---
title: Apple Messages | API Docs
description: Apple Messages for Business — inbound-first, brand-scoped, consent-gated.
---

A separate API from Linq V3: its own spec, SDK, credentials, and base URL (`https://messages.api.linqapp.com/v1`).

Building with an AI agent?

Feed these docs straight to your LLM or coding agent: [`llms-full.txt`](https://docs.linqapp.com/channel/amb/llms-full.txt) is the complete Apple Messages documentation in one file, and [`llms.txt`](https://docs.linqapp.com/channel/amb/llms.txt) is a concise index. Both cover this channel only — iMessage and WhatsApp publish their own.

## How it differs from iMessage

|                  | iMessage (V3)             | Apple Messages                                         |
| ---------------- | ------------------------- | ------------------------------------------------------ |
| Identity         | phone lines you own       | one registered business                                |
| Chat shape       | n-party, up to 31 handles | strictly 1:1                                           |
| Who speaks first | you may message first     | **inbound-first** — invitations are the only exception |
| Idempotency      | optional field            | **required header**                                    |
| Delivery signal  | delivered + read receipts | neither exists; `sent` means accepted                  |
| Consent          | STOP keywords             | a first-class consent ledger                           |

[API reference ](/channel/amb/api/index.md)All 52 operations, with a request and response for each.

[Sending ](/channel/amb/api/resources/chats/subresources/messages/methods/send/index.md)Parts, idempotency, and why one send can become several messages.

[Consent ](/channel/amb/api/resources/consent/methods/attest/index.md)Attestation, categories, and automation pause.

[Invitations ](/channel/amb/api/resources/invitations/index.md)The one way to start a conversation.