REST APIs have OpenAPI. GraphQL has introspection. TypeScript packages have... nothing. You want to know what a package exports? Read the source. Grep through node_modules. Hope the docs are current. This seemed like an obvious gap, so I built it.

openpkg extracts the complete public API surface from any TypeScript package. Functions, types, interfaces, classes. Parameters, return types, generics. JSON Schema out — ready for agents, tooling, whatever needs to understand your API.

A clean JSON schema describing every public export. Types resolved. Generics expanded. Ready for tooling. Feed it to an LLM. Generate documentation. Build type-safe wrappers.

Build AI-powered dev tools. Generate SDK wrappers. Create documentation sites. The whole point: agents need to understand your API surface in one pass. Not skim docs. Not grep source. Just structured JSON they can reason about.

Point at any package. Local path or npm registry. One command, JSON Schema out. No config, no setup, just the API surface.