Marktplaats & 2dehands

io.github.jasp-nerdPublished by GitHub account jasp-nerdv0.2.0Updated Oct 26, 2026

Search Marktplaats & 2dehands (NL/BE classifieds), vet sellers, compare prices, use your account.

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingData & AnalyticsBusiness & Commerce

Overview

AI-generated overview

Searches Marktplaats.nl and 2dehands.be second-hand listings, vets sellers, compares prices, and with a login manages messages, bids and favorites.

What you can do
  • Search and browse listings with category, attribute, price, condition, distance and recency filters, and read full ad details
  • Explore the category tree and the filters available per category
  • Check seller trust signals and everything a seller currently offers
  • Monitor new listings with a stateless cursor and compute price statistics for a search
  • With a logged-in session: read inbox and threads, list your ads, favorites, bids and saved searches
  • With a logged-in session: send messages, contact sellers, place bids, set favorites and renew your ads
When to use it
Useful when hunting for used goods on the Dutch or Belgian classifieds and you want an assistant to filter results, judge whether a price is fair, check whether a seller looks legitimate, or watch for new ads. The account tools are for people who also want to handle messages and bids from the chat client.
Requirements
Either the hosted read-only endpoint, or a local process run with uvx (Python 3.10+). No API key or account is needed for search, details, seller checks, filters, price statistics and monitoring. Account tools need a session imported via the login command or the MARKTPLAATS_COOKIE / TWEEDEHANDS_COOKIE variables; on macOS the terminal may need Full Disk Access to read browser cookies.
Before you install
Account tools act on your real marketplace account: messages, offers and bids are sent after a confirm step, and bids are binding, so a mistaken confirmation costs money. The session cookie is a credential granting access to your account; it is stored in a local session file or in the cookie environment variables. Listing text and messages come from other users and should be treated as untrusted data. The server relies on undocumented marketplace endpoints that may change.

Installation

In SourceWeft

  1. Open Marktplaats & 2dehands in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.jasp-nerd%2Fmarktplaats-mcp/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "marktplaats-2dehands": {
      "type": "http",
      "url": "https://marktplaats-mcp.jaspnerd.dev/mcp"
    }
  }
}

README

[marktplaats-mcp: search Marktplaats and 2dehands from any AI agent]

English | Nederlands | Français

marktplaats-mcp: the Marktplaats & 2dehands MCP server

marktplaats-mcp is an MCP server for Marktplaats.nl (Netherlands) and 2dehands.be (Belgium), the Dutch and Belgian second-hand classifieds (tweedehands, petites annonces d'occasion). Search listings, filter on category attributes, vet sellers, compare prices and watch for new ads from Claude, ChatGPT, Cursor, Codex, Gemini or any other MCP client. With your own login it also reads and sends messages, places bids and manages your favorites and ads. No API key.

[PyPI version] [Python versions] [License: MIT] [CI] [Live API canary] [Downloads] [MCP registry]

🚀 Get started

No install: paste a URL. The hosted, read-only server runs at https://marktplaats-mcp.jaspnerd.dev/mcp. Add it as a custom connector in claude.ai (Settings → Connectors, works on the Free plan and mobile), ChatGPT, Mistral Le Chat, Perplexity or the Gemini app.

Claude Code: one command.

bash
claude mcp add --scope user marktplaats -- uvx marktplaats-mcp

Any other client. Install uv (brew install uv, or winget install --id=astral-sh.uv -e on Windows), then add the standard MCP config:

json
{ "mcpServers": { "marktplaats": { "command": "uvx", "args": ["marktplaats-mcp"] } } }

One click: [Add to Cursor] [Install in VS Code] [Add to LM Studio] [Add to Kiro]

Step-by-step instructions for 40 clients (Cursor, VS Code, Codex, Gemini CLI, Cline, Windsurf, JetBrains, Zed, opencode, Goose, ...), with the config path per OS and a link to each client's official guide: docs/clients.md.

