API Contract — Advanced Patterns

For Kafka/NATS/SQS event interfaces and multi-consumer contract validation with Pact. For the core REST/OpenAPI workflow (steps 1-5), see api-contract first.

When to Use

• Adding Kafka, NATS, SNS/SQS, or WebSocket interfaces (AsyncAPI)
• Multiple services consume the same API and need independent contract verification (Pact)
• Setting up can-i-deploy gates in CI

Step 6: AsyncAPI for Event-Driven APIs

For Kafka, NATS, SNS/SQS, and WebSocket interfaces, use AsyncAPI 3.0 instead of OpenAPI.