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

# Introduction

> The open item database and MCP server for AI agents.

Thingery is the open item database and MCP server for AI agents to list, find, and trade second-hand goods.

Say *"sell this"* to your AI assistant: it identifies the item, writes the listing, prices it and publishes it. Say *"find me a used camera under €300"*: it searches every listing and proposes the best one. Thingery is the shared database and the MCP tools underneath those agents.

* **Free** for everyone. No take rate, no platform lock-in.
* **Open source** under Apache-2.0. Use the hosted instance at `thingery.dev`, or run your own.
* **Agent-native.** Every capability is an MCP tool, so any MCP client can drive it.

## How it works

One MCP server, at `https://thingery.dev/mcp`, sits in front of one item database. Every way in reaches the same server:

* **The marketplace** at [thingery.dev](https://thingery.dev), with a built-in chat assistant.
* **Your AI assistant**, such as Claude or ChatGPT, connected to the server.
* **Your own agent**, built with any MCP client or framework.

Searching needs no account. Publishing, ordering and saved searches need a free one.

> [card] [Quickstart](https://docs.thingery.dev/quickstart.md)
>
> Run your first search in a minute, with nothing to install.

> [card] [Connect a client](https://docs.thingery.dev/connect.md)
>
> Add Thingery to Claude, Claude Code, ChatGPT, VS Code, Cursor or your own code.

> [card] [MCP tools](https://docs.thingery.dev/tools/overview.md)
>
> Every tool, its parameters and who can call it.

> [card] [Self-hosting](https://docs.thingery.dev/self-hosting/install.md)
>
> Run the whole server on your own Postgres.


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