Modern businesses use dozens of software tools that need to share data. APIs are the bridges that connect these tools, allowing information to flow automatically between your website, CRM, accounting software, and other systems.
Common API Use Cases
- Payment processing: Connect your website to Stripe, PayPal, or Square for secure transactions
- CRM integration: Send website leads directly to HubSpot, Salesforce, or your CRM
- Shipping calculation: Real-time rates from USPS, UPS, FedEx on your checkout page
- Inventory sync: Keep product availability accurate across website, marketplace, and POS
- Email marketing: Add customers to email lists, trigger sequences based on website actions
- Accounting: Sync invoices, payments, and expenses with QuickBooks or Xero
REST vs GraphQL
Two main API architectures:
- REST: The standard approach. Simple, well-documented, works with any programming language. Best for most business integrations.
- GraphQL: More flexible data querying. Best for complex applications that need specific data subsets. Overkill for most small business needs.
API Security
APIs handle sensitive data and must be secured:
- Authentication (API keys, OAuth tokens)
- Rate limiting (prevent abuse)
- Input validation (prevent injection attacks)
- HTTPS only (encrypted transmission)
- Logging and monitoring (detect suspicious activity)
Need custom API development? Check our custom development services or contact us.
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Tony Paris
Founder and Tech Wizard at AppWT Web & AI Solutions. With over 29 years of experience in web development, Tony helps businesses succeed online through custom websites, SEO, and AI integration.
Learn more about TonyFrequently Asked Questions
What is an API?
An API (Application Programming Interface) is a set of rules that lets different software systems communicate. When you check the weather on your phone, an API connects the weather app to the weather data server. For businesses, APIs connect your website to CRM, payment, shipping, and other systems.
When does a business need custom API development?
When off-the-shelf integrations (Zapier, built-in connectors) cannot handle your specific needs. Custom APIs are needed for proprietary systems, complex data transformations, high-volume data processing, or unique business logic.
How much does API development cost?
Simple API integration (connecting two systems): $1,997-$4,997. Custom API development (building new functionality): $4,997-$14,997. Complex multi-system integration: $9,997-$29,997. Costs depend on complexity, security requirements, and number of systems involved.
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