MCP in ChatGPT / Claude

A-Market is an MCP server, so AI assistants can search the marketplace and (for dealers) manage listings directly. Connect it once as a custom connector and then just talk to it.

Environment	MCP endpoint
Production	https://mcp.amrkt.ch/mcp
Staging	https://mcp-staging.amrkt.ch/mcp

Add the connector

Claude (web / desktop)

Settings → Connectors → Add custom connector → URL https://mcp.amrkt.ch/mcp → Add. Open it, Connect, and complete the login in the popup.

ChatGPT

In a context that supports custom MCP connectors, add a connector with the URL https://mcp.amrkt.ch/mcp and complete the sign-in when prompted.

The connection uses standard OAuth 2.1: the client discovers the authorization server, you log in with your A-Market account (Keycloak), and approve the scopes (listings:read to search, listings:write to manage listings). No API keys to copy — the assistant gets a scoped token.

No setup on the server side

The realm ships with anonymous Dynamic Client Registration open and the listings:* scopes as realm defaults, so a fresh assistant registers itself and requests the right scopes with no manual Keycloak steps.

What you can ask

Once connected, the assistant has the A-Market tools. Try:

As a buyer

"Search A-Market for a used electric car under CHF 35,000, first registered after 2021, within 25 km of Bern. Rank them by price rating and shortlist the three best deals."

"Compare these two listings and add the cheaper one to my favorites."

As a dealer

"Create a listing on A-Market: 2020 VW Golf 2.0 TDI, 78,500 km, automatic, CHF 18,900, with this description… then show me all my active listings."

"Mark my sold Audi A4 as sold and drop the price of the 2019 320d to CHF 21,900."

The assistant calls the tools, shows you what it did, and asks before destructive actions.

Try it locally first

To exercise the full OAuth connector flow without the production server, tunnel a local stack over HTTPS with ngrok — see Operations → test a remote connector locally.

Build your own agent

Want this inside your own automation rather than a chat app? See Autonomous agent (MCP SDK) for a concrete, vendor-neutral example.