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Quick-reference articles on carrier integration concepts, patterns, and standards.

Idempotency

A property of operations where performing them multiple times produces the same result as performing them once.

Retry Strategies

Patterns for automatically retrying failed carrier API requests without causing harm.

HTTP Methods

Understanding safe, idempotent, and unsafe HTTP methods in the context of carrier APIs.

RFC 9457 Problem Details

A standard format for machine-readable error responses in HTTP APIs.

SOAP Envelope

The XML wrapper structure for all SOAP messages.

SOAP Fault

The standard error response format in SOAP web services.

WSDL

Web Services Description Language — the contract definition for SOAP services.

XML Namespaces

How XML namespaces prevent element name collisions in SOAP messages.

Correlation IDs

Unique identifiers that trace a request through distributed systems.

Circuit Breaker Pattern

A resilience pattern that prevents cascading failures when a carrier API is down.

REST API Basics

Foundational REST concepts as they apply to carrier integrations.

Error Handling Patterns

Strategies for classifying and handling carrier API errors.

XSD (XML Schema Definition)

The type system for SOAP messages — defines the shape of request and response data.

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