API Keys - MailRambo

Key name

Name it after where it will be used so you can revoke it safely later. Test keys (mr_test_) never use credits: simulated full checks use fixtures such as deliverable@ and disposable@; mode=fast runs real fast checks with either key type. Details.

Name	Key	Created	Last used	Status	Action

Quickstart

curl -X POST https://www.mailrambo.com/v1/verify \
  -H "Authorization: Bearer mr_live_..." \
  -H "Content-Type: application/json" \
  -d '{"email": "jane@acme.com"}'

# Signup forms: free, <1s (syntax, typos, MX, disposable)
curl -X POST "https://www.mailrambo.com/v1/verify?mode=fast" \
  -H "Authorization: Bearer mr_live_..." \
  -H "Content-Type: application/json" \
  -d '{"email": "jane@gmial.com"}'

Returns {"email", "deliverable", "reason", "credits_remaining"}. A full check costs one credit, shared with your dashboard balance; mode=fast and repeats of the same address within 24 hours are free. See the full API reference.

Using Better Auth? Set a dedicated server-only MAILRAMBO_API_KEY and follow the plugin setup guide. Do not expose this key in a browser environment variable.