionId'])
+        logger.info(f"Response from database: {transaction}")
+
+        if not transaction:
+            return 0
+
         disbursement_data ={
             "requestId": data['requestId'],
             "transactionId": data['transactionId'],
@@ -45,7 +54,6 @@ class SimbrellaClient:
     @staticmethod
     def collect_loan(data):
         api_url = f"{SimbrellaClient.BANK_CALL_BASE_URL}/CollectLoan"
-        logger.info(f"BANK_CALL_BASE_URL = {SimbrellaClient.BANK_CALL_BASE_URL}")
         logger.info(f"Calling CollectLoan endpoint with data: {data}")
 
         collect_loan_data = {
@@ -76,14 +84,7 @@ class SimbrellaClient:
 
     @staticmethod
     def verify_transaction():
-        # api_url = f"{SimbrellaClient.BANK_CALL_BASE_URL}/TransactionVerify"
-        # logger.info(f"BANK_CALL_BASE_URL = {SimbrellaClient.BANK_CALL_BASE_URL}")
-        # logger.info(f"Calling TransactionVerify endpoint with data: {data}")
-
         try:
-        #     logger.info(f"Here is your TransactionVerify Request data ***** : {data}")
-        #     response = requests.post(api_url, json=data, headers=get_headers())
-        #     logger.info(f"TransactionVerify response: {response.json()}")
 
             return {
                 "status": "00",
@@ -96,16 +97,9 @@ class SimbrellaClient:
 
     @staticmethod
     def refresh_disbursement(data):
-        # api_url = f"{SimbrellaClient.BANK_CALL_BASE_URL}/Disbursement"
-        # logger.info(f"BANK_CALL_BASE_URL = {SimbrellaClient.BANK_CALL_BASE_URL}")
-        # logger.info(f"Calling Disbursement endpoint with data: {data}")
 
         try:
             logger.info(f"Here is your Disbursement Request data ***** : {data}")
-            # response = requests.post(api_url, json=data, headers=get_headers())
-            # logger.info(f"Disbursement response: {response.json()}")
-
-            # return response.json()
 
             return data
 
@@ -115,19 +109,16 @@ class SimbrellaClient:
 
     @staticmethod
     def payment_callback(data):
-        # api_url = f"{SimbrellaClient.BANK_CALL_BASE_URL}/Payment"
-        # logger.info(f"BANK_CALL_BASE_URL = {SimbrellaClient.BANK_CALL_BASE_URL}")
-        # logger.info(f"Calling Payment Callback endpoint with data: {data}")
 
         try:
             logger.info(f"Here is your Payment Callback Request data ***** : {data}")
-            # response = requests.post(api_url, json=data, headers=get_headers())
-            # logger.info(f"Payment Callback response: {response.json()}")
-
-            # return response.json()
 
             return data
 
         except Exception as e:
             logger.info(f"Failed to call Payment Callback endpoint: {e}")
-            raise
\ No newline at end of file
+            raise
+
+    @staticmethod
+    def check_transaction(txn_id):
+        return run_in_app_context(Transaction.get_transaction_by_id(txn_id))
\ No newline at end of file
diff --git a/app/models/__init__.py b/app/models/__init__.py
new file mode 100644
index 0000000..0f0d015
--- /dev/null
+++ b/app/models/__init__.py
@@ -0,0 +1,3 @@
+from .transactions import Transaction
+
+__all__ = ['Transaction']
\ No newline at end of file
diff --git a/app/models/transactions.py b/app/models/transactions.py
new file mode 100644
index 0000000..17cb957
--- /dev/null
+++ b/app/models/transactions.py
@@ -0,0 +1,25 @@
+from app.extensions import db
+from datetime import datetime, timezone
+
+class Transaction(db.Model):
+    __tablename__ = "transactions"
+
+    id = db.Column(
+        db.Integer,
+        primary_key=True,
+        autoincrement=True,
+    )
+    transaction_id = db.Column(db.String(50), nullable=False)
+    account_id = db.Column(db.String(50), nullable=True)
+    customer_id = db.Column(db.String(50), nullable=True)
+    type = db.Column(db.String(50), nullable=False)
+    channel = db.Column(db.String(50), nullable=False)
+    created_at = db.Column(db.DateTime, default=datetime.now(timezone.utc))
+    updated_at = db.Column(db.DateTime, default=datetime.now(timezone.utc), onupdate=datetime.now(timezone.utc))
+
+    def __repr__(self):
+        return f'<Transaction {self.id}>'
+
+    @classmethod
+    def get_transaction_by_transaction_id(cls, transaction_id):
+        return cls.query.filter_by(transaction_id=transaction_id).first()
\ No newline at end of file
diff --git a/app/response/__init__.py b/app/response/__init__.py
new file mode 100644
index 0000000..7c0277e
--- /dev/null
+++ b/app/response/__init__.py
@@ -0,0 +1,2 @@
+from .handlers import (method_not_allowed, unsupported_media_type,
+not_found, bad_request, success, created, updated)
\ No newline at end of file
diff --git a/app/errors/handlers.py b/app/response/handlers.py
similarity index 70%
rename from app/errors/handlers.py
rename to app/response/handlers.py
index 30257b3..2ce566a 100644
--- a/app/errors/handlers.py
+++ b/app/response/handlers.py
@@ -16,3 +16,15 @@ def bad_request(error):
 
