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    "title": "Substack Scraper & Newsletter Revenue Estimate",
    "description": "Substack scraper for the bestseller and rising leaderboards of any category: rank, paid-subscriber tier, prices, and an estimated annual revenue range per newsletter with the calculation shown. Tracks rank, tier and price changes between runs. $3 per 1,000 publications.",
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          "categories": {
            "title": "Categories",
            "type": "array",
            "description": "Substack categories by slug, id or name, or \"all\" for every category. Slugs: culture, technology, business, us-politics, finance, food, podcast, sports, art, world-politics, health-politics, news, fashionandbeauty, music, faith, climate, science, literature, fiction, health, design, travel, parenting, philosophy, comics, international, crypto, history, humor, education, film-and-tv, home-garden, games. Unknown names are skipped with a warning.",
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            ],
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              "type": "string"
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          },
          "boards": {
            "title": "Leaderboards",
            "type": "array",
            "description": "\"paid\" = Substack's bestseller leaderboard of the category, \"rising\" = Substack's rising leaderboard. Each board lists up to 100 publications.",
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              "type": "string",
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                "paid",
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          },
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            "minimum": 1,
            "maximum": 100,
            "type": "integer",
            "description": "How many ranks to read per category and board. Substack shows up to 100 (4 pages of 25).",
            "default": 25
          },
          "publications": {
            "title": "Extra publications to look up",
            "type": "array",
            "description": "Optional. Substack subdomains (lenny), custom domains (www.lennysnewsletter.com) or URLs. Each one is returned as a row with board \"lookup\".",
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              "type": "string"
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          },
          "trackChanges": {
            "title": "Track changes between runs",
            "type": "boolean",
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          },
          "includeCadence": {
            "title": "Include posting cadence",
            "type": "boolean",
            "description": "Read the 20 latest posts of each publication: adds last post date, posts per week and the share of paid-only posts, and saves the posts to a second dataset at $0.001 per post. Adds about 1 s per publication (archive requests are paced to stay under Substack's rate limit). A publication whose archive could not be read keeps null cadence fields and is listed in cadenceUnavailable (RUN_SUMMARY, CATEGORY_SUMMARY).",
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          },
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            "title": "Max concurrency",
            "minimum": 1,
            "maximum": 10,
            "type": "integer",
            "description": "How many requests run in parallel.",
            "default": 3
          },
          "proxyConfiguration": {
            "title": "Proxy configuration",
            "type": "object",
            "description": "Optional. Substack's public API works without a proxy; turn one on only if requests get blocked.",
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              "useApifyProxy": false
            }
          }
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                "type": "string",
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