https://actorstack.dev Documented Apify Actors for public web data: Nextdoor business listings and coches.net car inventory, with fill rates measured on real samples. en https://actorstack.dev/guides/engineering/measured-fill-rates-not-promises https://actorstack.dev/guides/engineering/measured-fill-rates-not-promises A field list is a promise. A fill rate is a measurement. This is what happened when one Actor's numbers were re-measured at n=741 instead of n=30. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/engineering/scraper-cache-metadata https://actorstack.dev/guides/engineering/scraper-cache-metadata Shared caching makes runs fast and cheap and quietly destroys trust — unless the row itself reports where it came from and when. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/engineering/pay-per-event-actor-pricing https://actorstack.dev/guides/engineering/pay-per-event-actor-pricing Charging per delivered row changes what you are allowed to ship. If an error row costs the user money, every bug becomes a billing dispute. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/engineering/robots-txt-compliant-scraping https://actorstack.dev/guides/engineering/robots-txt-compliant-scraping A site's robots.txt is the only machine-readable statement it makes about crawling. Treating it as the specification — and downloading it on every run — is why a scraper survives. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/coches-net/coches-net-vs-other-spanish-car-marketplaces https://actorstack.dev/guides/coches-net/coches-net-vs-other-spanish-car-marketplaces Coches.net, Milanuncios, Wallapop and AutoScout24 all list Spanish cars, and they differ in the one thing that matters for data work: how much structure the site publishes. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/coches-net/spain-used-car-market-data-analysis https://actorstack.dev/guides/coches-net/spain-used-car-market-data-analysis What you can and cannot conclude from marketplace listings: asking prices are not transaction prices, inventory is not demand, and the badge distribution tells you more than the fuel type does. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/coches-net/gdpr-scraping-personal-data-classifieds https://actorstack.dev/guides/coches-net/gdpr-scraping-personal-data-classifieds Scraping a marketplace means scraping individuals. Article 14 attaches an obligation to that which no scraper can discharge at scale — and a setting does not remove it, it transfers it. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/coches-net/coches-net-data-fields https://actorstack.dev/guides/coches-net/coches-net-data-fields A reference for the 55 fields in a coches.net listing row, each with the percentage of 550 real listings that had it filled, plus the two fields deliberately left out. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/coches-net/spanish-car-dealer-lead-lists https://actorstack.dev/guides/coches-net/spanish-car-dealer-lead-lists Dealer profiles come with business phone, address, postcode and province at 100% coverage on a 60-dealer sample. Private sellers' numbers are never included, and that is not a configuration gap. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/coches-net/dgt-environmental-label-data https://actorstack.dev/guides/coches-net/dgt-environmental-label-data Spain's environmental badge decides where a car can drive and what it is worth. What each code means, how often it appears in listing data, and why it stays untranslated. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/coches-net/find-used-cars-below-market-price-spain https://actorstack.dev/guides/coches-net/find-used-cars-below-market-price-spain A concrete screen: which fields to filter on, which segments carry the valuation data, and how to avoid the two biases that make a below-market list look better than it is. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/coches-net/coches-net-price-rank-explained https://actorstack.dev/guides/coches-net/coches-net-price-rank-explained Coches.net computes its own valuation for each model and publishes it next to the asking price. Two fields, filled on 77.6% of listings, that replace a pricing model you would otherwise have to build. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/coches-net/coches-net-api https://actorstack.dev/guides/coches-net/coches-net-api Coches.net publishes no public listing API. What it does publish is a server-rendered payload and a detailed robots.txt — which together define exactly what a compliant integration can read. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/coches-net/how-to-scrape-coches-net https://actorstack.dev/guides/coches-net/how-to-scrape-coches-net A walkthrough of extracting used-car listings from Spain's largest vehicle marketplace: how discovery works by facet rather than pagination, what the 55 fields contain, and what a thousand listings cost. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/nextdoor/is-scraping-nextdoor-legal https://actorstack.dev/guides/nextdoor/is-scraping-nextdoor-legal The interesting question is not "is scraping legal" but which specific data creates which specific obligation. Public business contact details and neighbor posts are not the same thing. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/nextdoor/nextdoor-trade-area-vs-city https://actorstack.dev/guides/nextdoor/nextdoor-trade-area-vs-city Asking Nextdoor for 200 dentists in one city returns the surrounding four towns too. We counted where the switch happens: results 1-75 were 96-100% local, everything past 76 was 0%. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/nextdoor/nextdoor-city-demographics-data https://actorstack.dev/guides/nextdoor/nextdoor-city-demographics-data The city dataset is the least known part of Nextdoor's public surface and the most useful for market sizing: residents, income, age, homeownership, subjective scores and full category coverage. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/nextdoor/nextdoor-local-lead-generation https://actorstack.dev/guides/nextdoor/nextdoor-local-lead-generation Which Nextdoor fields are usable for outreach, what the fill rates mean for a target list of a given size, and how to avoid building a list that is 40% dead ends. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/nextdoor/nextdoor-scraper-without-session-cookies https://actorstack.dev/guides/nextdoor/nextdoor-scraper-without-session-cookies Most Nextdoor scrapers ask for your session cookies. They work on setup day and fail silently later. The trade-off of refusing them, stated in both directions. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/nextdoor/nextdoor-city-slugs https://actorstack.dev/guides/nextdoor/nextdoor-city-slugs Nextdoor identifies a city as `city-name--state`. The rule sounds trivial and breaks on saints, hyphens and states that share a city name — here is the exact format and how to confirm a slug before spending a run on it. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/nextdoor/nextdoor-business-data-fields https://actorstack.dev/guides/nextdoor/nextdoor-business-data-fields A field-by-field reference for the 34 attributes in a public Nextdoor business record, each with the percentage of 741 real businesses that had it filled in. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/nextdoor/nextdoor-recommendations-vs-reviews https://actorstack.dev/guides/nextdoor/nextdoor-recommendations-vs-reviews Measured across 891 recommendations, 50% were neighbors asking for a provider and only 19% were actual reviews. Why the feed mixes three things, and how to separate them before they poison a sentiment model. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/nextdoor/nextdoor-api-alternatives https://actorstack.dev/guides/nextdoor/nextdoor-api-alternatives Nextdoor has no public data API for business listings or recommendations. Here is what its actual interfaces cover, why the gap exists, and how to get structured data without one. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT https://actorstack.dev/guides/nextdoor/how-to-scrape-nextdoor-business-listings https://actorstack.dev/guides/nextdoor/how-to-scrape-nextdoor-business-listings A complete walkthrough: how Nextdoor exposes business data to signed-out visitors, how to select cities and categories, what a first run costs, and how to read the 34 fields you get back. Oswaldo Carabano Tue, 18 Aug 2026 00:00:00 GMT