Then ask: "Find a racefiets under €500 within 25 km of 1011 AB, frame 57-61 cm, and tell me if the sellers look legit."

[marktplaats-mcp trailer: an AI agent searches for a racefiets and vets the seller, rendered as a retro CRT terminal session]

👤 Use your own account (messages, favorites, bids, your ads)

Marktplaats has no public API and its login uses SMS two-factor authentication, so this server never asks for your password. It copies the session from a browser you are already logged into:

bash
uvx --from 'marktplaats-mcp[login]' marktplaats-mcp login

The session is stored in ~/.config/marktplaats-mcp/session.json, readable by your user only. Restart your MCP client and the account tools appear.

bash
marktplaats-mcp login --site 2dehands  # also import your 2dehands.be sessionmarktplaats-mcp login --read-only      # never send, bid or change favoritesmarktplaats-mcp login --window         # open a browser window and log in there insteadmarktplaats-mcp login --paste          # paste a Cookie header from DevTools insteadmarktplaats-mcp status                 # is the stored session still valid?marktplaats-mcp logout                 # delete it
If login says it could not read your browser's cookies
  • macOS: the system blocks command-line tools from reading browser data and does not ask. Once, open System Settings → Privacy & Security → Full Disk Access, add the terminal app you use (Terminal, iTerm, Warp, or VS Code), then quit and reopen it. Then run the login command again.
  • Windows: Chrome and Edge lock their cookie file while they run; the tool copies it first, so this normally just works. If it doesn't, close the browser and run the login again, or use --paste.
  • Linux: Chromium browsers store the cookie key in your keyring (GNOME Keyring or KWallet), which must be unlocked; Firefox needs nothing. Snap or Flatpak browsers keep their profile elsewhere, so use --paste there.
  • Everywhere: marktplaats-mcp login --paste never needs permissions. In your browser on marktplaats.nl press F12 → Network, click any request, copy the Cookie request header and paste it.

Or set MARKTPLAATS_COOKIE / TWEEDEHANDS_COOKIE (the request Cookie header) in your client's config. Sessions last weeks; when one expires the tools tell you to log in again.

Sending, contacting a seller and bidding return a preview first and only act when called again with confirm=true. Bids are binding on Marktplaats; the tool refuses bids below the minimum. Automated ad placement is forbidden by Marktplaats' terms and deliberately not implemented. See Safety model.

🧰 Tools

ToolWhat it doesAccountWrites
search_listingsSearch with query, category, subcategory, category-specific attributes, price range, condition, delivery (pickup/shipping), distance from a postcode, recency, negative keywords, sorting and pagination
get_listing_detailsFull ad: description, attributes, status (active/closed), exact listing time, view and favorite counts, bidding state and minimum bid, shipping, images, seller response rate and account age. Accepts pasted URLs
get_seller_profileTrust signals: verified bank account, identity, phone, business verification, payment method, review score and count, lowest bid the seller accepts
list_seller_listingsEverything one seller has on offer: spot dealers posing as private sellers and duplicate ads
list_categoriesThe category tree (names and ids) used for filtering, also available as an MCP resource
list_category_filtersDiscover the filters for a category (brand, frame height, mileage, fuel, RAM, ...) with their valid values and counts
check_new_listingsNewest-first monitoring with a stateless cursor: returns only ads placed after since, never skips one
analyze_pricesMedian, quartiles, min, max and mean asking prices for a search, plus the cheapest matches
get_my_accountSession check, unread messages and notifications✅
list_conversations, get_conversationYour inbox and full message threads✅
list_my_listings, list_favorites, list_my_bids, list_saved_searchesYour ads (views, favorites, highest bid, expiry), favorites, bids and saved searches✅
send_message, contact_sellerReply in a thread, or ask a seller a question or make a non-binding offer. Preview first, confirm=true to send✅✅
place_bidBid on a listing. Preview first, refuses bids below the minimum, marked destructive✅✅
set_favorite, extend_my_listingSave/unsave a listing; renew one of your expiring ads✅✅

Read-only tools carry the matching MCP annotations, so clients skip confirmation prompts for them and ask for the write tools. Every tool returns structured output with a real schema. Two prompts, bargain_hunt and vet_listing, encode the common workflows.

