SchemaGuardian probes the third-party APIs you depend on and emails you when a response schema silently drifts — type changes, removed fields, shape breaks — before production notices.
No credit card required · 3 probes free forever
Prebuilt probe templates for
How it works
Point SchemaGuardian at an endpoint you depend on — pick a prebuilt recipe or add your own URL and credentials.
Every run infers the response's type/shape and hashes it — never the values, never your data.
A change has to repeat 3 runs in a row before we email you. No flapping fields, no false-positive noise.
Why it's different
Shape-level diffing
A price changing from 999 to 1099 never alerts you. A field silently changing from a number to a string does. Value noise is filtered out by construction.
3-run stabilization
A drift candidate has to reappear on 3 consecutive probe runs before it becomes an alert. Transient API hiccups heal themselves and never reach your inbox.
AES-256-GCM at rest
Auth headers are encrypted before they touch the database and are never logged or returned by any query. We store schemas, never response bodies.
Set up a probe in 2 minutes. No credit card. 3 probes free forever.
Start watching freeDrift alerts by email · No Slack/webhooks yet