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Bring conversations into your workflow

A focused API for business messaging.

Use authenticated endpoints and webhooks to create approved sends, observe delivery, and connect customer replies to the systems your team already uses.

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$29/month when approved service can activate · no free trial · 500 units included

Business software and a messaging inbox connected through a secure integration hub
Connect the workflow
  • Server-side credentials
  • Idempotent sends
  • Signed webhook events

How the workflow moves

From the first signal to a resolved conversation.

  1. 01

    Authenticate the company

    Use workspace-scoped credentials from a trusted server environment. Never expose credentials in browser code.

  2. 02

    Create the action

    Submit the recipient, approved content, and an idempotency key through the documented endpoint.

  3. 03

    Reconcile the result

    Consume signed callbacks for inbound messages and delivery changes, then acknowledge retries safely.

01

REST foundations

Predictable requests and explicit outcomes.

Version 1 exposes contact upsert/lookup, queued one-to-one sends, reminders, and conversation/message reads under /api/v1.

  • Bearer workspace API keys
  • Idempotency-Key on every mutation
  • 202 for accepted mutations
02

Webhook safety

Verify before you trust an event.

Verify Smsify-Timestamp and the v1 HMAC over timestamp-dot-raw-body, deduplicate Smsify-Event-Id, and treat repeated delivery as normal.

  • Inbound message and opt-out
  • Delivery and reminder result
  • Exponential retry and delivery logs
03

Usage-aware automation

The API uses the same transparent unit model.

Messages consume their rendered carrier segments. Account balance, consent, suppression, and sending controls still apply.

  • Segment-based SMS units
  • Shared account balance
  • No compliance bypass through API

Clear before you commit

Questions, answered.

Need another detail? Review the help center before creating an account.

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Is the API available during a trial?

SMSify has no free trial. API access is part of an active eligible subscription.

Can browser JavaScript call the API directly?

Use SMSify credentials only from a trusted server. Client-side applications should call your own backend.

Make the next message answerable

Give customers one number—and your team one conversation.

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$29/month begins when the approved service can activate. No free trial. Company and carrier review apply.