JSON Guardian
Stop AI Outputs From Breaking Your App
Validate, repair, and enforce JSON schemas on LLM outputs.
Sub-10ms response times. 99.8% uptime. Enterprise-grade.
7-day money-back guarantee on all paid plans
The Problem We Solve
Without JSON Guardian
- AI returns string instead of JSON object
- Missing required fields break your pipeline
- Malformed JSON crashes production
- Manual error handling eats dev time
- Unpredictable LLM outputs cause outages
With JSON Guardian
- Auto-repair common syntax errors
- Enforce schemas with smart type coercion
- Extract JSON from LLM prose/markdown
- Complete streaming JSON in real-time
- Batch process 100 items at once
- Validate in under 10 milliseconds
Dead Simple Integration
One API call. Any language. Sub-10ms response.
// Validate LLM output against your schema
const response = await fetch('https://api.jsonguardian.com/api/v1/validate', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'X-API-Key': 'your-api-key'
},
body: JSON.stringify({
schema: { type: 'object', required: ['name'] },
data: llmOutput
})
});
const { valid, parsed_data, errors } = await response.json();Check JSON against a schema
Works with JavaScript, Python, Go, Rust, PHP, Ruby, and any language with HTTP.
Why Choose JSON Guardian?
Blazing Fast
Written in Rust. Sub-10ms latency. Handles 3,000+ requests per second.
Smart Repairs
Automatically fixes trailing commas, missing brackets, unquoted keys, and more.
Secure & Private
We don't log or store your JSON data. Processed in-memory and discarded.
Cost Effective
No LLM calls means pennies per million validations. Save 95%+ vs other solutions.
Real-Time Metrics
Track usage, monitor performance, and get alerts via our dashboard.
Global Edge
Deployed worldwide for low-latency responses wherever your users are.
Simple, Transparent Pricing
Free
- 10,000 requests/month
- All core features
- Email support
- No credit card required
- Community support
All prices in USD. Cancel anytime. 7-day money-back guarantee. Upgrade from Dashboard → Billing after signup.
Frequently Asked Questions
Ready to Stop AI From Breaking Your App?
Join developers building reliable AI applications with JSON Guardian.
Questions? Email us at support@jsonguardian.com