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    {
      "slug": "agent-readability-service",
      "name": "Agent Readability Service",
      "url": "https://kc-it.pl/services/agent-readability",
      "description": "Done-for-you agent readability: llms.txt, schema.org JSON-LD, robots.txt AI-crawler posture and a 13-check agent-readability audit delivered for your own domain, so AI agents can find, parse and cite your product. Case study: 12 sites, average score 68.6 to 97.5. Open a [hire] issue on the repo or email 110kc3@gmail.com.",
      "category": "other",
      "pricing": "paid",
      "tier": "free",
      "tags": [
        "geo",
        "llms-txt",
        "json-ld",
        "audit"
      ],
      "page": "https://index.percall.dev/l/agent-readability-service.html",
      "json": "https://index.percall.dev/listings/agent-readability-service.json"
    },
    {
      "slug": "ai-product-index",
      "name": "AI Product Index",
      "url": "https://index.percall.dev/",
      "description": "A machine-readable directory where AI products register themselves so AI agents can discover them. Ask it in natural language (NLWeb), call it as an MCP server over HTTP, or search the JSON API. Autonomous registration via GitHub issues, free listings, per-listing pages with schema.org JSON-LD.",
      "category": "api",
      "pricing": "free",
      "tier": "free",
      "tags": [
        "directory",
        "discovery",
        "seo",
        "registry"
      ],
      "machine_endpoints": {
        "llms_txt": "https://index.percall.dev/llms.txt",
        "openapi": "https://index.percall.dev/openapi.yaml",
        "mcp": "https://index.percall.dev/mcp"
      },
      "page": "https://index.percall.dev/l/ai-product-index.html",
      "json": "https://index.percall.dev/listings/ai-product-index.json"
    },
    {
      "slug": "bankier-street-bets",
      "name": "Gieldowy Express",
      "url": "https://110kc3.github.io/bankier-street-bets/",
      "description": "Satirical stock tabloid: Buy/Hold/Sell sentiment signals for Warsaw Stock Exchange (GPW) companies, scored heuristically from Bankier.pl forum chatter and refreshed daily. Per-company signal, numeric score and trend direction as JSON at /data/index.json. Content is in Polish. Satire and heuristics, not investment advice or a regulated recommendation.",
      "category": "app",
      "pricing": "free",
      "tier": "free",
      "tags": [
        "poland",
        "stocks",
        "sentiment",
        "satire"
      ],
      "page": "https://index.percall.dev/l/bankier-street-bets.html",
      "json": "https://index.percall.dev/listings/bankier-street-bets.json"
    },
    {
      "slug": "overtimelog",
      "name": "OvertimeLog",
      "url": "https://overtimelog.com/",
      "description": "A local-only desktop app that detects after-hours Slack activity and turns it into billable, evidence-backed overtime records. Built for the EU Right to Disconnect era: analysis runs entirely on the user's own machine, the activity data never leaves it, and there is no server to send it to. Exports to PDF, Excel and CSV.",
      "category": "app",
      "pricing": "paid",
      "tier": "free",
      "tags": [
        "slack",
        "overtime",
        "eu-compliance",
        "privacy",
        "desktop"
      ],
      "machine_endpoints": {
        "llms_txt": "https://overtimelog.com/llms.txt"
      },
      "page": "https://index.percall.dev/l/overtimelog.html",
      "json": "https://index.percall.dev/listings/overtimelog.json"
    },
    {
      "slug": "polish-sweepstakes",
      "name": "Konkursy i loterie bez zakupu",
      "url": "https://110kc3.github.io/polish-sweepstakes/",
      "description": "Polish sweepstakes and prize competitions that require no purchase, or that offer a free method of entry, scraped daily from several sources and liveness-checked. Deadlines, prizes and entry rules, pre-rendered into the HTML so no JavaScript is needed. JSON at /data/lotteries.json. Content is in Polish; the site is informational and is not the organiser of any competition.",
      "category": "app",
      "pricing": "free",
      "tier": "free",
      "tags": [
        "poland",
        "sweepstakes",
        "open-data"
      ],
      "page": "https://index.percall.dev/l/polish-sweepstakes.html",
      "json": "https://index.percall.dev/listings/polish-sweepstakes.json"
    },
    {
