Single source
The governed API layer.
Single source, enforced everywhere. Versioned APIs roll each change out deliberately, let every consumer upgrade on its own schedule, and keep a clean rollback path for every release.
Centralize your business logic in one governed backend.
Define eligibility, pricing, and every other business rule once. One change propagates everywhere, and every new build starts from the same rules.
Definition
What is a centralized business logic layer?
A centralized business logic layer is one backend that holds the rules your business runs on, such as eligibility, pricing and permissions, and serves them to every app, integration and AI agent through versioned APIs. Each consumer calls the layer instead of re-implementing the rules, so a rule changed once changes everywhere.
- The rules
- Eligibility, pricing, permissions and every other rule, written once as typed TypeScript with the Xano SDK.
- The contract
- Versioned APIs, so each consumer upgrades on its own schedule and every release keeps a clean rollback path.
- The consumers
- Web and mobile apps, partner integrations, and the AI agents that call the layer instead of re-inventing it.
The rules your business runs on, laid once
One source of truth for every business rule.
Every consumer and every agent runs on the same track, so a rule changed in one place changes everywhere.
Standing context
What agents call instead of re-inventing.
An agent building a new tool calls the governed API. Your rules become the standing context every build inherits.
Secure integrations Where the rules live
Rules in your repo, contracts in your types.
Write the backend in TypeScript with the Xano SDK, and the rules live where your code does: reviewed, versioned, and shipped through a release.
Rules as typed TypeScript
With the Xano SDK, tables, endpoints, functions and middleware are typed TypeScript in your repo. Version it, review it in PRs, diff it, roll it back.
@xano/sdk One contract for every consumer
A query def is also the contract your frontend imports. Rename a column and every consumer breaks at compile time: a compile error, not a 404.
routes.gen.ts Rules your agents read first
knowledge() keeps the standing instructions your workspace’s agents follow as real .md files, reviewed in a diff and versioned with the code they describe.
knowledge() Questions
Centralized business logic, answered
What is a centralized business logic layer?
It is one backend that holds your business rules, such as eligibility and pricing, and exposes them to every consumer through versioned APIs. Apps, integrations and AI agents call it instead of copying the rules, so there is one source of truth and a change made in one place applies everywhere.
Why centralize business logic?
Because rules copied into every app drift apart. When eligibility or pricing lives in one governed layer, one change propagates everywhere, every new build starts from the same rules, and you can see and review the rules your business actually runs on instead of hunting for them across codebases.
How does Xano centralize business logic?
Xano is the governed API layer. You write tables, endpoints, functions and middleware as typed TypeScript with the Xano SDK, version them in your repo and review them in pull requests. Versioned APIs roll each change out deliberately, and every release keeps a clean rollback path.
How do versioned APIs help with shared business rules?
They let you change a rule without breaking anyone. A web app and a mobile app can move to the new version while a partner integration stays on the old one until it is ready. Each consumer upgrades on its own schedule, and every release can be rolled back cleanly.
How do AI agents use centralized business logic?
An agent building a new tool calls the governed API instead of writing the rules again. In Xano, knowledge() keeps the standing instructions your workspace’s agents read first as real .md files, reviewed in a diff and versioned with the code, so every agent build inherits your rules.
Will my frontend know when a business rule changes?
Yes, at compile time. With the Xano SDK, a query definition is also the contract your frontend imports. Rename a column and every consumer breaks at compile time, so you get a compile error in review instead of a 404 in production.
AI builds software. Xano makes it trustworthy.
One platform to build, run and govern AI-built software.