API Gateway Hsts
You set up api gateway hsts by adding the Strict-Transport-Security header to your responses. This header forces browsers and clients to send all future requests over HTTPS. Teams often set this rule up across all routes to stop downgrade attacks. Still, broad role permissions on the platform still leave backend data open to misuse. How api gateway hsts works in your architecture HTTP Strict Transport Security tells a client to only use encrypted links. When a browser calls your endpoint over
API Gateway (Kong, Envoy): the complete guide
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You set up api gateway hsts by adding the Strict-Transport-Security header to your responses. This header forces browsers and clients to send all future requests over HTTPS. Teams often set this rule up across all routes to stop downgrade attacks. Still, broad role permissions on the platform still leave backend data open to misuse.
How api gateway hsts works in your architecture
HTTP Strict Transport Security tells a client to only use encrypted links. When a browser calls your endpoint over HTTPS, the response includes a strict header. That header contains a timer value that sets how long the rule lasts. Until that timer runs out, the client refuses to use plain HTTP.
To build this workflow, engineers update response mappings at the edge routing tier. You can add the header at the stage level or on each route. Some teams pass the header straight from the backend app instead. Edge response rules work best because they cover error messages and blocked requests too.
You also need to redirect plain HTTP requests to HTTPS ports first. A client ignores the strict header if it arrives over an unencrypted link. Once the client reads the header over TLS, it locks in the HTTPS rule. You can also extend this rule to cover all subdomains under your main domain.
Why edge headers alone leave operational gaps
Adding transport headers solves a major network problem for public web apps. It blocks attackers on public networks from stripping encryption off your client traffic. It also stops users from clicking broken links that point to plain HTTP endpoints. Every modern compliance standard requires this basic transport control for web services.
Still, transport encryption only protects data while it moves across the network wire. Once the request passes the edge tier, internal services and users take over. Native cloud roles decide who can log in or deploy a route change. They do not check what individual queries or commands do during a live session.
An engineer with broad role permissions might run a wide query against production tables. A backend app with a shared key can pull thousands of customer records at once. Transport headers do not inspect the payload or rewrite sensitive fields like emails. Teams still need fine controls over what happens inside each active session.
API Gateway (Kong, Envoy): architecture patterns and best practices
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Managing subdomain rules and browser preload lists
Before you turn on strict transport rules everywhere, check every active subdomain first. When you include the subdomain flag, every internal tool on that domain must use HTTPS. If an older staging app still uses plain HTTP, browsers will block it right away. Teams often start with a short timer value to test for broken apps.
Once your team confirms that all apps work over TLS, you can raise the timer. Many teams also submit their main domain to the browser preload list. Browsers keep this built-in list to force HTTPS before the very first request happens. Removing a domain from the preload list takes months, so test your setup well.
Pair your transport rules with strict data handling on the backend systems. When engineers query databases to fix API bugs, masking should rewrite card numbers and phone numbers in results. Strong edge encryption works best when paired with tight controls on internal database queries.
Check database and API queries on the wire
Identity tools, roles, and network rules decide who opens a session. Setup alone cannot check what each query does or mask sensitive values in a response once a session starts. When workflows touch Postgres, MySQL, SQL Server, MongoDB, ClickHouse, Kubernetes APIs, SSH, or internal HTTP APIs, hoop.dev runs beside those services as an open-source proxy, a sidecar for your Postgres or API. It inspects requests coming in and results going back on the wire.
Your login details and client tools stay as they are while hoop.dev guardrails refuse bad deletes or drops before they run. On responses, hoop.dev data masking rewrites matched sensitive values in memory. Furthermore, hoop.dev holds SOC 2 Type II, is MIT licensed, and writes every query and decision to an audit trail that generates evidence for HIPAA, GDPR, and PCI DSS. See the source on GitHub.
Frequently asked questions
What happens if a client calls an HTTP endpoint after HSTS is active?
The client updates the request to HTTPS on its own before sending network data. If the server does not answer over HTTPS, the client drops the request right away.
Should I set the HSTS header at the edge tier or in the backend app?
Set the header at the edge routing tier whenever you can. This ensures that error responses generated by the routing tier still carry the security header.
Does HSTS protect internal database queries made by my backend service?
No, the header only tells web browsers and HTTP clients to use TLS links. It does not check, log, or mask the database queries that your backend runs.