      "slug": "protocol-index",
      "name": "Protocol Index",
      "url": "https://protocolindex.eu/",
      "description": "An index mapping Bryan Johnson's publicly-documented Blueprint supplement stack (54 entries) to localized Amazon links across seven marketplaces, with a six-language UI, a build-by-goal flow over benefit tags, per-supplement dosage, timing and source rationale, and a printable daily checklist. An index, not medical advice, and not affiliated with anyone it references.",
      "category": "app",
      "pricing": "free",
      "tier": "free",
      "tags": [
        "supplements",
        "blueprint",
        "catalog",
        "multilingual"
      ],
      "machine_endpoints": {
        "llms_txt": "https://protocolindex.eu/llms.txt"
      },
      "page": "https://index.percall.dev/l/protocol-index.html",
      "json": "https://index.percall.dev/listings/protocol-index.json"
    },
    {
      "slug": "przetargimiejskie",
      "name": "Przetargi Miejskie",
      "url": "https://przetargimiejskie.pl/",
      "description": "History of Polish municipal property auctions, scraped daily from official BIP bulletins: starting prices, PLN/m2, auction rounds and sale outcomes for 54 cities. Static pages per city and per property, plus JSON at /data/index.json and /data/<city>/properties.json. Agent card at /.well-known/agent.json. Content is in Polish; data is informational, only the issuing office's own documents are binding.",
      "category": "app",
      "pricing": "free",
      "tier": "free",
      "tags": [
        "poland",
        "property",
        "auctions",
        "open-data"
      ],
      "machine_endpoints": {
        "llms_txt": "https://przetargimiejskie.pl/llms.txt"
      },
      "page": "https://index.percall.dev/l/przetargimiejskie.html",
      "json": "https://index.percall.dev/listings/przetargimiejskie.json"
    },
    {
      "slug": "puzle",
      "name": "Wykop czy Wyborcza?",
      "url": "https://110kc3.github.io/puzle/",
      "description": "Daily Polish-language guessing game: a real newspaper headline is shown and the player guesses which outlet published it. A new puzzle every day, with the full archive available as JSON at /puzzles/index.json and /puzzles/pool.json.",
      "category": "app",
      "pricing": "free",
      "tier": "free",
      "tags": [
        "poland",
        "game",
        "news",
        "quiz"
      ],
      "page": "https://index.percall.dev/l/puzle.html",
      "json": "https://index.percall.dev/listings/puzle.json"
    },
    {
      "slug": "rentgen-ofert",
      "name": "Rentgen Ofert",
      "url": "https://110kc3.github.io/rentgen-ofert/",
      "description": "Every house and flat sale listing in the Polish Slaskie voivodeship, aggregated twice daily from five portals (Otodom, OLX, Gratka, Morizon, n-online), de-duplicated, with price history and cross-referenced notarial-deed (RCN) transaction prices. Published as a schema.org Dataset with six JSON DataDownload endpoints; summary at /data/slaskie/meta.json.",
      "category": "app",
      "pricing": "free",
      "tier": "free",
      "tags": [
        "poland",
        "property",
        "real-estate",
        "open-data"
      ],
      "machine_endpoints": {
        "llms_txt": "https://110kc3.github.io/rentgen-ofert/llms.txt"
      },
      "page": "https://index.percall.dev/l/rentgen-ofert.html",
      "json": "https://index.percall.dev/listings/rentgen-ofert.json"
    },
    {
      "slug": "stare-aparaty",
      "name": "Stare Aparaty",
      "url": "https://stareaparaty.com/",
      "description": "Polish-language catalog of second-hand analog (film) cameras, refreshed daily from the owner's live OLX listings, plus hand-picked film stocks and developing gear. Every entry carries title, price in PLN, availability and a direct purchase link. JSON catalog at /olx_meta.json, everything inlined at /llms-full.txt, agent card at /.well-known/agent.json.",
      "category": "app",
      "pricing": "free",
      "tier": "free",
      "tags": [
        "poland",
        "cameras",
        "analog",
        "catalog",
        "shopping"
      ],
      "machine_endpoints": {
        "llms_txt": "https://stareaparaty.com/llms.txt"
      },
      "page": "https://index.percall.dev/l/stare-aparaty.html",
      "json": "https://index.percall.dev/listings/stare-aparaty.json"
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}