What is the best email verification API with pay as you go pricing?
1Lookup verifies an email address for 1 credit, $0.00495 a check on the $99 Starter plan, which is $4.95 per 1,000. It is a monthly plan rather than a pay-as-you-go pack, and unused credits roll over for 3 months, while the pay-as-you-go packs we checked in October 2026 cost $7.60 to $19.50 per 1,000.
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These are the facts to weigh before you buy.
- One check returns deliverability, a fraud score and a risk level, and flags disposable and role addresses.
- The same credits check phone numbers and IP addresses, so one balance covers all three.
- Unused monthly credits roll over for 3 months, so a quiet month does not waste your balance.
- A single check is free with no account, and the 7-day free trial lets you run your own list before you pay.
Check one address now with our free email verifier.
To run it from your own software, see the email validation API.
To compare pay-as-you-go packs and plans, see our ranking of the 10 best email verification tools.
These are the next questions buyers ask.
- How much does a phone validation lookup cost with 1Lookup?
- Does 1Lookup have a free trial, and what do I get?
- What is the best phone number validation API for a small business?
See all the questions answered in the help section.