# World Model > A knowledge graph of podcasts, built from RSS metadata only. Every relationship > records the episode and the source text that produced it, plus the extraction > rule and a confidence score. Entities are linked to their records elsewhere: > ISBN and Open Library for books, IMDb for film and TV, Apple Podcasts for > shows, and Wikipedia/Wikidata for everything. Site: https://arcarelay.com Repository: https://github.com/martinmullins/worldmap ## How to read this site - Every page is server-rendered HTML; no JavaScript is required. - Entities live at /{type}/{slug}, e.g. https://arcarelay.com/person/ada-ferrer - Shows are at /feed/{id}, episodes at /ep/{id} - Relationship types: mentioned, discusses, references, hosted_by, appeared_on, authored, works_at, founded, recommended, influenced_by - Entity types: person, book, podcast, company, concept, film, product, place, website - Provenance: every edge on an entity page expands to the quote behind it. - Structured data: each entity page carries schema.org JSON-LD with sameAs links and ISBNs; books include ISBN, authors and covers. ## Programmatic access - JSON API: GET https://arcarelay.com/api/stats, /api/entities?q=, /api/entities/{id}, /api/entities/{id}/related, /api/episodes, /api/recent, /api/cross-podcast, /api/runs, /api/enrichment - MCP server (Model Context Protocol, Streamable HTTP): POST https://arcarelay.com/mcp Tools include search_entities, get_entity, get_related_entities, get_entities_across_podcasts, find_path_between_entities, get_recent_discoveries, add_podcast_feed, sync_podcast_feed, enrich_entities - sitemap.xml and robots.txt are available. ## Current size - 2105 entities (714 concept, 700 website, 483 person, 99 company, 96 book, 8 podcast, 5 product) - 13761 relationships, each with evidence - 1039 episodes from 4 podcasts ## Podcasts tracked - Darknet Diaries — https://arcarelay.com/feed/2 (180 episodes) - Dwarkesh Podcast — https://arcarelay.com/feed/3 (141 episodes) - Hard Fork — https://arcarelay.com/feed/4 (215 episodes) - Lex Fridman Podcast — https://arcarelay.com/feed/1 (503 episodes) ## Entities appearing in multiple shows - Technology (concept) — https://arcarelay.com/concept/technology - CEO (concept) — https://arcarelay.com/concept/ceo - Blog (website) — https://arcarelay.com/website/blog - FTX (concept) — https://arcarelay.com/concept/ftx - SBF (concept) — https://arcarelay.com/concept/sbf - AMA (concept) — https://arcarelay.com/concept/ama - Science (concept) — https://arcarelay.com/concept/science - AGI (concept) — https://arcarelay.com/concept/agi - youtube.com (website) — https://arcarelay.com/website/youtube-com - GPT (concept) — https://arcarelay.com/concept/gpt - Elon Musk (person) — https://arcarelay.com/person/elon-musk - Humanity (concept) — https://arcarelay.com/concept/humanity - miro.com (website) — https://arcarelay.com/website/miro-com - OpenAI (company) — https://arcarelay.com/company/openai - @Google (company) — https://arcarelay.com/company/google ## Most mentioned entities ### concept - Technology — https://arcarelay.com/concept/technology - Science — https://arcarelay.com/concept/science - Society & Culture — https://arcarelay.com/concept/society-and-culture - Philosophy — https://arcarelay.com/concept/philosophy - AGI — https://arcarelay.com/concept/agi - GPT — https://arcarelay.com/concept/gpt - Citations — https://arcarelay.com/concept/citations - CIA — https://arcarelay.com/concept/cia - CEO — https://arcarelay.com/concept/ceo - Humanity — https://arcarelay.com/concept/humanity - War — https://arcarelay.com/concept/war - Programming — https://arcarelay.com/concept/programming - Comedy — https://arcarelay.com/concept/comedy - Robotics — https://arcarelay.com/concept/robotics - FTX — https://arcarelay.com/concept/ftx - Money — https://arcarelay.com/concept/money - Mini-Stories: Vol 3 — https://arcarelay.com/concept/mini-stories-vol-3 - Deep Learning — https://arcarelay.com/concept/deep-learning - Nuclear Fusion — https://arcarelay.com/concept/nuclear-fusion - Black Holes — https://arcarelay.com/concept/black-holes ### podcast - Lex Fridman Podcast — https://arcarelay.com/podcast/lex-fridman-podcast - Hard Fork — https://arcarelay.com/podcast/hard-fork - Darknet Diaries — https://arcarelay.com/podcast/darknet-diaries - Dwarkesh Podcast — https://arcarelay.com/podcast/dwarkesh-podcast ### person - Lex Fridman — https://arcarelay.com/person/lex-fridman - Jack Rhysider — https://arcarelay.com/person/jack-rhysider - Dwarkesh Patel — https://arcarelay.com/person/dwarkesh-patel - perplexity.ai — https://arcarelay.com/person/perplexity-ai - Andrew Huberman — https://arcarelay.com/person/andrew-huberman - Elon Musk — https://arcarelay.com/person/elon-musk - Michael Malice — https://arcarelay.com/person/michael-malice - Craig Jones — https://arcarelay.com/person/craig-jones - Sara Imari — https://arcarelay.com/person/sara-imari - Stephen Wolfram — https://arcarelay.com/person/stephen-wolfram - Paul Rosolie — https://arcarelay.com/person/paul-rosolie - Sara Walker — https://arcarelay.com/person/sara-walker - Tesla AI — https://arcarelay.com/person/tesla-ai - Comma Ai — https://arcarelay.com/person/comma-ai - Manolis Kellis — https://arcarelay.com/person/manolis-kellis - Joscha Bach — https://arcarelay.com/person/joscha-bach - Tesla Optimus — https://arcarelay.com/person/tesla-optimus - Ezra Klein — https://arcarelay.com/person/ezra-klein - Michael Levin — https://arcarelay.com/person/michael-levin - Demis Hassabis — https://arcarelay.com/person/demis-hassabis ### website - Lexclips — https://arcarelay.com/website/lexclips - @Lexfridman — https://arcarelay.com/website/lexfridman - Lexpod — https://arcarelay.com/website/lexpod - Playlist — https://arcarelay.com/website/playlist - youtube.com — https://arcarelay.com/website/youtube-com - cash.app — https://arcarelay.com/website/cash-app - Copilot — https://arcarelay.com/website/copilot - hubermanlab.com — https://arcarelay.com/website/hubermanlab-com - malice.locals.com — https://arcarelay.com/website/malice-locals-com - canary.tools — https://arcarelay.com/website/canary-tools - mizzenandmain.com — https://arcarelay.com/website/mizzenandmain-com - UC5tj5QCpJKIl KIa4Gib5Xw — https://arcarelay.com/website/uc5tj5qcpjkil-kia4gib5xw - roka.com — https://arcarelay.com/website/roka-com - Blog — https://arcarelay.com/website/blog - Warzone — https://arcarelay.com/website/warzone - notion.com — https://arcarelay.com/website/notion-com - miro.com — https://arcarelay.com/website/miro-com - Power — https://arcarelay.com/website/power - givewell.org — https://arcarelay.com/website/givewell-org - Startups — https://arcarelay.com/website/startups ### company - The New York Times — https://arcarelay.com/company/new-york-times - OpenAI — https://arcarelay.com/company/openai - MIT — https://arcarelay.com/company/mit - @Google — https://arcarelay.com/company/google - antiwar.com — https://arcarelay.com/company/antiwar-com - SemiAnalysis — https://arcarelay.com/company/semianalysis - Netscape — https://arcarelay.com/company/netscape - Junglekeepers — https://arcarelay.com/company/junglekeepers - MatX — https://arcarelay.com/company/matx - Neuralink — https://arcarelay.com/company/neuralink - Anthropic — https://arcarelay.com/company/anthropic - FIRE — https://arcarelay.com/company/fire - Ethereum — https://arcarelay.com/company/ethereum - NYU — https://arcarelay.com/company/nyu - SpaceX — https://arcarelay.com/company/spacex - Waymo — https://arcarelay.com/company/waymo - NASA — https://arcarelay.com/company/nasa ### book - The Anxious Generation — https://arcarelay.com/book/anxious-generation