API Integration Framework

Production-grade API integration and workflow orchestration system—connecting multiple tools, services, and data sources into a reliable, event-driven execution layer.

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🎯 Overview

This framework provides a robust foundation for building API integrations that businesses depend on for daily operations—with built-in retry logic, error handling, and monitoring.

┌─────────────┐     ┌─────────────┐     ┌─────────────┐
│   Webhook   │────▶│   Event     │────▶│  Workflow   │
│   Receiver  │     │   Router    │     │   Engine    │
└─────────────┘     └─────────────┘     └─────────────┘
                                              │
        ┌─────────────────────────────────────┼─────────────────────────────────────┐
        │                                     │                                     │
        ▼                                     ▼                                     ▼
┌─────────────┐                       ┌─────────────┐                       ┌─────────────┐
│    CRM      │                       │  Database   │                       │   Third     │
│    Sync     │                       │    Sync     │                       │   Party     │
└─────────────┘                       └─────────────┘                       └─────────────┘

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✨ Features

• Webhook Management - Receive, validate, and route incoming webhooks
• Event-Driven Architecture - React to events from any connected system
• Retry Logic - Exponential backoff with configurable retry policies
• Idempotency - Guaranteed exactly-once processing
• Error Handling - Dead letter queues and alerting
• Rate Limiting - Respect API limits across all integrations
• Monitoring - Centralized logging and metrics

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🏗️ Architecture

src/
├── api/                 # API endpoints
│   ├── webhooks.py
│   └── health.py
├── core/                # Core framework
│   ├── event_router.py
│   ├── workflow_engine.py
│   ├── retry_handler.py
│   └── idempotency.py
├── connectors/          # API connectors
│   ├── base_connector.py
│   ├── rest_connector.py
│   ├── graphql_connector.py
│   └── soap_connector.py
├── integrations/        # Pre-built integrations
│   ├── salesforce.py
│   ├── hubspot.py
│   ├── stripe.py
│   ├── slack.py
│   └── postgres.py
├── workflows/           # Workflow definitions
│   ├── sync_contacts.py
│   ├── process_payment.py
│   └── notify_team.py
└── monitoring/          # Observability
    ├── logger.py
    ├── metrics.py
    └── alerts.py

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🚀 Quick Start

# Clone repository
git clone https://github.com/daveedashar/api-integration-framework.git
cd api-integration-framework

# Install dependencies
pip install -r requirements.txt

# Configure environment
cp .env.example .env

# Run the service
python -m src.main

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📋 Usage Example

Define a Connector

from src.connectors import RESTConnector

class HubSpotConnector(RESTConnector):
    base_url = "https://api.hubapi.com"
    
    def __init__(self, api_key: str):
        super().__init__()
        self.headers = {"Authorization": f"Bearer {api_key}"}
    
    def get_contacts(self, limit: int = 100):
        return self.get(f"/crm/v3/objects/contacts?limit={limit}")
    
    def create_contact(self, data: dict):
        return self.post("/crm/v3/objects/contacts", json=data)

Define a Workflow

from src.core import Workflow, step

class SyncContactsWorkflow(Workflow):
    
    @step(retry=3, timeout=30)
    def fetch_from_source(self, event):
        return self.hubspot.get_contacts()
    
    @step(retry=3, timeout=30)
    def transform_data(self, contacts):
        return [self.map_contact(c) for c in contacts]
    
    @step(retry=5, timeout=60)
    def sync_to_destination(self, contacts):
        return self.salesforce.bulk_upsert(contacts)

Register Webhook Handler

from src.api import webhook_handler

@webhook_handler("hubspot.contact.created")
def handle_new_contact(event):
    workflow = SyncContactsWorkflow()
    workflow.run(event)

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⚙️ Configuration

# config.yaml
retry:
  max_attempts: 5
  base_delay: 1  # seconds
  max_delay: 60
  exponential_base: 2

rate_limiting:
  default_rpm: 100
  per_integration:
    hubspot: 150
    salesforce: 100
    stripe: 200

monitoring:
  log_level: INFO
  metrics_enabled: true
  alert_on_failure: true

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🔄 Retry Policies

# Built-in retry strategies
RETRY_POLICIES = {
    "aggressive": RetryPolicy(max_attempts=10, base_delay=0.5),
    "standard": RetryPolicy(max_attempts=5, base_delay=1),
    "conservative": RetryPolicy(max_attempts=3, base_delay=5),
    "no_retry": RetryPolicy(max_attempts=1),
}

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📊 Monitoring Dashboard

┌─────────────────────────────────────────────────────────────┐
│  API Integration Framework - Status Dashboard               │
├─────────────────────────────────────────────────────────────┤
│  Webhooks Received (24h):  12,847                          │
│  Workflows Executed:       11,923                          │
│  Success Rate:             99.7%                           │
│  Avg Response Time:        234ms                           │
│  Failed (Retrying):        12                              │
│  Dead Letter Queue:        3                               │
└─────────────────────────────────────────────────────────────┘

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🧪 Testing

# Run tests
pytest tests/ -v

# Run with coverage
pytest tests/ --cov=src --cov-report=html

# Run integration tests
pytest tests/integration/ -v --integration

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📈 Outcomes

• 99.9% reliability across all integrations
• Real-time data synchronization
• Zero data loss with idempotency
• 5-minute setup for new integrations

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📄 License

MIT License - see LICENSE for details.

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👤 Author

Daud Ashar

• GitHub: @daveedashar
• LinkedIn: /in/daudashar
• Email: daud-a@consultant.com