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Kalshi API and Polymarket: Matching Prediction Markets by the Call
Two Kalshi routes returned 15 and 25 fields for one venue, with no tickers in common. The cross-venue match endpoint returned 20 pairs at 100 percent.
Software Review Data: What a G2 or Capterra API Returns
Capterra returned 25 reviews split into pros and cons. A niche product returned zero. G2 was blocked on both days we tried, five days apart.
Are Instagram Follower and Engagement Trackers Accurate?
Two providers disagreed by 2 followers out of 104 million. The same 12 posts gave 0.096% or 0.334% engagement depending on one undocumented choice.
Bounce Rates and Spam Traps When Validating an Email List
A verifier returned twelve fields for three addresses. None of them was spam_trap, and none could be. Here is what verification fixes and what it cannot.
How to Rate Limit Calls to a Third Party API
Six real failure responses collected over three days. Only one of them meant slow down, and telling them apart matters more than any backoff algorithm.
How to Scrape LinkedIn Without Getting Your Account Banned
The ban risk comes from tools that drive your logged-in session. Three endpoints returned profile data from a URL alone, with no cookie involved.
How to Stop Depending on One Scraping Vendor
Ten provider failures in three days, all while doing other work. None was a bad vendor. The defence is a second route you can reach without a rewrite.
Extract Pricing and Free Trial Information From Websites
One endpoint returned four plans, numeric amounts and a free_trial_available flag. It also disclosed that a model read the page, which changes everything.
Find All Pages on a Domain: Sitemap, Map or Crawl
One map call returned 1,139 pages for a site whose sitemap declared 1,113. Three of four sitemaps returned an index and no count at all.
MLS Real Estate API: What You Get When You Cannot Get MLS
MLS access needs a licence and a broker. Two public sources returned 40 listings and 48 agents with phones. What they carry, and what they do not.
Simply Wall St GraphQL API: What Returns Fundamentals Instead
There is no public Simply Wall St GraphQL API. An endpoint that does return fundamentals gave 26 line items across six periods, and named its own source.
Amazon ASIN Scraper: What to Do When It Returns Nothing
A purpose-built ASIN endpoint returned 26 fields and zero values for two valid ASINs. A generic extractor read the same page fine. Assert on values.
Datacenter Proxies vs Residential: What Each One Actually Fixes
A real residential IP with a real Chrome user agent still got 403 from two sites. The IP type was not the constraint. What each type does fix.
Email Extractor for a Domain: 1,333 Addresses, and What a Score Hides
One domain returned 1,333 known addresses. Two rows both scored 99, one corroborated eight times and one just once. The score hides that.
Puppeteer Extra Plugin Stealth: Check the Release Date First
The stealth plugin last shipped in March 2023. Puppeteer shipped last week. What that gap means, and what scrapy-playwright does differently.
C# Web Scraping: Keep HtmlAgilityPack, Drop the Fetch
The .NET parsing stack was never the problem. What breaks a C# scraper is the request leaving your server, and that half is not a language question.
LinkedIn Post Scraper: What Actually Comes Back
Posts, reactions and comments are three billing decisions in one call. A live run shows the fields, and the two flags that quietly multiply the bill.
Web Scraping vs API: You Are Choosing a Maintainer
Both end in an HTTP request returning the same facts. What differs is who owns the parser when the page changes, and whether anyone promised you anything.
XPath Cheat Sheet: The Dozen Expressions That Survive
Most XPath references list what the spec allows. This lists what still matches after a redesign, ranked by how long each anchor survives.
Zillow API: One Search Returned 41, 502 and 874 at the Same Time
Three count fields in one response, all different. Then one filter took the same search from 874 results to 4. Which number to read, and which to ignore.
Soku Runs the Campaign. The Auction Sits Outside It.
One small advertiser shares a single keyword with a bidder running 198,105 of them. An ad agent optimising inside its own account cannot see that.
Bing SERP Tracker: What to Use After the API Retired
Microsoft retired the Search API, so a Bing position now comes from three places. One is free and first-party, and most articles do not mention it.
Browser Automation When the Site Has No API
Check the premise first. The site owner has no API, but somebody may already have an endpoint for it, and a browser is the most expensive answer available.
Job Scraping Software: There Is No Single Job Feed
Postings are fragmented across boards by design, and no endpoint covers all of them. Pick per board, and the schema differences are the real work.