JSONShelf

A fast, deterministic JSON utility belt that runs entirely without LLMs. Exposes four core operations: repair malformed JSON with optional schema conformance, validate against schemas with structured error output, generate valid examples from schemas, and soft-cast values to match schema types. All operations complete in under 10ms and cost half a cent per call on a prepaid credit model. New keys come with 100 free credits. Reach for this when your agent needs to clean up broken JSON from APIs or LLM outputs, validate structured data without burning tokens, or generate test fixtures from schemas. The deterministic approach means identical inputs always produce identical outputs, no probability involved.