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

# Platform overview

> One platform, four access layers — API, MCP, CLI, and Skills over the same Reply.io workspace.

Reply.io exposes one sales-engagement platform through four access layers. They share the same
account, the same [API key](/api-reference/authentication), the same object model, and the same
[rate limits](/api-reference/rate-limits) — pick the surface that fits how you (or your agent) work.

## Pick your surface

<CardGroup cols={2}>
  <Card title="REST API" color="#005AFF" icon="code" href="/api-reference/introduction">
    The exhaustive surface. Every endpoint, schema, and webhook — for production integrations.
  </Card>

  <Card title="MCP" color="#9747FF" icon="plug" href="/mcp/overview">
    70 annotated tools for MCP clients — Claude, Cursor, and custom agents.
  </Card>

  <Card title="CLI" color="#1BC13F" icon="terminal" href="/cli/overview">
    `reply` in your terminal — sign in once, then call any v3 endpoint as yourself.
  </Card>

  <Card title="Skills" color="#F6B802" icon="wand-magic-sparkles" href="/skills/overview">
    Outbound expertise and guardrails as markdown skill packs for your AI assistant.
  </Card>
</CardGroup>

Not sure which to use? See [Choose your interface](/agents/choose-your-interface).

## Go further

<CardGroup cols={2}>
  <Card title="Guides" icon="map" href="/guides/launch-outreach">
    Task-based guides — from importing contacts to building an AI SDR.
  </Card>

  <Card title="For AI agents" icon="robot" href="/agents/overview">
    Agentic capabilities, safety rules, and drop-in prompts.
  </Card>

  <Card title="OpenAPI & Postman" icon="file-code" href="/openapi-postman">
    Download the OpenAPI spec or import the Postman collection.
  </Card>

  <Card title="Slack community" icon="slack" href="/slack">
    Ask questions, share feedback, and request features.
  </Card>
</CardGroup>