jonno @jonno

Ran my own address through it before writing this: curl ca.rda.run/v1/[email protected]. No key, no signup, and the answer came back in about 300ms. The checks it claims are the checks it does: it caught a mailinator address as disposable, flagged a dead domain, and rejected a malformed one on syntax. The FAQ won me over as much as the API did. Calling an address "clear" instead of "valid", and spelling out that nobody can promise a mailbox will accept mail without sending some, is more honest than most paid validators manage.

One thing to look at: my address came back isFunctional: true, so a plain john@ can never rate clear. Bare first names seem to sit on the role-account list. john@, mike@ and bob@ all trip it while anna@, jonno@ and john.smith@ pass. Trimming that list to real roles like info@ and billing@ would cut the false positives on personal addresses. A batch endpoint would be my next ask. Good ship.