Email & SMS

Programmable email addressesUnlimited inboxes, custom domains, Gmail and Outlook.
Phone numbers & SMSReal numbers to receive texts and verification codes.

Application testing

End-to-end email & SMS testingTest signup, recovery and notification flows.
OTP & MFA testingCapture codes and complete authentication tests.
Load testingCheck message delivery as traffic grows.

Email quality

Device renderingPreview delivered email on real clients and devices.
Email AuditFind broken links, images and accessibility issues.
Inbox placement testingSee inbox, promotions and spam results.
Domain monitoringTrack authentication, DNS and sender health.

AI & automation

Email & SMS for AI agentsGive agents accounts with scoped API and MCP access.
AI data extractionTurn emails and attachments into structured data.
Email & SMS pipelinesRoute messages, attachments and replies into your systems.

QA & development teamsTest signup, authentication and application notifications.
Email marketing teamsPreview, audit and check campaign placement before sending.
Deliverability teamsInvestigate inbox placement and sender health.
Automation buildersProcess incoming messages, attachments and replies.

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Email & SMS

Programmable email addresses
Phone numbers & SMS

Application testing

End-to-end email & SMS testing
OTP & MFA testing
Load testing

Email quality

Device rendering
Email Audit
Inbox placement testing
Domain monitoring

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Email & SMS for AI agents
AI data extraction
Email & SMS pipelines

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Whatsapp API guides and tutorials

2 practical MailSlurp resources

Posts

WhatsApp Business API rollout guide for product and operations teams

Plan and implement WhatsApp Business API workflows with template governance, webhook reliability, and fallback channel architecture.

Read more technical

WhatsApp API Evaluation Guide for Messaging Teams

Evaluate WhatsApp API options for business messaging workflows, verification journeys, and multi-channel communication architecture.

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SMTP Deliverability Email Testing Testing Email Inbox Placement Dns Automation JavaScript Email Parser Device Previews Email Deliverability Email API QA SMS Transactional Email DMARC Campaign Testing API Marketing Email Authentication Integrations Campaign QA Java

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The complete email and SMS toolkit.

Develop and test real messaging flows, preview emails on real devices, protect deliverability, and connect AI agents—all from one platform.

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Email & SMS

Programmable email addresses Phone numbers & SMS

Application testing

End-to-end email & SMS testing OTP & MFA testing Load testing

Email quality

Device rendering Email Audit Inbox placement testing Domain monitoring

AI & automation

Email & SMS for AI agents AI data extraction Email & SMS pipelines

Resources

Documentation API reference SDK libraries Integrations Examples Guides Videos Browse all free tools

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