Email Verification & OTP API
SignalOps provides a developer-friendly Email Verification API for OTP delivery, verification emails, password resets, welcome emails, transactional messaging, and automated email workflows. Send reliable emails at scale with secure OTP generation and verification.
Transactional Email API Playground & SMTP Testing Demo
Send transactional emails, OTP verification emails, and realtime notifications using Voyant Email APIs.
Send Demo Email
API Response
Waiting...
Verify OTP Hash
Test bcrypt OTP verification locally in browser.
Example Payload
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Built for realtime transactional email delivery
Enterprise-ready APIs for OTP delivery, transactional messaging, email automation, notifications, and scalable communication systems.
Transactional Emails
Send OTPs, verification emails, password resets, invoices, alerts, and realtime transactional email workflows.
Email Automation
Trigger automated notification flows, onboarding emails, user engagement campaigns, and scheduled messaging systems.
Custom Templates
Build branded email templates with dynamic variables, buttons, multilingual support, and reusable layouts.
Create Payload
{
"accountId":"...",
"projectId":"...",
"apiKey":"...",
"emailData":{
"templateName":"email_verification",
"to":"[email protected]",
"fromType":"verify",
"templateData":{
"username":"John",
"otpLength":6,
"digitsOnly":true,
"expiryMinutes":10
}
}
}{
"accountId":"...",
"projectId":"...",
"apiKey":"...",
"emailData":{
"templateName":"welcome",
"to":"[email protected]",
"fromType":"updates",
"templateData":{
"appName":"Voyant",
"button":{
"text":"Get Started",
"url":"https://example.com"
}
}
}
}{
"accountId":"...",
"projectId":"...",
"apiKey":"...",
"emailData":{
"templateName":"custom",
"to":"[email protected]",
"fromType":"noreply",
"templateData":{
"greeting":"Hello",
"title":"Welcome",
"message":"Thanks for joining.",
"button":{
"text":"Dashboard",
"url":"https://example.com"
}
}
}
}Sign Request
signature=
HMAC_SHA256(
JSON.stringify(body),
API_SECRET
)
Headers:
Content-Type:application/json
x-signature:signatureSend Request
POST
HOST: api.signalopsapi.com
Legacy Host:
api.voyantnetworks.com
(Deprecated - will be removed in a future release)
Endpoints: /v1/email/sendOfficial SDKs & Libraries
Integrate Voyant APIs quickly using official SDKs for backend, frontend, mobile, and server-side applications.
Flutter
Mobile, desktop, and web SDK for Flutter applications across Android, iOS, Windows, macOS, Linux, and web.
View pub.dev Package →Python
Python SDK for automation, backend services, AI workflows, and scripts.
Coming SoonTutorials & Walkthroughs
Learn how to integrate APIs, configure SDKs, and build production-ready traffic systems with Voyant Networks.
Email API Platform
Build Scalable Email APIs
Learn OTP verification workflows, transactional email delivery, custom templates, realtime APIs, and scalable high-volume email infrastructure.
IP Intelligence API
Detect VPNs & Proxy Traffic
Integrate realtime fraud detection and traffic scoring APIs.
Text Analysis API
Detect Spam & Toxicity
Analyze sentiment, spam, phishing, and harmful content using AI.
NSFW Detection API
Detect Unsafe Content
Detect explicit, unsafe, and suggestive images using AI moderation.
Referral Rewards
Referral Program Explained
Learn referral tracking, reward flows, and partner attribution systems.
Connect with Voyant Networks
Reach out for integrations, partnerships, infrastructure support, and stay updated with product launches, demos, tutorials, SDK releases, and infrastructure updates.
Frequently Asked Questions
What is an Email Verification API?
An Email Verification API sends one-time passwords (OTPs) and verification emails to confirm user ownership of an email address during signup, login, password reset, and account recovery workflows.
Can I send OTP verification emails?
Yes. The API can generate secure OTP codes, send verification emails, return hashed OTP values, and help validate user email ownership securely.
Can I use my own email templates?
Yes. You can use built-in verification and welcome templates or create fully custom email templates with dynamic variables, buttons, branding, and personalized content.
What email workflows can I build?
The API supports email verification, OTP delivery, password reset emails, welcome emails, account notifications, transactional messaging, and automated email workflows.
Is OTP verification secure?
Yes. OTP values can be securely hashed using bcrypt before storage, allowing verification without storing plain-text OTP codes in your database.
Start Building With SignalOps APIs
Integrate IP intelligence, email verification, text analysis, and content moderation into your applications with a single API platform.