Create an auth app
Add your application name and domain. Instant Auth gives you a unique App ID and API keys for your configuration.
Fast setupPer-app isolation
Authentication APIs for web apps
Authentication that just works.
Instant Auth provides secure APIs for registration, login, email verification, password resets, and session management—so you can ship products faster instead of rebuilding authentication.
Available through the Instant Suite dashboard.
A typical account flow
API ready
User creates an accountRegistration request received
Email address is verifiedUser-requested confirmation
Authenticated session startsAccess token issued
How it works
Go live in minutes
Create one authentication app, connect your frontend, and let Instant Auth handle the rest.
Connect your account screens
Use our APIs or hosted UI for registration, verification, sign-in, logout, and password recovery. Your brand, our infrastructure.
APIs or Hosted UIFully branded
Operate with confidence
Monitor sign-ups, sign-ins, and security events with a clear, real-time audit trail for every app—one account-scoped service.
Real-time eventsOne dashboard
Features
The authentication lifecycle, covered
Use only the flows your product needs today, with room to add the rest as it grows.
Account registration
Create a user inside the correct auth app using an email address and password supplied by that user.
Email verification
Confirm that a new user controls the email address attached to the account before relying on it.
Sign-in and sessions
Authenticate returning users, issue application sessions, and refresh access without asking them to sign in again unnecessarily.
Password recovery
Let a user request a password reset and complete the recovery flow from a time-limited account email.
App-level isolation
Keep user records and authentication configuration separated by account and auth app ID.
Authentication activity
Maintain a useful history of registration, verification, sign-in, logout, and recovery events.
Responsible email
Account email people expect to receive
Instant Auth uses email only to complete or protect an account action. Messages are sent one-to-one to the address a person provides while using a connected application.
Verification
A person registers an account or asks for a new verification message.
Password recovery
An account holder explicitly requests help resetting a password.
Sign-in and security
An account holder requests a login link or receives a necessary account-security notice.
Our sending commitments
We do not buy, rent, scrape, or import third-party mailing lists.
We do not use Instant Auth email for newsletters, promotions, or unsolicited campaigns.
We stop sending to addresses that produce a hard bounce or spam complaint.
We monitor delivery feedback and investigate unusual bounce or complaint activity.
FAQ
Frequently asked questions
Straight answers about the product and its email use.
What is Instant Auth?
Instant Auth is an authentication API for web applications. It provides account registration, email verification, sign-in, password recovery, session, and authentication-activity capabilities through an app-specific configuration.
Who receives email from Instant Auth?
Only people whose address was entered during an account flow in a connected application. Email is triggered by actions such as registering, requesting verification, requesting a sign-in link, or resetting a password.
Does Instant Auth send marketing email?
No. Instant Auth email is reserved for transactional authentication and account-security messages. It is not used for advertising, newsletters, lead generation, or bulk outreach.
How are bounces and complaints handled?
Delivery feedback is monitored, and addresses associated with hard bounces or spam complaints are suppressed from additional sends. Repeated or unusual delivery problems are investigated.
Can one account support more than one application?
Yes. Each application receives its own auth app ID and domain configuration so its users and authentication activity remain appropriately scoped.
How much does it cost?
Instant Auth is available through Instant Suite. Sign in to view the access and product options currently available for your account.
Privacy
Instant Auth processes account and authentication data to provide the service, prevent abuse, and support account access. We do not sell personal information or use authentication email addresses for advertising.
Application operators remain responsible for collecting user data lawfully and providing any notices their users require. Account holders may contact us about access, correction, or deletion requests.
Terms of use
Instant Auth may be used only for lawful authentication and account-management workflows. Customers may not use the service to send unsolicited email, distribute harmful content, probe accounts they do not control, or interfere with the service.
Service access may be limited when necessary to protect users, email deliverability, or platform security. Product capabilities may evolve as the service is improved.
Policy last updated: August 1, 2026
Questions about Instant Auth?
Contact our support team for product, privacy, abuse, or email-delivery questions.