Third-Party Integration

Third-party integrations connect business workflows to external systems. They need contract ownership, failure behavior, security review, and clear support paths.

Integration inventory

Track:

• Vendor or partner owner.
• Internal business owner.
• Authentication method.
• Data exchanged and classification.
• Rate limits and quotas.
• Retry and timeout behavior.
• Support and escalation path.
• Contractual availability or notification commitments.

Architecture shape

Reliability practices

• Use explicit timeouts.
• Use queues when external availability should not block users.
• Make writes idempotent where possible.
• Monitor error rates, latency, quota usage, and backlog.
• Document degraded behavior when the third party is unavailable.

Readiness checks

Before production, confirm:

• Vendor support and escalation path are documented.
• Credentials, webhook secrets, and certificates have owners.
• Failure behavior is visible in dashboards and alerts.
• Retries and rate limits are configured intentionally.
• Contract or schema changes have a monitoring path.

Watchouts

• Vendor SLAs do not guarantee your user journey.
• API changes can break integrations without code changes on your side.
• Credentials and webhooks need rotation and ownership.
• Support paths should be tested before major launches.