kleinanzeigen-mcp

An MCP server that lets an AI search Kleinanzeigen listings and pull ad and seller details. It wraps the Kleinanzeigen Android app's API (api.kleinanzeigen.de / gateway.kleinanzeigen.de) and returns the important fields to the AI.

Highlights

• Visual Listing Analysis
  Downloads and analyzes the actual ad photos, allowing vision-capable AI to inspect an item's condition, wear, damage, completeness, and other visual details instead of relying only on the seller's description.

• Filters the API doesn't have
  title_only, require and exclude are applied server-side here and page on automatically, so an AI gets the number of real matches it asked for instead of re-searching to work around accessories and wrong variants.

• From discovery to full inspection
  Find relevant ads, then retrieve complete descriptions, itemised attributes, precise locations, seller reputation and all photos for a deeper analysis.

Related MCP server: marktplaats-mcp

Tools

search_kleinanzeigen(query, ...)

Search listings by free-text keyword and/or category (id or name). Filters for category-specific attributes, location/radius or postcode, price range, offer/wanted, private/commercial, shipping and "Direkt kaufen", plus sorting and paging.

Client-side filters, applied here over what Kleinanzeigen returns:

• title_only: every word of query must be in the title

• require: terms that must appear in title or description ("128gb" matches "128 GB" too)

• exclude: drop ads whose title carries these ("kabel" catches "Ladekabel", "pro" spares "Prozessor")

Returns a trimmed list of hits plus total / next_page / has_more.

get_ad_detail(ad_id)

Everything about one ad: full description, precise location, category, attributes, shipping options, all images and the seller's rating.

get_ad_images(ad_id, max_images=4)

Download an ad's photos server-side and return them as real image content (base64), so a vision-capable client sees the pictures instead of just URLs.

get_seller_info(seller_id)

Who is selling: name, private vs commercial, member-since date, ad counts, followers, badges and Kleinanzeigen's reputation score.

search_locations(query)

Look up location/region ids for search_kleinanzeigen's location_id filter by name prefix.

get_category_filters(category_id)

List the category-specific attribute filters search_kleinanzeigen's attributes argument takes for one category, straight from Kleinanzeigen's own search-options schema.

list_categories(query)

Browse Kleinanzeigen's category tree to find the category ids search_kleinanzeigen takes. The full tree ships with the server in data/categories.json.

Setup

Requires Python 3.9+.

pip install -r requirements.txt

Run

python main.py

The server starts over streamable HTTP and prints where it's listening:

Starting kleinanzeigen-mcp server on http://127.0.0.1:8000/mcp

Point your MCP client at that URL. Host, port and path live at the top of main.py.

Add it to Claude (and other MCP clients)

The server speaks streamable HTTP, so most clients only need the URL it printed on startup.

Claude Code

One command, no config file:

claude mcp add --transport http kleinanzeigen http://127.0.0.1:8000/mcp

Add --scope user to have it in every project instead of only the current one. claude mcp list shows whether the connection came up, claude mcp remove kleinanzeigen takes it out again.

Cursor, Codex, VS Code and other JSON-config clients

Same URL, in the client's MCP config:

{
  "mcpServers": {
    "kleinanzeigen": {
      "type": "http",
      "url": "http://127.0.0.1:8000/mcp"
    }
  }
}

Claude Desktop

Custom connectors (Settings > Connectors) are dialled from Anthropic's cloud, so they cannot reach a server bound to your own machine. Two ways around it:

Bridge over stdio with mcp-remote (needs Node.js). Open Settings > Developer > Edit Config, add the kleinanzeigen entry to claude_desktop_config.json and restart Claude Desktop:

{
  "mcpServers": {
    "kleinanzeigen": {
      "command": "cmd",
      "args": ["/c", "npx", "-y", "mcp-remote", "http://127.0.0.1:8000/mcp"]
    }
  }
}

On macOS/Linux drop the Windows wrapper: "command": "npx" with "args": ["-y", "mcp-remote", "http://127.0.0.1:8000/mcp"].

Or expose the server (cloudflared, ngrok, or run it on a box with a public hostname) and add that HTTPS URL under Settings > Connectors > Add custom connector. That route also makes the tools available in claude.ai and the mobile apps, not just the desktop client but the API it talks to is then reachable by whoever finds the URL, so put auth in front of it.

To stop confirming every call, open Settings > Connectors > kleinanzeigen and set the tools' dropdown on the right to Always allow.

Notes

• Search quirks worth knowing: total is capped at 10000 by Kleinanzeigen (so that value means "at least"), ads flagged is_top_ad are paid placements pinned above the sort order (include_top_ads=False for an honest price ranking), and a null price means "zu verschenken" or "VB" -- see price_type.

• data/categories.json is a flattened snapshot of Kleinanzeigen's category tree (title, id, children), built by scripts/build_categories.py from the live api/categories.json (which ships the tree wrapped in JAXB envelopes and a single "Alle Kategorien" pseudo-root). Re-run it if Kleinanzeigen changes their categories.

• coverage.json holds the platform counts shown in the badges above. scripts/update_coverage.py refreshes it from Kleinanzeigen's public "Über uns" page and a daily GitHub Action commits any change.

• API details are documented in search_api.md.

• This uses Kleinanzeigen's internal mobile API, not an official one. Be nice to it.

Disclaimer

This is an independent, unofficial project and is not affiliated with, endorsed by, or connected to Kleinanzeigen or Adevinta. "Kleinanzeigen" and all related trademarks belong to their respective owners.

It's published for educational and research purposes only. It talks to Kleinanzeigen's internal API, which is not meant for public use and may break or change at any time. You are responsible for how you use it: respect Kleinanzeigen's Terms of Service, robots rules and applicable law, and don't hammer their servers.

License

MIT LICENSE. Provided "as is", without warranty.