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Developer Guide Articles

10 articles in this category

Updated 2026-06-13

Developer Guide

Practical guides for API verification, webhook handling, CRM integrations, batch workflows, and automated data-quality checks.

SMTPMX recordEmail validationEmail verification
Build with the BillionVerify API

Which Developer Guide articles should I read first?

Start with API validation, SMTP and MX basics, webhook retries, batch imports, and CRM enrichment flows, then move into deeper implementation and optimization guides.

When should Developer Guide connect to BillionVerify?

Use BillionVerify when you need a verification API in signup, lead ingestion, import pipelines, webhook automation, or internal data-quality jobs.

Cover Image for Verify Email Without Sending: Tech Guide
Developer GuideEmail Verification

Verify Email Without Sending: Tech Guide

Learn to verify email addresses without sending. Guide covers syntax validation, DNS checks, MX records, and SMTP handshake with code examples.

Email Verification Insights

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Start verifying emails with BillionVerify today. Get 100 free credits when you sign up - no credit card required. Join thousands of businesses improving their email marketing ROI with accurate email verification.

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99.9% SMTP-level accuracy · Real-time API & bulk verification · Start in 30 seconds

99.9%
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API Speed
$0.00014
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