AI without a door
A model in a notebook, no auth, no limits. FastAPI becomes the door.
APIs & AI - FastAPI
FastAPI - APIs with bite.
Lean, typed APIs for integrations and AI orchestration. OpenAPI included - without a framework cathedral.
OpenAPI
Orchestration
RAG
Webhooks
When FastAPI fits
When you need a clear HTTP edge - in front of models, jobs or several clients.
Many clients
Shop, CRM, internal tool. One contract, versioning, error codes.
Webhooks & events
Clean up incoming events, sign them, pass them on.
PHP stays the core
You do not want to migrate - just a fast edge in front of it or beside it.
What we deliver in FastAPI
Contract, security, operations.
APIs
Pydantic models, OpenAPI, auth (token/OIDC), validation.
AI orchestration
RAG pipelines, prompt routing, fallbacks. See AI adoption.
Jobs behind the API
Long-running work in queues, status endpoints, webhooks back.
Integration
Bitrix24, Shopware, Symfony/Laravel - as clients, not as copies.
Approach: contract first
Before we wire up models, the API contract is in place. Clients should build against a schema, not against our mood.
- Define resources and auth
- OpenAPI as the source, not as an afterthought
- Pilot with limits, logs and a cost cap
- Handover: spec, runbook, staging
How a FastAPI edge takes shape
Spec, slice, hardening.
Contract
Endpoints, errors, auth. In writing.
Slice
One flow in staging against real data.
Harden
Rate limits, timeouts, observability, PII.
Operate
Deploy, metrics, optional maintenance.
What integrations rely on
APIs you can quote.
OpenAPI taken seriously
The spec does not lie. Breaking changes are real work, not just “some Wednesday”.
AI with brakes
Costs, timeouts, human in the loop - part of the design.
No shadow platform
FastAPI orchestrates, it does not replace your CRM.
Frequently asked questions
API questions, briefly.
FastAPI or Node.js?
Close to Python and AI: FastAPI. A JS team and a BFF in front of an SPA: often Node.js. Sometimes both, clearly separated.
Django or Flask?
Django when the admin or CMS lives in Python. We know Flask. For APIs plus AI, FastAPI is usually the shorter route.
Self-hosted LLM?
When data protection or costs call for it. Otherwise API models plus RAG.
How do you version?
URL or header, with visible deprecation. Clients get advance notice.
Auth?
Token, OIDC or m2m - depending on the client. No open endpoints “because it is internal”.
How do we start?
One contract plus one flow. A fixed scope after the kickoff.
More stacks
Related technologies we often use alongside.
An API with a contract?
Tell us the clients and the first flow - we outline the spec and the pilot.