Customer.io SDK Patterns

Output

• A reusable SDK integration pattern with scoped configuration, schema validation, idempotency, observability, and error classification.
• A test-backed client boundary that keeps credentials and recipient data out of logs and source control.

Examples

Instantiate the client from an environment-specific secret reference, validate a synthetic event against the contract, attach a stable idempotency key, and assert the SDK call in a mocked unit test. For a development integration test, use a synthetic profile and record only result status/correlation ID; never log the client token or full event payload.

Overview

Production-ready patterns for customerio-node: type-safe wrappers with enum-constrained events, retry with exponential backoff, event batching for high-volume scenarios, and singleton lifecycle management.

Prerequisites

• customerio-node installed
• TypeScript project (recommended for type-safe patterns)
• Understanding of your event taxonomy