> ## Documentation Index
> Fetch the complete documentation index at: https://docs.trychert.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Chert

> iMessage infrastructure for trusted communication at scale

Chert provides the infrastructure for teams to send, receive, and
automate conversations over iMessage using APIs.

## Pick an integration path

<CardGroup cols={2}>
  <Card title="Use the Messaging API" icon="code" href="/api/quickstart">
    Send from your backend with bearer auth or HMAC. Best when you already own the product UI.
  </Card>

  <Card title="Install Salesforce" icon="salesforce" href="/salesforce/overview">
    Add iMessage sending and reply logging to Lead, Contact, and Account records.
  </Card>

  <Card title="Install HubSpot" icon="hubspot" href="/hubspot/overview">
    Send from contact records, workflow actions, and contact-created automations.
  </Card>

  <Card title="Connect Slack" icon="slack" href="/slack/overview">
    Route replies into Slack channels for review, triage, and agent operations.
  </Card>
</CardGroup>

## What Chert handles

| Layer              | What you get                                                          |
| ------------------ | --------------------------------------------------------------------- |
| Delivery           | Managed iMessage lines, routing, retries, and delivery events.        |
| Conversation state | Tenant-scoped chats, messages, phone-line pinning, and reply history. |
| Integrations       | Packaged CRM and Slack surfaces on top of the same messaging layer.   |

## Start here

* [Quickstart](/quickstart) — choose API, Salesforce, HubSpot, or Slack.
* [Usage examples](/api/usage-examples) — copy common API flows.
* [Authentication](/api/authentication) — bearer auth for scripts, HMAC for production.