Provider API keys are infrastructure credentials. When every application stores a raw provider secret, credential rotation, ownership and blast radius become harder to control. A gateway can separate application identity from provider identity: applications receive scoped gateway credentials while provider secrets remain inside the control plane.
Key takeaways
- Do not use one shared provider key across unrelated production workloads when you can scope access.
- Separate application credentials from provider credentials to simplify rotation and provider changes.
- Treat key creation, revocation and usage as auditable operational events.
The shared-key problem
A single provider key copied into many services creates unclear ownership. If the key leaks, the blast radius spans every workload. If it needs rotation, every application becomes part of the migration. Provider-side usage may also be difficult to attribute cleanly to internal products.
The problem gets worse as teams add providers and environments.
Use a two-layer credential model
Applications authenticate to the AI gateway with a scoped credential. The gateway resolves the organization or workload and uses the appropriate provider connection internally. The application never needs the raw provider secret.
This model centralizes rotation and makes provider changes possible without redeploying every client simply to distribute a new secret.
Scope credentials to the smallest useful boundary
Create separate credentials for applications, environments or integrations where ownership differs. A staging workload should not automatically share the same operational identity as production.
Scope also improves telemetry: a request credential can become one more trustworthy attribution signal alongside application and agent metadata.
Rotation and revocation should be normal operations
Design for keys to expire, rotate or be revoked without a crisis. Keep the creation time, owner, last-used signal and status visible. When possible, support overlapping rotation windows so a new credential can be deployed before the old one is revoked.
Provider secrets should be encrypted at rest and never returned casually through product interfaces after initial configuration.
Audit access without logging secrets
Audit who created, rotated or revoked credentials and which workload used a gateway key. Do not log raw secrets or full authorization headers.
Security evidence should explain access and change history while keeping the credential itself out of logs, analytics and support tooling.
FAQ
Common questions
Should every AI application have its own API key?
Separate scoped credentials are useful when applications or environments have different owners, permissions or audit requirements. The provider secret can remain centralized behind the gateway.
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