{ "openapi": "3.0.1", "info": { "title": "YouTube Hashtag Trend Discovery — Find Trending Videos", "description": "Discover viral YouTube hashtags by topic. Find trending Shorts and videos behind any hashtag — explore, bulk-audit, autocomplete-discover, or expand into related hashtags. Built for social media managers, content strategists, and trend forecasters. 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The `#` prefix is auto-stripped if present. Spaces are not allowed by YouTube — use the joined form (`machinelearning`, not `machine learning`). Non-Latin scripts and accented characters work fine (e.g. `アニメ`, `comida`)." }, "hashtags": { "title": "📚 Hashtags (bulk)", "type": "string", "description": "**`bulkHashtags` mode.** A list of hashtags, comma-separated OR one per line. Each hashtag becomes one paginated pull. The `#` prefix is auto-stripped. Limit 200 hashtags per run — split larger jobs into multiple runs." }, "seedTopic": { "title": "💡 Seed Topic (autocomplete)", "type": "string", "description": "**`suggestHashtags` mode.** A topic seed for YouTube's autocomplete engine (e.g. `trav`, `fitness`, `react`). YouTube returns up to 15 suggestions; we surface every suggestion that looks like a hashtag (starts with `#`) plus a normalized hashtag form for non-hashtag suggestions. Use this to find which hashtags YouTube *thinks* people search for in your topic." }, "seedHashtag": { "title": "🌐 Seed Hashtag (expansion)", "type": "string", "description": "**`hashtagExpansion` mode.** A seed hashtag — we search YouTube with it as a query and return BOTH the related hashtag suggestions YouTube surfaces AND the trending videos for that search. Charges `related-hashtag-row` per related hashtag plus `hashtag-video-row` per video found." }, "contentType": { "title": "🎥 Content Type", "enum": [ "videos", "shorts" ], "type": "string", "description": "For `hashtagVideos` and `bulkHashtags`. **`videos`** returns long-form videos with full metadata (title, channel, description, viewCount, publishDate). **`shorts`** returns YouTube Shorts only — these are sparser (viewCount, videoId, and thumbnail only — title/channel/date are not returned by YouTube for the Shorts feed). Pick one. To get both, run twice.", "default": "videos" }, "maxPages": { "title": "📄 Max pages per hashtag", "minimum": 1, "maximum": 25, "type": "integer", "description": "Max paginated pages to fetch PER hashtag for `hashtagVideos`, `bulkHashtags`, and `hashtagExpansion`. Each page returns about 36 video rows. Set to `1` for cheap sampling, `3-5` for a quality dataset, `10+` for deep dives. Range 1-25. Has no effect on `suggestHashtags` (single call always).", "default": 3 }, "geo": { "title": "🌍 Geo (optional)", "type": "string", "description": "Optional 2-letter country code (ISO 3166-1 alpha-2, e.g. `US`, `JP`, `DE`) to localize trending results. Different geos surface different videos for the same hashtag. Omit for global default." }, "lang": { "title": "🗣 Language (optional)", "type": "string", "description": "Optional language code (e.g. `en`, `es`, `ja`, `ar`) to localize the result language. Pairs well with `geo`. Omit for default." } } }, "runsResponseSchema": { "type": "object", "properties": { "data": { "type": "object", "properties": { "id": { "type": "string" }, "actId": { "type": "string" }, "userId": { "type": "string" }, "startedAt": { "type": "string", "format": "date-time", "example": "2025-01-08T00:00:00.000Z" }, "finishedAt": { "type": "string", "format": "date-time", "example": "2025-01-08T00:00:00.000Z" }, "status": { "type": "string", "example": "READY" }, "meta": { "type": "object", "properties": { "origin": { "type": "string", "example": "API" }, "userAgent": { "type": "string" } } }, "stats": { "type": "object", "properties": { "inputBodyLen": { "type": "integer", "example": 2000 }, "rebootCount": { "type": "integer", "example": 0 }, "restartCount": { "type": "integer", "example": 0 }, "resurrectCount": { "type": "integer", "example": 0 }, "computeUnits": { "type": "integer", "example": 0 } } }, "options": { "type": "object", "properties": { "build": { "type": "string", "example": "latest" }, "timeoutSecs": { "type": "integer", "example": 300 }, "memoryMbytes": { "type": "integer", "example": 1024 }, "diskMbytes": { "type": "integer", "example": 2048 } } }, "buildId": { "type": "string" }, "defaultKeyValueStoreId": { "type": "string" }, "defaultDatasetId": { "type": "string" }, "defaultRequestQueueId": { "type": "string" }, "buildNumber": { "type": "string", "example": "1.0.0" }, "containerUrl": { "type": "string" }, "usage": { "type": "object", "properties": { "ACTOR_COMPUTE_UNITS": { "type": "integer", "example": 0 }, "DATASET_READS": { "type": "integer", "example": 0 }, "DATASET_WRITES": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_READS": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_WRITES": { "type": "integer", "example": 1 }, "KEY_VALUE_STORE_LISTS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_READS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_WRITES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_INTERNAL_GBYTES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_EXTERNAL_GBYTES": { "type": "integer", "example": 0 }, "PROXY_RESIDENTIAL_TRANSFER_GBYTES": { "type": "integer", "example": 0 }, "PROXY_SERPS": { "type": "integer", "example": 0 } } }, "usageTotalUsd": { "type": "number", "example": 0.00005 }, "usageUsd": { "type": "object", "properties": { "ACTOR_COMPUTE_UNITS": { "type": "integer", "example": 0 }, "DATASET_READS": { "type": "integer", "example": 0 }, "DATASET_WRITES": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_READS": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_WRITES": { "type": "number", "example": 0.00005 }, "KEY_VALUE_STORE_LISTS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_READS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_WRITES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_INTERNAL_GBYTES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_EXTERNAL_GBYTES": { "type": "integer", "example": 0 }, "PROXY_RESIDENTIAL_TRANSFER_GBYTES": { "type": "integer", "example": 0 }, "PROXY_SERPS": { "type": "integer", "example": 0 } } } } } } } } } }