ONE Engine Deterministic Tail-Words Text Segmentation (p48, Tier 10)

Choose this endpoint when you need a deterministic, reproducible extraction of the trailing 48 words from a text string and want the maximum available diagnostic context (Tier 10). It is ideal for text pipeline validation, tail-segment inspection, and automated agents that need consistent, low-cost word-boundary segmentation without generative or probabilistic behavior.

• Text input is empty or missing — returns error indicating no content to segment
• Input text has fewer than 48 words — may return all available words or an error depending on implementation
• Malformed POST body or missing required fields — returns 400-level error
• Payment not included or insufficient — returns HTTP 402 Payment Required
• Rate limiting or server-side worker errors — returns 5xx response