What you can say, and what happens

You sayThe agent calls
"Is €450 a fair price for an iPhone 15 128 GB in good condition?"analyze_prices → median, quartiles and the three cheapest ads
"Find a used Golf, 2018-2022, under 100,000 km, petrol, from a private seller"list_category_filters("Auto's") → search_listings(attributes={"Bouwjaar": "2018-2022", "Kilometerstand": "-100000", "Brandstof": "Benzine", "Adverteerder": "Particulier"})
"Is this seller trustworthy? What else are they selling?"get_listing_details → get_seller_profile → list_seller_listings
"Tell me when new bakfiets ads appear near Antwerp"check_new_listings(site="2dehands", postcode="2000", distance_km=25) with the returned cursor on every poll
"Ask the seller whether it's still available and offer €120"contact_seller(..., offer_euros=120) preview → you confirm → sent
"Reply to Piet that I can pick it up Saturday"list_conversations → send_message preview → you confirm → sent

🔒 Safety model

  • No credentials by default. Searching, details, seller checks, filters, price statistics and monitoring need no account.
  • Your session stays yours. The local server reads the cookie from your browser or a file only you can read, sends it only to marktplaats.nl / 2dehands.be, and never logs it. The hosted endpoint refuses to start with account credentials configured.
  • Writes are explicit. Sending and bidding preview first and require confirm=true; bids below the minimum are refused; login --read-only or MARKTPLAATS_READ_ONLY=1 disables writes entirely; every confirmed write is logged locally.
  • Untrusted content is labelled. Listing text and messages are written by other users; the server tells the model to treat them as data, never as instructions.
  • Polite to the marketplace. Requests are spaced (MARKTPLAATS_MIN_INTERVAL_MS, default 200), retried with backoff and Retry-After, and search pages are cached for a minute. The hosted endpoint is rate-limited per client and globally.
  • No affiliate links, no tracking. Listing URLs are returned exactly as the marketplaces publish them.

❓ FAQ

Is there an MCP server for Marktplaats?

Yes, this one. Free, open source (MIT), no API key. Paste the hosted URL into claude.ai or run uvx marktplaats-mcp.

Does it work with 2dehands.be and Belgium?

Yes. Every tool takes site="2dehands", and language="nl" or "fr" narrows Belgian results to one language.

Do I need a Marktplaats account or API key?

No. Only the account tools need your own login, and they use your existing browser session rather than a password.

Can AI read and send my Marktplaats messages, or place bids?

Yes, with the local server after marktplaats-mcp login. Sending and bidding show a preview and only act after you confirm.

Where are my login credentials stored?

In ~/.config/marktplaats-mcp/session.json on your machine, readable by your user only, or in the environment variables you set yourself. They are only ever sent to marktplaats.nl / 2dehands.be. marktplaats-mcp logout removes them.

Can I use it without installing anything?

Yes: the hosted endpoint https://marktplaats-mcp.jaspnerd.dev/mcp works in claude.ai, including the Free plan and mobile apps. It offers the read-only tools.

Does it work with ChatGPT, Cursor, Gemini, VS Code and Cline?

Yes. See docs/clients.md for step-by-step instructions per client. Any client that runs stdio servers can use uvx marktplaats-mcp; clients that support remote servers can use the hosted URL.

Is this official or affiliated with Marktplaats?

No. It is an independent open source project with no ties to Marktplaats, 2dehands or Adevinta. It uses the same public JSON endpoints the websites use; that API is undocumented and may change, which is why a live canary runs every day.

