Opper is one API in front of every major AI model, hosted in the EU. Drop in your existing OpenAI, Anthropic, or Google AI SDK, or use the JSON API for structured tasks. Either way you get observability, governance, and one sub-processor for every model.Documentation Index
Fetch the complete documentation index at: https://docs.opper.ai/llms.txt
Use this file to discover all available pages before exploring further.
Start here
Quickstart
Five minutes to your first call.
What is Opper?
The product tour: Gateway, Control Plane, and how they fit.
AI Gateway
One API, 300+ models, routing, and EU enforcement.
Security
Hosted in Stockholm. One sub-processor for every model. Store no logs at all if you need to.
Build
Drop-in SDKs
Use the OpenAI, Anthropic, or Google AI SDK you already have.
JSON API
Send a task, get a typed JSON object back. Great for parsing and extraction.
Realtime
Two-way voice over WebSocket. OpenAI, xAI, and Gemini behind one protocol.
Models
The full catalog. EU-hosted models marked.
Govern and improve
Control Plane
Five tools to govern, score, and improve every call.
Comply
Restrict providers, regions, retention, and budget at the gateway.
Observe
Score every response against criteria you write.
Concepts
Calls, spans, traces, scopes. The mental model that ties everything together.