Topic
API Key Authentication Best Practices
13 posts on api key authentication best practices — part of api integration on the n4n AI blog.
Setting per-key rate limits and spend caps
A practical guide to implementing per-key rate limits spend caps api controls for LLM gateways with runnable code and verification.
Environment variables vs secret managers for API keys
Head-to-head comparison of environment variables vs secret managers for API keys across capabilities, cost, latency, ergonomics, ecosystem, and limits for engineers.
Common API key authentication mistakes in production apps
A practical guide to avoiding api key authentication mistakes production teams make, from hardcoded secrets to missing rotation and fallback handling.
Client-side vs server-side API key handling for LLM apps
Compare client-side vs server-side api key handling for LLM apps across security, cost, latency, and ergonomics, with a verdict per use case.
Auditing API key usage for security and cost control
Learn how to implement API key auditing for security and cost control with practical logging, metering, and anomaly detection steps for LLM gateways.
Why you should never hardcode LLM API keys
Practical guide to eliminating hardcoded LLM API keys from your stack: env vars, secrets managers, proxy patterns, rotation, and audit tactics.
LLM API key authentication: best practices for 2026
A practical guide to LLM API key authentication best practices 2026: secure storage, scoped keys, gateway patterns, and rotation workflows.
How to store LLM API keys securely in production
Practical steps to store LLM API keys securely production: secret managers, IAM-scoped injection, rotation, log redaction, and gateway consolidation.
How n4n.ai authenticates API requests with Bearer tokens
Step-by-step guide to implementing n4n.ai bearer token API authentication in your LLM client, with runnable code for headers, errors, rotation, and verification.
Bearer token authentication for LLM APIs explained
Bearer token authentication for LLM APIs is a stateless HTTP auth scheme using opaque tokens. Learn how it works, why it matters, and common pitfalls.
API key scoping: limiting what each key can access
Learn how to implement api key scoping limit access with step-by-step key generation, enforcement middleware, and verification tests for production LLM apps.
API key permissions: read-only vs full-access scopes
A practical guide to designing api key permissions read-only full-access scopes for LLM gateways and APIs, with code and tradeoffs.
API key authentication vs OAuth2 for LLM platforms
Practical comparison of api key auth vs oauth2 llm platforms across capabilities, latency, cost, ergonomics, limits, with a use-case verdict.
More topics in api integration
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- Structured Outputs & JSON Mode19
- cURL LLM API Cookbook15
- Integrating GPT-5, Claude Opus 4.8, Gemini 3, Llama 4 & More via One API15
- Next.js AI Chat Integration (App Router + Vercel AI SDK)15
- FastAPI LLM Backend Integration14
- Go net/http LLM API Client14
- LangChain + OpenAI-Compatible Gateway Integration14
- Node.js OpenAI-Compatible SDK Integration14
- Python + OpenAI-Compatible SDK Integration14
- Rate Limits, Retries & Backoff Strategies14
- React Streaming Chat UI Patterns14