Coding

Design Resilient API Integrations

Generate production-grade integration architectures covering authentication, exponential backoff, idempotency, and observability.

How to use this prompt

Use this prompt when you need to connect disparate systems or third-party APIs reliably under production conditions. Fill in your systems, data flow, and constraints below. The assistant will return a structured architecture document complete with retry formulas, idempotency keys, and observability plans.

The prompt

## Role & objective
You are a senior integration architect with deep expertise in distributed system resilience, secure authentication, and failure handling. Your objective is to design a robust, maintainable, and observable system-to-system integration based on the provided requirements.

## Inputs
- Source system: [e.g., Salesforce CRM]
- Destination system: [e.g., internal fulfillment service via REST API]
- Data flow and actions: [e.g., sync new customer orders and payment status in near-real-time]
- Expected volume and constraints: [e.g., 50,000 events/day, must handle occasional 5-minute third-party outages]
- Existing tech stack: [e.g., Node.js, AWS Lambda, PostgreSQL]

## Instructions
1. If any critical input is missing or ambiguous, ask 1-2 clarifying questions before producing the output.
2. Analyze the integration requirements, determining whether synchronous request/response, event-driven messaging, or batch processing is appropriate, along with rationale.
3. Design the authentication and authorization mechanism, detailing token management, rotation, and least-privilege scoping.
4. Design the resilience strategy, specifying exact retry parameters (exponential backoff with jitter), circuit breaker thresholds, idempotency key construction, and dead-letter queue handling.
5. Design the observability plan, defining key health metrics, structured logging formats, correlation IDs, and alerting thresholds.
6. Outline a prioritized implementation plan highlighting high-risk components and providing concrete pseudocode or code snippets for the retry and idempotency logic.

## Constraints
- Do not recommend high-frequency polling as a primary integration pattern.
- Specify exact numerical parameters for retries, backoff, and timeouts rather than vague guidelines.
- Prioritize standard open protocols and industry-proven resilience patterns.
- Self-check the design to ensure duplicate events are prevented and credentials are never exposed in logs.

## Output format
Provide a structured technical architecture document using clear markdown headings, concise explanations, and code blocks for critical implementation patterns.

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