Test mobile phone number verifications, SMS-based two-factor authentication (2FA), and critical security alerts. Automatically detects 4-digit and 6-digit numeric passcodes without carrier contracts or Twilio API keys.
No incoming SMS recorded.
Send an SMS via the API console below.
Real telecom SMS gateways (Twilio, MessageBird, AWS SNS) charge per delivery, require regulatory A2P 10DLC registration, and take several seconds to hit physical handsets. Playground API intercepts SMS requests locally in memory with sub-millisecond latencies.
Detects 4-digit or 6-digit codes automatically and attaches them to the otp_code JSON attribute.
Emits SSE events (sms.received) and WebSocket broadcasts whenever a message arrives.
Dispatch SMS messages and query active device logs.
Swap your production Twilio URL to Playground API in your local and staging environments.