VerifyForge
ML-scored email validation API with hybrid SMTP checks, bulk validation and non-expiring PAYG credits
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verifyforge.comAbout VerifyForge
VerifyForge is an email-validation API that runs a hybrid check — syntax, MX record lookup, SMTP verification and disposable-address detection — and layers machine-learning classification over the result to produce a reachability score and a predictive deliverability rating rather than a bare valid/invalid flag. The vendor quotes 99%+ accuracy and sub-two-second response times, with bulk validation of up to 100 addresses in a single request and CSV upload with deduplication for list cleaning. The API is a single GET with an API key header; SDKs cover Python, TypeScript and JavaScript, and integrations reach HubSpot, Mailchimp, ActiveCampaign and 50+ other platforms. Results are returned in full detail — MX records, SMTP analysis and the reasoning behind the verdict — rather than summarised, which matters if you need to defend a suppression decision. Smart caching cuts repeat cost. Signup gives 250 free credits with no card and takes about ten seconds. The pay-as-you-go option is the one worth noting for anyone doing occasional list cleaning: credits never expire and there is no subscription attached. Smart caching is applied automatically to reduce repeat cost on addresses already checked, and the vendor publishes a public playground and full documentation so the response shape can be inspected before integration. Signup takes about ten seconds and issues an API key immediately, with the 250 free credits usable against the live endpoint rather than a sandbox.
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