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Submit up to 1000 per batch — the full clustering benefit kicks in around 200+ keywords (below that you'll see fewer clusters, and seed-enrichment expansion runs only when you provide fewer than 200). Mixed-language batches work but produce stronger clusters when all keywords share a language. Each keyword: 1–200 chars, ASCII or Unicode. Duplicates (case-insensitive) are removed.", "items": { "type": "string" } }, "businessContext": { "title": "Business context (REQUIRED — unlocks CORE / OUTER classification)", "minLength": 1, "maxLength": 2000, "type": "string", "description": "1–3 sentences describing what your business does, who you serve, and what you sell. This is the Source Context: every cluster gets a CORE / OUTER classification — CORE = clusters whose central entity is the main offering or a direct derivative (build pillar pages); OUTER = clusters tangential to the core offering that still build topical authority (supporting articles for E-E-A-T). Required in v1.0 so every run yields a real topical map." }, "country": { "title": "Country / market", "enum": [ "us", "gb", "ca", "au", "de", "fr", "es", "it", "pl", "nl", "se", "no", "dk", "fi", "br", "pt", "jp", "in", "mx", "ie", "at", "ch", "be", "cz", "ro", "ae", "ar", "bg", "cl", "co", "ee", "eg", "gr", "hr", "hu", "id", "il", "kr", "lt", "lv", "my", "ng", "nz", "pe", "ph", "pk", "sa", "sg", "sk", "th", "tr", "ua", "vn", "za" ], "type": "string", "description": "ISO-3166 country code (lowercase, 2 chars). Drives Google Ads search volume + CPC + SERP locale routing. 53 countries supported. Unknown codes silently fall back to US / English.", "default": "us" }, "language": { "title": "Language (optional)", "enum": [ "en", "pl", "de", "fr", "es", "it", "pt", "nl", "sv", "no", "da", "fi", "ja", "ko", "zh", "tr", "ar", "ru", "uk", "cs", "hu", "ro", "el" ], "type": "string", "description": "ISO-639 lowercase 2-char language code. If omitted, the language tied to `country` is used. 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Uses a few extra SERP calls, already priced in.", "default": true }, "minClusterSize": { "title": "Min cluster size (optional, defaults to 2)", "minimum": 1, "maximum": 10, "type": "integer", "description": "Minimum keywords per cluster. Keywords that don't fit a cluster of this size are marked as outliers (cluster_id = -1). Increase to 3+ for tighter, fewer clusters; set to 1 to keep every keyword in some cluster.", "default": 2 }, "maxClusters": { "title": "Max clusters (optional, auto-tuned by default)", "minimum": 5, "maximum": 200, "type": "integer", "description": "Hard cap on the number of clusters produced. Default is auto-tuned via silhouette score (typically 50–80 for 1000 keywords). 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