Your balance
Every new account starts with 100,000 verifications, or 10,000 emails found. Both come from the same balance:
When the balance runs out, calls return
402 OUT_OF_CREDITS. Check what’s left with GET /api/v1/credits.
Rate limits
New accounts get these limits:
Going over returns
429 with RATE_LIMIT_EXCEEDED, or CONCURRENT_LIMIT_EXCEEDED for too many requests at once. GET /api/v1/rate-limit shows your limits and current usage.
Timeouts
Some calls take several seconds. Use an HTTP timeout of at least 60 seconds, and 120 seconds for/generic-emails, which checks four addresses.