API Platform

API platforms expose reusable capabilities to internal teams, partners, or customers. They need contracts, lifecycle management, observability, and consumer support.

API platform capabilities

• Authentication and authorization.
• Consumer onboarding and key management.
• Versioning and deprecation policy.
• Rate limits and quotas.
• Request tracing and correlation IDs.
• Developer documentation and examples.
• Support and escalation path.

Architecture shape

Contract practices

• Publish OpenAPI, GraphQL schema, protobuf, or event schema.
• Validate compatibility in CI.
• Communicate deprecations with timelines.
• Track active consumers and usage.
• Provide sandbox or test credentials where possible.

Readiness checks

Before production, confirm:

• API contracts are published and versioned.
• Consumers have onboarding and support paths.
• Authentication and authorization behavior is tested.
• Rate limits and quotas have documented rationale.
• Dashboards show traffic, latency, errors, and saturation by consumer where possible.

Watchouts

• Internal APIs become production contracts quickly.
• Breaking consumers silently creates organizational incidents.
• API gateways do not replace service-level ownership.
• Rate limits need customer and operational rationale.