Benchmarks, diagnostics and guides for extracting data from public APIs and public web sources. Measured, dated, and honest about what fails.https://publicapidata.com/en-gbhttps://publicapidata.com/guides/find-company-contact-details/https://publicapidata.com/guides/find-company-contact-details/How to get an email, phone number and social profile for a company from its domain alone — what is findable, what is not, and why many sites return nothing.Thu, 03 Sep 2026 00:00:00 GMThttps://publicapidata.com/guides/role-emails-vs-personal/https://publicapidata.com/guides/role-emails-vs-personal/Why info@ and jane.smith@ are different kinds of data, how to tell them apart from a domain, and how to filter the placeholder addresses real companies publish.Thu, 03 Sep 2026 00:00:00 GMThttps://publicapidata.com/guides/youtube-shorts-transcripts/https://publicapidata.com/guides/youtube-shorts-transcripts/How to get captions from YouTube Shorts in bulk, why most transcript tools return nothing for them, and what Shorts text is actually good for.Thu, 03 Sep 2026 00:00:00 GMThttps://publicapidata.com/benchmarks/website-contact-availability/https://publicapidata.com/benchmarks/website-contact-availability/16% of 400 domains yielded an email address. Measured 3 September 2026, with failures split: dead domains, sites refusing crawlers, sites publishing nothing.Thu, 03 Sep 2026 00:00:00 GMThttps://publicapidata.com/compare/vs-youtube-transcript-api-python/https://publicapidata.com/compare/vs-youtube-transcript-api-python/When the free youtube-transcript-api Python library is the right choice, when it stops working in production, and what to move to when it does.Thu, 03 Sep 2026 00:00:00 GMThttps://publicapidata.com/compare/youtube-transcript-apis/https://publicapidata.com/compare/youtube-transcript-apis/The YouTube transcript APIs compared on price, coverage and failure handling, including the one capability Supadata has and we do not.Thu, 03 Sep 2026 00:00:00 GMThttps://publicapidata.com/playbooks/audience-research-reports/https://publicapidata.com/playbooks/audience-research-reports/Mine YouTube comments on a product category to find what buyers complain about and ask for, then sell the finding as a research report. Costed per comment.Thu, 03 Sep 2026 00:00:00 GMThttps://publicapidata.com/playbooks/b2b-lead-lists/https://publicapidata.com/playbooks/b2b-lead-lists/Build verified contact lists from a domain list, with role addresses split from personal ones, placeholders filtered, and the gaps stated. Costed per domain.Thu, 03 Sep 2026 00:00:00 GMThttps://publicapidata.com/playbooks/competitor-video-intelligence/https://publicapidata.com/playbooks/competitor-video-intelligence/Transcribe rival channels every month, report what they push and what they stopped saying, and sell it as a retainer. Costed per transcript.Thu, 03 Sep 2026 00:00:00 GMThttps://publicapidata.com/playbooks/course-notes-product/https://publicapidata.com/playbooks/course-notes-product/Turn public video courses into structured study notes you can sell or use as a lead magnet, without republishing the lecturer's words. Costed per transcript.Thu, 03 Sep 2026 00:00:00 GMThttps://publicapidata.com/playbooks/niche-rag-assistant/https://publicapidata.com/playbooks/niche-rag-assistant/Turn a field's video content into a cited question-answering assistant, and sell it as a build plus a subscription. Costed per transcript.Thu, 03 Sep 2026 00:00:00 GMThttps://publicapidata.com/playbooks/podcast-clip-service/https://publicapidata.com/playbooks/podcast-clip-service/Transcribe a podcast back catalogue, find the quotable moments by timestamp, and sell cut-ready clip specs. Costed at the real input price per episode.Thu, 03 Sep 2026 00:00:00 GMThttps://publicapidata.com/guides/conference-talk-transcripts/https://publicapidata.com/guides/conference-talk-transcripts/How to turn a conference playlist into searchable text, find the talks worth watching, and cite quotes with timestamps that link to the moment.Wed, 02 Sep 2026 00:00:00 GMThttps://publicapidata.com/guides/course-transcripts/https://publicapidata.com/guides/course-transcripts/How to get the transcript of every lesson in a video course, build revision notes you can search, and use an LLM to summarise without inventing content.Wed, 02 Sep 2026 00:00:00 GMThttps://publicapidata.com/guides/lecture-transcripts/https://publicapidata.com/guides/lecture-transcripts/How to extract transcripts for every lecture on a university channel, organise them per video, use them for accessibility, and build a research corpus.Wed, 02 Sep 2026 00:00:00 GMThttps://publicapidata.com/guides/youtube-transcript-api-not-working/https://publicapidata.com/guides/youtube-transcript-api-not-working/Works locally, fails in production? Empty response bodies? A symptom-by-symptom diagnosis of YouTube transcript API failures and what each one means.Wed, 02 Sep 2026 00:00:00 GMThttps://publicapidata.com/benchmarks/youtube-transcript-reliability/https://publicapidata.com/benchmarks/youtube-transcript-reliability/Measured success rates for YouTube transcript extraction across residential, datacenter and unproxied egress. 150 videos, 2 September 2026.Wed, 02 Sep 2026 00:00:00 GMT