Add SMS to Your AI App in 10 Minutes (Cursor & Lovable Guide)

Adding SMS to an app you built with Cursor or Lovable should take about ten minutes. Get an API key, paste one prompt into your AI editor, and send your first text. Here is the whole path.

Why legacy SMS APIs slow down AI-assisted builds

Most SMS APIs were documented for a 2008 integration pattern: read the docs, install a heavy SDK, learn a dozen concepts, then finally send a message. That workflow fights the way people build now, which is to describe a goal to an AI editor and ship.

Signal House is built for how you actually build. There is a lightweight SDK your AI tools can read, and a clean API key, so you can be sending in minutes instead of sprints.

Step 1: Get your API key

Create an account at app2.signalhouse.io/register and grab your API key from the dashboard. That key is all your app needs to authenticate.

Step 2: Paste this prompt into Cursor or Lovable

This is the fastest path. Drop this into your AI editor and let it wire up the integration:

Add SMS to my app using the Signal House SDK (@signalhousellc/sdk). Initialize the client with my Signal House API key, which I will store as an environment variable called SIGNALHOUSE_API_KEY. When [describe your trigger, for example a new user signs up], send that user a text message. Use the SDK’s message-sending method and read the SDK’s types for the exact parameters.

Your AI editor installs the package, reads the SDK’s TypeScript types, and writes the send call for you. That is the whole point: you describe the outcome, and the SDK plus the AI handle the specifics.

Step 3: Or wire it up by hand

Prefer to write it yourself? Install the SDK:

npm install @signalhousellc/sdk

Import SignalHouseSDK, initialize it with your API key, and call its send method. The SDK ships full TypeScript types, so your editor autocompletes the parameters, and the complete reference, including the base URL and send options, lives at api.signalhouse.io.

You still need A2P registration (the fast version)

One step no provider can skip: to send business SMS in the US, you register a brand and campaign under 10DLC. Even solo builders do this. The good news is that Signal House makes it quick, with A2P approval as fast as 48 hours for many standard use cases. Register once, and you are cleared to send.

Where to go next

Once your first text sends, the same SDK handles two-way replies, webhooks for inbound messages, and wiring SMS into an AI agent so your app can text and respond on its own. That is where SMS gets interesting for AI-native products.

Create your account and get your API key: https://app2.signalhouse.io/register

FAQ: Adding SMS to an AI App

How do I add SMS to my app?

Get a Signal House API key, install the SDK (@signalhousellc/sdk), and either paste a prompt into your AI editor or call the SDK’s send method yourself. Most builders are sending within about ten minutes.

Can I use Signal House with Cursor or Lovable?

Yes. Point your AI editor at the Signal House SDK and your API key, and it will write the integration. The SDK ships TypeScript types the AI can read, so it knows exactly how to call it.

Do I need 10DLC registration as a solo developer?

Yes. Anyone sending business SMS in the US registers a brand and campaign under 10DLC. Signal House guides you through it, with approval as fast as 48 hours for many standard use cases.

Is there a free tier?

You can create an account and get your API key at app2.signalhouse.io/register, then check the current plans and any included credits when you sign up.

Is Signal House a Twilio alternative for AI apps?

Yes. Signal House is built for AI-assisted, no-code, and vibe-coding workflows, with a lightweight SDK and one-click integrations, rather than the heavier setup legacy providers assume.