 def unsupported_media_type(error):
     return ResponseHelper.error(message="Unsupported Media Type", status_code=415)
+
+
+def success(data):
+    return ResponseHelper.success(data=data)
+
+
+def created(data):
+    return ResponseHelper.created(data=data)
+
+
+def updated(data):
+    return ResponseHelper.updated(data=data)
diff --git a/app/services/__init__.py b/app/services/__init__.py
new file mode 100644
index 0000000..6cb6078
--- /dev/null
+++ b/app/services/__init__.py
@@ -0,0 +1 @@
+from .transactions import TransactionService
\ No newline at end of file
diff --git a/app/services/transactions.py b/app/services/transactions.py
new file mode 100644
index 0000000..bc09457
--- /dev/null
+++ b/app/services/transactions.py
@@ -0,0 +1,10 @@
+from app.models import Transaction
+
+class TransactionService:
+
+    @staticmethod
+    def get_transaction_by_transaction_id(transaction_id):
+        """
+        Get the transaction by ID
+        """
+        return Transaction.get_transaction_by_transaction_id(transaction_id)
\ No newline at end of file
diff --git a/app/utils/auth.py b/app/utils/auth.py
index 5daf068..0523774 100644
--- a/app/utils/auth.py
+++ b/app/utils/auth.py
@@ -2,14 +2,8 @@ from app.config import settings
 
 
 def get_headers():
-    # return {
-    #     "Content-Type": "application/json",
-    #     "x-api_key": settings.BANK_CALL_API_KEY,
-    #     "App-Id": settings.BANK_CALL_APP_ID,
-    # }
     return {
         "Content-Type": "application/json",
-        "x-api-key":  "test-api-key-12345",
-        "App-Id": "app1",
+        "x-api-key": settings.BANK_CALL_API_KEY,
+        "App-Id": settings.BANK_CALL_APP_ID,
     }
-
diff --git a/openapi.yml b/openapi.yml
index 8db5711..c4bc462 100644
--- a/openapi.yml
+++ b/openapi.yml
@@ -95,6 +95,24 @@ paths:
                   unicode:
                     type: boolean
                     example: true
+      responses:
+        200:
+          description: A successful response
+  /autocall/refresh-verify-disbursement:
+    get:
+      summary: Refresh the disbursement to verify
+      responses:
+        200:
+          description: A successful response
+  /autocall/refresh-disbursement:
+    get:
+      summary: Refresh the disbursement
+      responses:
+        200:
+          description: A successful response
+  /autocall/payment-callback:
+    get:
+      summary: The Payment callback
       responses:
         200:
           description: A successful response
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index a5968da..a9e0716 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,4 +5,7 @@ marshmallow==3.19.0
 Flask-Cors==3.0.10
 gunicorn
 requests
-confluent-kafka==1.9.2
\ No newline at end of file
+confluent-kafka==1.9.2
+flask-sqlalchemy
+psycopg2-binary
+alembic
\ No newline at end of file
diff --git a/wsgi.py b/wsgi.py
index 55e8617..a5c275c 100644
--- a/wsgi.py
+++ b/wsgi.py
@@ -1,35 +1,37 @@
+import threading
 from app import create_app
 from app.integrations import KafkaIntegration
 from app.config import settings
 from app.utils.logger import logger
 
 app = create_app()
+kafka = KafkaIntegration()
+
+def start_kafka_consumer(app):
+    with app.app_context():
+        logger.info("Starting Kafka consumer...")
+        while True:
+            try:
+
+                message = kafka.receive_disbursement_messages(
+                    topic=settings.KAFKA_PAYMENT_TOPIC, timeout=settings.KAFKA_TIMEOUT
+                )
+
+                if message:
+                    logger.info(f"Processed message: {message}")
+                else:
+                    logger.info("No message received within timeout")
+
+
+            except Exception as e:
+                logger.error(f"Error while receiving message: {e}")
+
+
 
 if __name__ != "__main__":
 
-    #Expose WSGI app instance for Gunicorn
+    # Expose WSGI app instance for Gunicorn
     wsgi_app = app
 
-    kafka = KafkaIntegration()
-
-    logger.info("Starting Kafka consumer...")
-    while True:
-        try:
-
-            message = kafka.receive_disbursement_messages(
-                topic=settings.KAFKA_PAYMENT_TOPIC, timeout=settings.KAFKA_TIMEOUT
-            )
-
-            if message:
-                logger.info(f"Processed message: {message}")
-            else:
-                logger.info("No message received within timeout")
-
-
-        except Exception as e:
-            logger.error(f"Error while receiving message: {e}")
-            raise
-
-
-    # Expose WSGI app instance for Gunicorn
-    # wsgi_app = app
+    # Start kafka in a thread
+    threading.Thread(target=start_kafka_consumer, args=(app,), daemon=True).start()
\ No newline at end of file