Catawiki Scraper & Auction Price Monitor

Track Catawiki auction prices, current bids and sold lots without checking every object by hand. This Catawiki scraper accepts keywords, category pages, auction URLs and individual lot links. Export structured observations to CSV, Excel or JSON, or keep a watch running: new lots and actual changes are delivered, while unchanged observations are free of result charges in monitor mode.

Built for collectors, dealers and auction researchers who need to distinguish a live bid from a confirmed final bid. It reads public pages without a Catawiki account and never bids or buys.

Start with a small watch

{
  "searchQueries": ["rolex"],
  "mode": "monitor",
  "stateName": "my-rolex-watch",
  "maxItems": 20,
  "maxPages": 2,
  "maxKnownChecks": 10
}

Run again with the same stateName and locale to compare observations. Use a separate state name for each watchlist or customer. The default limits favour small, predictable runs. Set a maximum run cost in Apify as an additional guardrail.

For a known object, including a recently closed auction lot:

{
  "startUrls": [{"url": "https://www.catawiki.com/en/l/107740761"}],
  "mode": "snapshot",
  "maxItems": 1
}

Example URLs can disappear or change status. Snapshot mode returns and charges each successful lot observation, including on repeated runs.

What a price means

Field	Meaning
currentBid	Displayed bid for an open lot; null after closure
lastBid	The displayed bid amount at observation time, including closed lots
finalBid	Set only when the public bidding data explicitly says closed and sold
status	open, sold, or closed_unsold
currency	Currency reported by the public page; no exchange-rate conversion
reservePriceSet, reservePriceMet	Published indicators when available; never the hidden reserve amount
estimateLow, estimateHigh	Published expert estimate in the reported currency, or null
nextMinimumBid	Next allowed bid shown for an open lot, when available

A bid is not the total purchase cost. Buyer Protection fees, shipping and taxes are excluded. An estimate is not a valuation guarantee. A sold label records the site's auction outcome; it does not prove payment, delivery or the absence of a later cancellation. Closed but unsold objects never receive a fabricated final price.

Direct lot pages may omit the separate reserve-set indicator even when the catalogue exposes it. Missing data stays null. Some currency-specific estimates are not published. The source decides which currency it shows; this Actor does not promise EUR, GBP or USD conversion.

Monitoring and price changes

The first successful observation of a lot produces a lot row. Subsequent runs produce a change row when supported fields change: bid, currency, closed/sold status, end time, reserve status, estimate, title, subtitle or specifications. changeFields, previousValues and observation timestamps show what changed. One changed observation receives one change event even if several fields changed.

Known open lots that have disappeared from current search pages can be revisited through their saved public lot URLs, up to maxKnownChecks and the overall maxItems limit. This helps capture closure. If search results fill the overall limit, there may be no room for those revisits; uncheckedKnownLots makes this visible. Narrow your search or increase the limits for a focused watch.

Disappearance, a 404 or a blocked page is not treated as a sale. Closed lots are not automatically revisited once absent from the supplied sources. Include their URLs explicitly to check later corrections. Monitoring records changes between observations, not every intermediate bid.

State is limited to 1,000 known lots per watch. It retains identifiers, public URLs, comparison fields and timestamps—not seller or bidder profiles. Changing queries while retaining a state name retains its existing tracked lots; use a fresh state name for a different watch. Concurrent runs of the same watch are guarded by a best-effort lease; schedule them sequentially. If delivery is interrupted mid-checkpoint, the run stops on restart instead of replaying a potentially billed row. Exactly-once delivery across external failures is not guaranteed.

Inputs and limits

Input	Default	Meaning
searchQueries	Rolex if no targets supplied	Up to 20 keywords and URLs combined
startUrls	Empty	Public /s, /c, /a or /l Catawiki URLs
locale	en	Generated query language: en, nl, fr, de, es, it or pt; pasted URLs retain theirs
mode	monitor	Deliver new/changed observations; snapshot delivers every successful observation
stateName	catawiki-watch	Reuse for the same watch; letters, digits, hyphens and underscores
maxItems	20	Maximum unique lots inspected across the run, including failed and known lots; 1–200
maxPages	2	Catalogue pages per target; 1–10
maxKnownChecks	20	Additional known-open-lot checks within the overall item limit; 0–100
maxRequests	100	Public HTTP request cap, including redirects and recovery; 1–500
maxRunSeconds	150	Working time limit; 30–240 seconds, with brief cleanup afterwards
connection	auto	Direct first, at most one datacenter recovery; direct and datacenter are explicit alternatives

Targets are processed in the supplied order. A broad first query can consume the item limit before later targets are inspected. Copy public filtered URLs from Catawiki; supported query keys are q, page, filters and sort. Filtering and ordering remain source-defined. Unsupported URLs and parameters are rejected instead of silently changing their meaning.

