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JSON Guardian

Schema enforcement API for LLM outputs — validate, repair & enforce JSON in <10ms.

Overview

Production SaaS that stops AI outputs from breaking apps. High-performance Rust API that validates JSON against schemas, repairs malformed JSON from LLMs, enforces type coercion, extracts JSON from prose, and completes partial/streaming JSON. Launched Feb 2026 with full dashboard, API key management, Stripe billing, and RapidAPI listing. Pricing: Free (10K req/mo), Starter ($9/mo, 100K req), Pro ($29/mo, 1M req).

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Features

Sub-10ms JSON validation, repair & enforcement
LLM prose extraction & partial JSON completion
Batch processing API for bulk operations
Dashboard with API key management & usage analytics
Stripe billing ($9/$29 tiers) + RapidAPI listing
Swagger UI docs + OpenAPI 3.0 spec

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