Free subscription observability tools
These tools run without an account. They do not require paid signup. Guides are labeled as guides.
Live check
Stripe commercial health check
Read-only Stripe commercial checks. Also available at /stripe-health-check.
Live check
RevenueCat commercial health check
Connect RevenueCat and run source-only commercial checks.
Local tool
Webhook response validator
Classify HTTP status, content-type, and body snippet in the browser. No upload or replay.
Local tool
Entitlement drift calculator
Compare expected versus observed plan, features, seats, and credits. No provider calls.
Local tool
Revenue exposure calculator
Integer minor units, separate currencies, no FX. Runs locally.
Guide / checklist
Subscription state-machine checklist
A deterministic guide and checklist by provider and symptom. Not a scanner.
Local tool
Webhook payload inspector
Browser-local JSON inspection with identifier redaction. Nothing is uploaded.
Local tool
Allowance snapshot compare
Compare purchased units with granted units from a CSV snapshot. Nothing is uploaded until you sign in.