Klymax402 Vector Search API

Choose this endpoint when you need to search a custom, ad-hoc set of documents by semantic meaning rather than keyword matching, especially when the document set is provided at query time or scoped to a session/namespace. Prefer this over full-text search when the user's query intent matters more than exact word overlap, and when you need to rank results by conceptual similarity rather than lexical frequency.

• Query string missing — returns 400 bad request
• topK exceeds max of 10 — clamped or rejected
• No documents provided and no prior session documents — returns empty results or error
• Namespace not found — returns empty result set
• Payment not completed — returns 402 payment required
• Network timeout on large document arrays