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SendiMessage
Start Pilot
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See SendiMessage in action

See how your application can send customer messages, receive replies, and react to events through managed iMessage + SMS infrastructure.

  • Real API requestA live POST /send-message on a managed line — not slides.
  • Incoming reply + webhookThe customer answers; the signed receive event reaches your app.
  • Managed messaging lineiMessage where supported, with SMS fallback.
15–20 min technical walkthrough
  1. Your product
  2. Choose a time
  3. Confirmed
What matters most to you? (optional, pick any)

We use your details only to review your request and contact you about SendiMessage. We never sell your data.

In the demo you’ll see
  1. 01Send an API messageA real API request using a managed SendiMessage line.
  2. 02Watch delivery statusqueued → sent → delivered on the actual message.
  3. 03Reply as the customerAn inbound reply comes back to the managed line.
  4. 04Receive the webhookThe reply reaches an application as a signed webhook event.
  5. 05View the conversationThe same thread inside the SendiMessage dashboard.
The flow we’ll walk through
Your application
SendiMessage API
Managed messaging line
Customer (iMessage, SMS fallback)
Customer reply
Webhook to your application
curl -X POST https://api.sendimessage.com/v1/send-message \
  -H "X-API-Key: $API_KEY" -H "X-API-Secret: $API_SECRET" \
  -d '{ "number": "+15555550123", "content": "Your appointment is confirmed." }'

The real endpoint — one POST, iMessage first where supported, SMS fallback, replies back as signed webhooks.

A good fit if you’re building

AI agentsVoice AI / AI receptionistsCRM softwareLead managementAppointment & booking toolsVertical SaaSCustomer communication productsAutomation systemsAgency client integrations

…and you need

API-based messagingiMessage capabilitySMS fallbackIncoming repliesWebhooksManaged messaging lines

SendiMessage is designed for legitimate application-to-customer communication and product integrations — not unsolicited bulk messaging.

Common questions

Do we need to replace our existing SMS provider?

No. Most teams start by adding SendiMessage for the conversations where iMessage matters and keep their current provider running. Nothing about the integration requires a migration.

Can we receive customer replies?

Yes — inbound replies arrive on your managed line and reach your application as signed webhook events, and the full conversation is visible in the dashboard.

Can we start with a single line?

Yes. The Developer Pilot starts with one provisioned line so you can integrate and evaluate with real conversations before scaling.

Is this only for AI companies?

No. AI agents are a common use case, but the API fits any product that messages US customers — CRMs, booking tools, vertical SaaS, and agency client work.

Dedicated managed lines start from the current published pricing, and the Developer Pilot covers the first month. View Pricing →