Gateway Best Practices Advanced

Operating a production LLM gateway requires attention to security, scalability, governance, and operational processes. These best practices ensure your gateway is reliable, secure, and well-governed.

Security

• Never expose provider API keys to application teams. The gateway manages all provider credentials centrally.
• Implement request validation: block requests with PII, enforce content policies, and sanitize inputs before forwarding to providers.
• Rotate provider API keys on a regular schedule. The gateway makes this transparent to all consumers.
• Enable TLS for all gateway connections and encrypt stored credentials with a secrets manager (Vault, AWS Secrets Manager).

Scalability

• Deploy the gateway as a horizontally scalable stateless service behind a load balancer.
• Use connection pooling for provider connections to reduce connection overhead and improve throughput.
• Implement request queuing for traffic bursts that exceed provider capacity, with fair queuing across teams.

Governance

• Establish an LLM governance policy: approved models, use case guidelines, data handling requirements, and compliance rules.
• Implement model approval workflows: new models must be reviewed and approved before being added to the gateway.
• Maintain an audit trail of all configuration changes: who changed what, when, and why.

Operational Excellence

• Document runbooks for common scenarios: provider outage, budget exceeded, key compromise, and performance degradation.
• Conduct regular capacity reviews: are you approaching provider rate limits? Do you need to negotiate higher limits?
• Test failover procedures regularly. Do not wait for a real outage to discover your failover does not work.
• Stay current with provider API changes, new models, and pricing updates to maintain optimal gateway configuration.