Choose the access path before integration.

Native cloud APIs and a unified API solve different problems. Confirm model capabilities, account ownership and business dependencies before permissions, configuration, testing and handover.

Discuss your scope

One interface does not make capabilities identical

Decision	Native cloud API	Unified API layer
Best fit	Native authentication, specific model features or provider console records matter.	Approved channels need common request handling, routing and application errors.
Differences remain	Provider model IDs, versions, regions, quotas and response formats.	Map tools, streaming, modalities and caching individually; do not assume compatibility.
Accounts and billing	Identify the cloud account owner, authorized roles and billing access.	The layer does not change upstream ownership, quotas or billing; record each source.

Four checkpoints for a request

Business app
Identity and policy
Agreed cloud platform
Output and usage log

Reference request path. Add a unified layer only when required. Authorized roles retain keys; never embed them in client code or handover documents.

Test the integration against real tasks

Successful request

Verify model ID, region, output fields and usage, then confirm the app can consume the result.

Failure and limits

Test denied access, throttling, timeouts and retry limits; account for duplicates and extra cost.

Features and fallback

Test streaming, tools and modalities needed by the task. Authorize and test fallback models separately; never silently switch sources.

Reviewable deliverables

Account and access matrix, environment/model configuration, feature mapping, test records, error and fallback rules, usage checks and handover owners.

Scope boundary

Integration does not imply identical model or platform capabilities. Procurement, access approval and production launch are separate decisions; technical success does not replace business review.

Decide the next step