The paid scan runs the full L402 flow against your API and tells you which checks fail, why, and how to fix each one.
Fully automated · Results in under a minute · Capped spend limit
10,000+
L402 endpoints scanned
API teams
use the Launch Checker before going live
Lightning-native
built for API developers, Nostr apps & Lightning wallets
Trusted by developers building on the Lightning Network
"The preflight check caught three issues we'd missed before launch. Paid for itself in the first week."
"Finally a tool that tells you exactly what's broken instead of just saying 'not L402 compliant'."
Check any API endpoint for Lightning Network 402 support in seconds. No setup, no code changes, no commitments.
| Feature | Free Preflight | Paid Full Scan |
|---|---|---|
| Reachability check | ✓ | ✓ |
| Method validation | ✓ | ✓ |
| Challenge detection | ✓ | ✓ |
| Invoice parsing | — | ✓ |
| Payment verification | — | ✓ |
| Full transcript capture | — | ✓ |
| Prioritized fix list | — | ✓ |