API integration connects software systems through application programming interfaces so they can exchange data, trigger actions, and participate in shared workflows.

API integrations allow applications to work together without requiring people to manually move information between systems.

What Is API Integration?

An API integration connects one application to another through a defined interface.

For example, a customer-service platform may connect to:

CRM
Scheduling system
E-commerce platform
Payment system
Inventory database
Support platform

The integration allows data or actions to move between them.

How API Integration Works

A typical API integration includes:

Authentication

The systems verify access.

Request

One system sends a request.

Processing

The receiving system performs an operation.

Response

The system returns data or a status.

Error Handling

The integration handles failed or invalid requests.

API Integration vs. REST API

A REST API is one type of interface.

API integration is the broader process of connecting systems using APIs.

An integration can use REST or another API architecture.

API Integration vs. Webhook

Webhook integrations are event-driven.

API integrations are often request-driven.

Many production systems use both.

For example:

API retrieves current availability.
Webhook sends a notification when a booking changes.

Common API Integration Use Cases

Customer Data

Retrieve customer profile information.

CRM

Create or update lead records.

Scheduling

Check availability and create appointments.

E-Commerce

Retrieve products, orders, and inventory.

Support

Create tickets or cases.

Payments

Check transaction status.

API Integrations and AI Agents

An AI Agent becomes more useful when it can interact with live systems.

Without integrations, the agent may only provide information.

With APIs, it can potentially:

Retrieve current data
Create records
Update systems
Complete actions
Trigger workflows

The exact actions should be controlled by permissions.

API Integration and Tool Calling

Tool Calling is often the model-facing layer.

The agent calls a tool such as:

check_availability

The tool then uses the external API.

This separates model reasoning from low-level integration logic.

API Integration and Grounding

APIs can provide current source information.

For example:

Current balance
Appointment availability
Product inventory
Account status

The returned information can be used to ground the AI response.

API Integration Security

Important controls include:

Authentication
Authorization
Least-privilege access
Encryption
Secret management
Logging
Rate limiting
Input validation

AI agents should only have access to actions required by the workflow.

API Integration Reliability

Production integrations should handle:

Timeouts
Rate limits
Invalid data
Temporary failures
Authentication expiry
Duplicate requests
Partial failures

The workflow should not assume every API request succeeds.

API Integration and Workflow Automation

APIs are central to Workflow Automation.

They allow software to move from understanding a request to performing an action.

This is especially important in AI agent systems.

API Integration in AskHandle

AskHandle can participate in broader software workflows through REST API, webhook-based patterns, and connected handoff destinations.

This allows customer conversations to interact with external systems instead of remaining isolated inside the messaging layer.