The hard part of QA is usually somewhere else.

Your application may be yours, but its most important journeys cross Stripe, Twilio, email, identity, and S3. Molar gives those boundaries state, time, and callbacks so your tests can ask what happens next.

Connected test servicesIllustrative setup
Your applicationOne isolated test environment
SStripePayment state
@EmailVerification & receipts
TTwilioSMS & OTP
AAuthSessions & identities
S3StorageFiles & uploads
SnapshotAdvance timeRestore

Checkout that reaches a verdict

Exercise payment intent states, 3DS branches, subscription timing, refunds, disputes, and signed callbacks in a controlled clone world.

Signup that receives the code

Provision a connector controlled identity, read the delivered OTP or magic link, and continue the user journey without a personal inbox.

Webhook behavior under time

Advance clocks, trigger events, and inspect deterministic retries instead of waiting on vendor timing or burning sandbox quota.

A shared world for one journey

Run the app against the Stripe, Twilio, Email, Auth, and S3 clones under one run identity. Snapshots and virtual time make the setup repeatable across local and CI workflows.

  • Five core service clones
  • Vendor shaped APIs
  • Deterministic snapshots and callbacks
Go to documentation
Checkout journeyIllustrative workflow
checkout.acme.test
PaymentAcme Pro plan4242 4242 4242 424208 / 28 · Test card
Signed callbackPayment webhookPOST /webhooks/payment signature verified
Order #1042ConfirmedReceipt → test inbox

Use live systems deliberately

Clones cover supported integration paths. When you need a vendor specific behavior outside that surface, keep a separate authorized contract check and label the boundary clearly.

Talk through your use case
Identity journeyIllustrative workflow
acme.test / sign up
Create accountJoin your workspace
Acme · test inboxVerify your emailYour code is ready to use.
482190
SessionWorkspace readyMember identity verifiedsession_7f24

A few things
you might be wondering.

Have a specific workflow in mind?
Let’s talk it through

Is this just HTTP mocking?

The core value is stateful service behavior: records, clocks, retries, signed webhooks, and cross step consequences. Coverage is still bounded to implemented paths.

Which services are first class?

Stripe, Twilio, Email, Auth, and S3 are the five core clone services.

How are live side effects protected?

Clone workflows use isolated test services, and Molar's SDK refuses identified live vendor destructive calls before network I/O.

Test an integration journey.

Choose a concrete workflow. We’ll help you get the right setup for your application.