APIs Designed Around Your System's Architecture
No shared code between clients, every API is written from your system's own structure and rules
Middleware
GET 200
Host
api.opensv.app
Request
api/send
Duration
215ms
Event
request.validated
Function
POST 200
Host
api.opensv.app
Request
v1/webhooks/stripe
Duration
184ms
Event
checkout.session.completed
The foundation behind every build
Security
Built at the edge of every application
External systems should never be treated as an extension of the application, and the boundary between them should remain clear throughout the request lifecycle.
Authentication
Every request proves who it's coming from before the system responds to it.
Input validation
Every payload is checked against strict rules before it reaches your logic, not after.
Rate limiting
Requests are capped per client, so one bad actor can't take the system down for everyone else.
Encrypted in transit
Every request and response is encrypted end to end, so nothing sent through the API is ever exposed in the open.
Error handling
Failures return only what's needed to debug, nothing that exposes internals to whoever's asking.
Request logging
Every call is recorded, so there's always a trail of what happened, when, and from where.
Express.js + TypeScript
A standalone backend, decoupled from the frontend, with full control over middleware, routing, and deployment, well suited for long-running processes or serving multiple clients.
Next.js API routes
Lives in the same codebase as the frontend, sharing types directly, and deploys zero-config to Vercel with fluid compute included, best suited when the API only serves that one app.
Frequently asked questions
01
What kind of authentication does the API use?
Depends on the use case, session-based, token-based, or API keys. The method is chosen based on how the API is consumed, not applied as a default.
02
What happens when a client hits the rate limit?
Requests beyond the limit are rejected with a clear response, not silently dropped. Limits are set per client, so one integration hitting its ceiling doesn't affect anyone else calling the same API.
03
Can this integrate with a backend we already have?
Yes. The API is built around your system's existing structure and rules, not a generic template that assumes a blank slate.
04
Do I need to choose between Express and Next.js API routes?
No. The right approach depends on whether the API needs to stand alone or lives inside one application. That decision is made based on your requirements, not asked of you upfront.
05
What happens when the API needs to change later?
Breaking changes are versioned, not pushed silently into what's already running. Existing integrations keep working while new ones move to the updated version.
06
Is the API documented, or do we have to figure it out ourselves?
Documented. Endpoints, auth, and expected responses are written down and kept current, not left for you to reverse-engineer from the code.
07
Who owns the API once the project is done?
You do. The codebase, documentation, and infrastructure belong to you, with no dependency on us to keep it running.
08
Why is OpenSV selective about the projects it takes on?
Being selective protects the quality, integrity, and reputation of every product built, including yours. Every project accepted reflects what the studio stands for, so certain work gets declined, not out of judgment, but because building with integrity requires knowing where the line is. Those boundaries are not directed at clients, if your project is here, it belongs here.
09
What kind of projects will OpenSV not build?
Anything that operates outside applicable law, exploits or deceives users, violates public decency, or works against legitimate government structures and institutions. This includes unlicensed platforms, scam infrastructure, predatory systems, explicit content services, and tools built for evasion or disinformation.
10
What if a project doesn't clearly violate any of these, but still feels off?
Beyond legal and normative grounds, OpenSV reserves the right to decline any project that conflicts with its values as a studio, even in a gray area. If something feels wrong, it will not be built, regardless of how it's framed.
11
What if I'm not sure whether my project fits?
Reach out. A conversation is always better than leaving you guessing.