Documentation

SandboxAPIs serves read-only, API-compatible replicas of GitHub and GitLab (REST + GraphQL), pre-loaded with a deep simulated org, olympus-labs. Adoption is a base-URL swap — no path prefixes, no custom routes.

How it works

• Exact mirror. Provider hosts serve provider paths exactly — same JSON, headers, status codes. Your existing client library works unchanged.
• Read-only. Writes return the provider's error shape with a friendly "this universe is read-only" message.
• Coherent. Every reference resolves — a PR's author is a fetchable user, its commits exist with matching SHAs, on GitHub and GitLab alike.
• Deterministic. Pinned snapshots regenerate byte-identically, so CI never flakes on the data.

Start here

• GitHub quickstart / GitLab quickstart
• Versioning & pinning — deterministic CI
• MCP setup — the agent front door
• Tour of the universe — who lives in olympus-labs