The ListCheckup REST API: verify one email address or a whole list from your own code, with an API key. Endpoints, fields, errors and webhooks.
Check one address, or a list of any size, from your own code. Everything is JSON, every field is snake_case , and the base is https://listcheckup.com . Every request carries an API key, created in your dashboard . GET /v1/me answers with the account the key belongs to and its balance, which makes it the quickest way to confirm a key works: Without a key, or with one that has been revoked or has expired, every endpoint answers 401 and says which of those it was — a revoked key and a typo call for different fixes.
Pricing & access
ListCheckup has a free tier, with paid plans unlocking more. Check listcheckup.com for current plans.
Frequently asked questions
What is ListCheckup?
ListCheckup is aPI. The ListCheckup REST API: verify one email address or a whole list from your own code, with an API key. Endpoints, fields, errors and webhooks.
Is ListCheckup free?
ListCheckup has a free tier, with paid plans unlocking more.
What are the best ListCheckup alternatives?
People comparing ListCheckup also look at Bot403, Cypher eSIM, Reuily, Willder. See all options in the Developer Tools category on SiftFox.
Work on ListCheckup?
Claim this profile for free - instant with a work email at listcheckup.com.
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