https://www.sms-sdk.com One TypeScript SDK for SMS providers. Send with Twilio, Telnyx, Plivo, Vonage, Bandwidth, or Sinch through one typed API, with safe fallback and zero runtime dependencies. https://www.sms-sdk.com/blog/twilio-vs-vonage https://www.sms-sdk.com/blog/twilio-vs-vonage Twilio vs Vonage from the code side: how each SMS API sends, authenticates, signs webhooks, reports errors, and handles STOP, plus how to use both from one TypeScript client. Thu, 12 Nov 2026 00:00:00 GMT https://www.sms-sdk.com/blog/10dlc-registration-for-developers https://www.sms-sdk.com/blog/10dlc-registration-for-developers 10DLC registration for the code that sends your texts: brands, campaigns, and numbers, why an unregistered send is accepted and then fails with Twilio 30034 or Telnyx 40010, and how to catch it in TypeScript. Tue, 03 Nov 2026 00:00:00 GMT https://www.sms-sdk.com/blog/sms-otp-api-typescript https://www.sms-sdk.com/blog/sms-otp-api-typescript Send SMS verification codes through your own Twilio, Plivo, or Vonage account in TypeScript: generate the code, send it once even when a request times out, limit guesses, and test it offline. Mon, 02 Nov 2026 00:00:00 GMT https://www.sms-sdk.com/blog/sms-opt-out-handling https://www.sms-sdk.com/blog/sms-opt-out-handling What your code has to do when someone texts STOP: catch the reply, keep one suppression list for every provider, block sends before they go out, and handle START and HELP. With tested TypeScript. Sun, 01 Nov 2026 00:00:00 GMT https://www.sms-sdk.com/blog/send-sms-api-typescript https://www.sms-sdk.com/blog/send-sms-api-typescript Send an SMS from TypeScript with one HTTP request to Twilio, Telnyx, Plivo, Vonage, Bandwidth, or Sinch, then add a protected route, idempotency, and delivery webhooks. Sat, 31 Oct 2026 00:00:00 GMT https://www.sms-sdk.com/blog/sms-fallback-without-duplicate-texts https://www.sms-sdk.com/blog/sms-fallback-without-duplicate-texts Falling back to a second SMS provider on any error sends duplicate texts. Which errors are safe to fall back on, why timeouts and 5xx aren't, and how to build it in TypeScript. Fri, 30 Oct 2026 00:00:00 GMT https://www.sms-sdk.com/blog/twilio-alternative https://www.sms-sdk.com/blog/twilio-alternative Looking for a Twilio alternative for transactional SMS? How Telnyx, Plivo, Vonage, Bandwidth, and Sinch differ for developers, what a switch changes, and how to keep it to one adapter change in TypeScript. Thu, 29 Oct 2026 00:00:00 GMT