Opper AI

Opper AI is a hosted LLM gateway that sits between your application code and every major model provider. You authenticate once, set the `baseURL` to Opper’s compatibility endpoint, and the existing OpenAI SDK call you already wrote now routes to whichever model you name in the request — Claude, Gemini, GPT, DeepSeek, or dozens of others. No provider-specific SDKs, no per-provider API keys scattered across environment files. The vendor describes the setup as three steps: create an account, add credits or bring your own provider keys, make a call.

The differentiating feature for EU-based teams is that Opper runs inference on EU-hosted infrastructure — AWS EU, Azure EU, Evroc, Nebius, and others — and offers a single sub-processor data-processing agreement. For a regulated product that cannot route personal data through US infrastructure, that single DPA collapses weeks of procurement and legal review into one contract. The vendor states this is specifically designed for GDPR compliance, which is a constraint most US-first gateways treat as an afterthought.

The control plane layer — observability, intelligent routing across providers and regions, PII masking, content filtering, budget caps, and audit trails — is where Opper extends beyond a simple proxy. Teams running agents in production can capture every token, every session, and every model call without adding custom logging. Where Opper fits cleanly: inference routing, compliance governance, and model-switching for applications already built on the OpenAI SDK. Where it does not fit: stateful multi-agent orchestration, complex branching pipelines, and tool-calling architectures that need to live inside the gateway itself. Those requirements push teams toward a dedicated agent framework alongside the gateway.

The docs describe two integration paths — the OpenAI SDK compatibility endpoint for the fastest drop-in swap, and a native Python or TypeScript agent SDK for teams building tool-using agents with span tracing and multi-agent composition. An agent CLI lets you launch existing coding agents like Claude Code or Codex on Opper’s gateway, which means you can redirect an existing agent’s inference through EU infrastructure without forking the agent itself.