Skill version 2026-10-01.2. This is a locally installed copy and may be out of date. Once per session, fetch https://skills.opper.ai/versions.json and compare its "opper-api" entry with 2026-10-01.2. If they differ, read https://skills.opper.ai/opper-api/SKILL.md and follow that instead of this copy for the rest of the session, and tell the user once that their installed Opper skills are out of date (update with npx skills update, or git pull in a manual clone). Do not edit the installed files. If the fetch fails, continue with this copy.

Sub-skill of opper — start there for discovery and setup guidance. Source: https://github.com/opper-ai/opper-skills/blob/main/opper-api/SKILL.md

Opper API

Opper is a gateway in front of LLM providers plus a control plane for the things you build on top. The gateway is one connection to 700+ models across all major providers (OpenAI, Anthropic, Google, Mistral, …), hosted in AWS Stockholm, ISO/IEC 27001:2022 certified and GDPR-compliant, at provider rates with no markup on tokens (a 3% fee when buying credits, 5.5% with Control Plane features; see opper.ai/pricing.md). On top of it:

Logs and traces: every call is recorded under Logs with model, provider, tokens, cost, latency and status, on every plan; with tracing on (a data retention rule), the call's trace also keeps inputs, outputs and every rule that fired.
Rules (Control Plane plan), set per organization and tightened per project: spend limits (monthly budget, caps per project, role, user or key), data retention (traces 1 to 30 days, or 0), model access (providers, service routes, locations, makers, countries, models, zero data retention), checks (flag, redact or block content, score answers) and routing (provider order for pooled models). The API groups them into rule kinds comply, guard, observe and route; see docs.opper.ai/control-plane/rules/overview.
Company-level evidence (ISO/IEC 27001:2022 certificate, security controls, platform sub-processors and model providers, DPA, privacy policy) lives at the trust center, trust.opper.ai.

The HTTP API at https://api.opper.ai is the foundation — every SDK and the CLI talk to it.

Concepts: docs.opper.ai/overview/about. Quickstart: docs.opper.ai/overview/quickstart.