# Open Support Directory (OSD)

> OSD uses Agentic Resource Discovery (ARD) to help AI assistants find a brand's customer-support agents and verify that the brand endorses them. Assistants then connect through the agent's own protocol, such as MCP or A2A.

Each link below is the Markdown version of a documentation page; Use `/index.md` for the home page; for other pages, replace the trailing slash with `.md`. The complete documentation is available as a single file at https://docs.openservicedirectory.org/llms-full.txt.

## Overview

- [Home](https://docs.openservicedirectory.org/index.md): Help AI assistants find a brand's endorsed customer service.
- [What is OSD?](https://docs.openservicedirectory.org/getting-started/what-is-osd.md): How Open Service Directory (OSD) uses ARD to help assistants find support agents and check brand endorsement.
- [How OSD works](https://docs.openservicedirectory.org/getting-started/how-osd-works.md): From publishing a support listing to connecting an assistant to the support agent.

## Get started

- [Discover support](https://docs.openservicedirectory.org/guides/discover-support.md): Find a support listing, check the brand's endorsement, and pass the selected agent to an assistant.
- [Use the OSD CLI](https://docs.openservicedirectory.org/guides/use-the-osd-cli.md): Search for support, verify a listing, and connect to a support agent through MCP.
- [Publish a support agent](https://docs.openservicedirectory.org/guides/publish-a-support-agent.md): Describe a support agent, publish the brand's endorsement, and make the entry available for discovery.
- [Point to a Poppy agent](https://docs.openservicedirectory.org/guides/point-to-a-poppy-agent.md): List a brand that supports the Personal Agent Protocol (Poppy) by pointing an OSD entry at the brand's poppy.json document.

## Understand OSD

- [OSD and ARD](https://docs.openservicedirectory.org/concepts/osd-and-ard.md): What OSD inherits from Agentic Resource Discovery and what it adds for brand support.
- [Discovery flow](https://docs.openservicedirectory.org/concepts/discovery-flow.md): Brand identity, discovery sources, endorsement outcomes, and agent selection.
- [Trust model](https://docs.openservicedirectory.org/concepts/trust-model.md): The evidence supplied by a brand domain, a registry, and the support agent.
- [Actors and components](https://docs.openservicedirectory.org/concepts/actors-and-components.md): Who publishes, discovers, selects, and operates a support agent.

## Optional

- [Full documentation](https://docs.openservicedirectory.org/llms-full.txt): Every page above concatenated into one Markdown file.