Why do I sometimes see fewer results than the limit, or total_count looks high?

Paid promotions (DAGTOPPER, TOPADVERTENTIE) are filtered out by default; pass include_sponsored=true to see them. total_count is the marketplace's raw count before that filtering.

Which Python versions are supported?

3.10 and up. CI tests 3.11 through 3.13 on Linux, macOS and Windows.

📚 Docs

🗺️ Roadmap

  • Cross-site search (NL and BE in one call)
  • Saved-search creation from the agent
  • Claude Desktop extension bundle (MCPB)

🤝 Contributing

PRs welcome. See CONTRIBUTING.md for the dev setup: uv sync --all-groups, then uv run pytest. uv run python scripts/e2e_smoke.py runs the live canary.

This project reuses proven ideas from marktplaats-py, marktplaats-monitor, marktplaats-2dehands-mcp and PonClick/marktplaats-mcp. Details in THIRD_PARTY_NOTICES.md.

If this saved you a trip to Marktplaats, a star helps other people find it.

📄 License

MIT © 2026 jasp-nerd

mcp-name: io.github.jasp-nerd/marktplaats-mcp

Source: README.md at commit 41e0558

Tools

8

search_listings

Search listings

Search second-hand listings on Marktplaats or 2dehands with filters for category, category-specific attributes, price range, condition, delivery, recency and distance from a postal code. Paid promotions are filtered out unless include_sponsored is set.

Parameterssitelimitqueryoffsetcompactexcludesort_bycategorydeliverylanguagepostcodeprice_to+9 more

get_listing_details

Get listing details

Fetch the full advertisement: complete description, attributes, status (active/closed), exact listing time, view and favorite counts, bidding state, shipping, images, and seller signals such as response rate and account age.

Parameterssitelisting_idrequiredmax_images

get_seller_profile

Get seller profile

Look up a seller's trust signals: verified bank account / identity / phone number, business verification, payment method, review score and count. Null means the marketplace does not report that signal. Use list_seller_listings to see everything the seller currently offers.

Parameterssiteseller_idrequired

list_seller_listings

List a seller's listings

Everything one seller currently has on offer. Useful to spot dealers posing as private sellers, duplicate or suspicious ads, and bundle deals.

Parameterssitelimitqueryoffsetcompactsort_byseller_idrequiredsort_order

list_categories

List categories

Browse the category tree (shared by marktplaats.nl and 2dehands.be) to find names/ids for search_listings' category and subcategory filters.

Parametersparent

list_category_filters

List category filters

Discover the filters available for a category or search (brand, frame height, mileage, fuel, RAM, ...), with their valid values and how many ads match each. Pass the labels to search_listings' 'attributes' parameter.

Parameterssitequerycategorymax_optionssubcategory

check_new_listings

Check new listings

Poll for listings placed after a given moment (newest first, paid promotions filtered out). Stateless: store the returned 'cursor' and pass it as 'since' on the next call. When the result is truncated the cursor only advances to the oldest ad returned, so nothing is ever skipped.

Parameterssitelimitquerysinceexcludecategorydeliverylanguagepostcodeprice_toconditionattributes+3 more

analyze_prices

Analyze prices

Price statistics (min, quartiles, median, max, mean) over the most relevant asking prices for a search, plus the cheapest matches. Free, bidding-only and reserved ads are excluded and outliers beyond 1.5x the interquartile range are trimmed. Most reliable with a subcategory plus attributes (e.g. subcategory 'Mobiele telefoons | Apple iPhone', attributes {'Model': 'iPhone 15', 'Opslagcapaciteit': '128 GB'}) instead of free text, which drags in accessories.

Parameterssitequeryrequiredexcludecategorydeliverylanguagepostcodeprice_toconditionattributesprice_fromdistance_km+2 more

Version history

2
  1. v0.2.0LatestSep 20, 2026
  2. v0.1.1Sep 16, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts