Can we send and receive SMS with real numbers?

Yes. MailSlurp provisions real numbers and supports receiving and automating SMS workflows through APIs and webhooks.

Is this suitable for OTP and MFA testing?

Yes. Teams use SMS APIs to validate OTP behavior in CI and pre-production environments before rollout.

Can we control messaging by country or region?

Yes. Product pages include regional options and provisioning paths for supported locales.

How does SMS connect with email and automation flows?

MailSlurp uses a unified platform model so teams can coordinate SMS, email, and downstream automation from one workflow layer.

SMS API and SMS verification API for OTP codes, testing, and automation

Trusted by teams at

Core capabilities

Capabilities for dependable mobile messaging

Designed for engineering, QA, and operations teams

Capability 1

Phone number lifecycle management

Provision, assign, and rotate numbers with governance that scales from QA to production.

Region-specific number provisioning
Programmatic ownership and reuse controls
Predictable setup for auth and notification paths

See regional phone APIs

Capability 2

Programmable send, receive, and routing

Control message flow through APIs and events instead of manual inbox checking or brittle scripts.

Receive SMS and parse verification content
Route events to internal systems with webhooks
Drive downstream decisions from message data

See routing patterns

Capability 3

Testing and observability for auth confidence

Monitor OTP and verification outcomes in CI and staging with reproducible checks.

End-to-end OTP testing workflows
Failure analysis with traceable message events
Release gating for high-risk auth changes

See OTP testing guide

Technical references

Implementation details for this product category

Practical guidance, use-case mapping, and direct links to tools and docs.

MailSlurp provides an SMS API and real programmable phone numbers for teams that need reliable SMS verification flows, OTP testing, and inbound message automation. Provision numbers on demand, receive SMS messages in code, and connect mobile events to your workflows.

Use this category for:

OTP and verification code flows
regional phone number provisioning
SMS routing and API-driven delivery

SMS API use cases

SMS verification API (OTP codes): test and operate sign-up, login, and recovery flows that depend on one-time passwords. Start with Phone number SMS service and the OTP testing guide.
Receive SMS API (inbound SMS processing): capture inbound text messages and route them into your application logic. Start with Phone number SMS service.
Regional coverage and number provisioning: provision numbers by geography to match your user base and compliance needs. See UK phone number rental and Hong Kong and China mobile numbers.

Recommended guides for SMS and OTP testing

Pair SMS verification with end-to-end testing

If your SMS API workflow is part of a larger auth journey (email magic links, password resets, multi-step onboarding), connect it to the Testing category for inbox and OTP coverage across channels.

Deploy global SMS workflows with real programmable phone numbers

Use cases for SMS API and programmable phone numbers

Mock SMS flows miss real-world edge cases

Regional messaging complexity slows launches

Verification reliability is hard to measure

SMS verification API for signup and login

Global number provisioning for product teams

Receive SMS API for operational pipelines

Two-channel verification with email plus SMS