{ "openapi": "3.0.1", "info": { "title": "YouTube Channel Lookalike Finder", "description": "Find channels related to any YouTube channel: the channels its creator features on the channel page, plus a topic search when there are none. Channel ID, name, subscribers and source on every row. 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These rows are free.", "default": true }, "youtubeApiKey": { "title": "YouTube Data API key (optional)", "type": "string", "description": "Your own YouTube Data API v3 key for the topic-search fallback. A fallback lookup normally uses 101 quota units of that key (at most 201); found results are cached per channel for 24 hours. 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