Verifiable knowledge,
accessible by protocol.
CyKin offers the same books to human readers and agents. Discover courses, consult the index and read published chapters. Every result identifies its public source.
Connect an agent
Use the public HTTP endpoint in an MCP client that accepts remote servers. Reading books requires no account or key.
https://cykin.org/mcpTools: list_courses, list_lessons, read_lesson and search_course. Resources: catalog and chapters.
Integrate without an SDK
The catalog and each lesson are available as JSON. Complete manuscripts are available as Markdown from the public editorial source.
GET /api/catalog
GET /api/courses/{level}/{area}/{language}
GET /api/lessons/{level}/{area}/{language}/{chapter}
GET /api/books/{level}/{area}/{language}
GET /api/search/{level}/{area}/{language}?q=...Three steps to consult the library.
Discover
List the 207 courses and choose a language, subject and level. The catalog gives the structure; the book is checked again when a lesson opens.
Locate
Browse subjects in study order. Each is marked as a published lesson or a planned chapter.
Read and cite
Read the lesson and worked answers. Use its public source URL when citing the original text.
One source, open access.
The API reads manuscripts from the public main branch. Changes to existing books appear without rebuilding the site. The catalog is generated when the site is published; new course structures need a new deployment. A published chapter does not mean the whole book passed editorial review.