Common API Auth Mistakes in Serverless Systems

The short answer: The most common mistakes are route sprawl, drifting environment config, forwarding too much identity data, and assuming the gateway removes downstream authorization work.

When to read this

• You are reviewing an auth rollout plan.
• You want a lightweight pre-launch checklist.
• You need a support-friendly summary of avoidable failures.

What matters in practice

• Keep route auth rules explicit.
• Forward only the identity fields your downstream actually needs.
• Document environment-specific identity settings like they are code.

Concrete example

        {
        "authorizer": {
          "type": "jwt",
          "secret": "$secret.JWT_SECRET",
          "algorithm": "HS256",
          "issuer": "https://issuer.example.com",
          "audience": "api-audience"
        },
        "paths": [
          { "method": "GET", "path": "/health", "response": { "status": "ok" } },
          {
            "method": "GET",
            "path": "/private/orders",
            "auth": true,
            "integration": { "type": "http_proxy", "server": "orders" }
          }
        ]
      }

The example above is intentionally small because the best gateway configs stay readable. Add only the route, auth, and mapping behavior you actually need.

How this maps to the current gateway

The current codebase already supports the behavior discussed here through its config schema, route matcher, and integration handlers. That is why this project is a good fit for reader-first examples: the docs and blog can point to real, implemented behavior instead of hypothetical gateway features.

What this product does not do

• This repo reduces repeated auth plumbing but cannot remove all security design decisions.
• Operational discipline still matters more than clever route configuration.

FAQ

What mistake costs the most time?

Environment drift between token issuer, audience, secrets, and callback URLs.

What mistake creates the most risk?

Treating verified identity as a substitute for downstream authorization decisions.

Related docs

• how to debug 401s in worker based apis
• public routes private routes and least privilege
• jwt common 401 errors

Last reviewed: March 6, 2026