Output and coverage

Each row includes the lot ID and link, title/subtitle, price/status fields, auction/category IDs, public specifications, available images, timestamps and change metadata. Detailed lot observations are included in the result price; there is no separate detail surcharge.

OUTPUT reports lotsChecked, lotsDelivered, changesDelivered, unchangedLots, failedLots, sources, partial, stopped, warnings, uncheckedKnownLots, requests, connectionAttempts, recoveryEvents and chargedEvents.

Do not rely only on a green run status. A run can contain useful data and still be partial due to item, page, time, state or request limits. Source complete describes the supplied catalogue coverage; lot-detail failures are separately counted in failedLots and warnings. A structured no-match search is different from a blocked or unrecognized page. Catawiki sometimes fills an empty search with recommendations; those are dropped and counted in fallbackLotsDropped.

This is a bounded watch, not a full historical sales database. Catawiki does not provide a complete searchable archive of sold lots through these pages. Use known lot/auction links while they remain publicly available, and schedule observations near closure. Very old or removed objects can return not found. Search rankings, catalogue counts and live bids may change during a run.

Pricing

Event	Price	When charged
lot	$0.0025	A delivered new lot in monitor mode, or a delivered snapshot
change	$0.0015	A delivered changed observation of a known lot
apify-actor-start	$0.00005 per allocated GB, minimum one	Standard start, including failed runs

At the default memory, examples are:

• 20 new lots: $0.05005.
• 1,000 delivered new lots across five 200-lot runs: $2.50025.
• A later run with 10 changed observations: $0.01505.
• An entirely unchanged monitor run: the standard $0.00005 start event only, with no result events.

Duplicates, failed lot lookups, dropped fallback recommendations and unchanged monitor observations receive no result charge. There is no automatic dataset-item event. A changed row receives only the change event, not a lot event as well. Check the live Pricing tab before running. When testing your own Actor, Apify's platform-cost cap can stop a run even when no result events are being charged.

Scheduling and integrations

Create an Apify Task with your watch input, then schedule it at a suitable interval. Keep the same state name and avoid overlapping runs. Export the dataset or connect it to Google Sheets, Make, Zapier or n8n. Use OUTPUT to route partial or failed checks for review.

Via API, send the same input to:

POST https://api.apify.com/v2/acts/olliolli~catawiki-prices/runs
Authorization: Bearer YOUR_APIFY_TOKEN
Content-Type: application/json

Read the returned run's dataset and OUTPUT after completion. Keep your Apify token secret.

FAQ

Can I find underpriced objects? The Actor provides observations and available estimates for your own analysis. It does not establish authenticity, fair value, profitability or a guaranteed bargain.

Why is there no row on a repeat run? In monitor mode this can be expected for unchanged lots. Confirm unchangedLots, coverage and warnings before concluding nothing changed.

Does it collect sellers or bidders? It excludes dedicated seller, expert and bidder profile fields, contact fields and bid histories. Item titles/specifications may still name artists or contain identifying object information; this is not a guarantee of anonymization.

Does it log in, bid or solve a CAPTCHA? No. It uses anonymous public requests with browser-compatible transport. Lots whose public data flags an age check are excluded (including some alcohol lots). It stops on recognized login/challenge pages and does not endlessly rotate IPs. Availability can change.

Why did a result change since my last visit? Bids are live. Compare the observation timestamp and currency. Results describe what the public page returned at that time.

Independent product; not affiliated with or endorsed by Catawiki. See Catawiki's reserve-price explanation and Buyer Protection fee explanation for the distinction between a bid, a sale and checkout costs.