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ONE Engine Deterministic Text Segmentation – Tail Characters (P1, Tier 5)
x402
ONE Engine Deterministic Text Segmentation – Tail Characters (P1, Tier 5) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0014/call, status unknown (last checked 2026-10-15).
Returns the last Unicode character(s) from a text string using parameter=1, with Tier 5/10 diagnostic enrichment.
Price / call$0.0014
Success—
StatusUnknown
How this service works
Deterministic text segmentation utility: Return last Unicode characters; parameter=1. Tier 5/10 provides progressively richer diagnostics.
Output
Returns the last Unicode character (parameter=1) from the submitted text, along with Tier 5/10 progressive diagnostic metadata such as character code point, byte position, segmentation context, and enriched debug information about the extraction.
Example use cases
Validate string termination character
“I need to check what Unicode character this log entry ends with — can you run it through the tail-character segmentation tool with tier 5 diagnostics? Here's the string: 'Process completed successfully✓'”
Unicode suffix extraction for text pipeline
“Pull the last character from this user-submitted field value '田中太郎' so I can verify it ends with the expected Unicode ideograph — use the deterministic text segmentation endpoint with tier 5 output.”
Debug trailing whitespace or control characters
“I suspect this input string ' data entry ' has a trailing space or hidden character — can you use the tail-chars segmentation utility (tier 5) to tell me exactly what the last Unicode character is?”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v8/text-segment/tail-chars/p1/t5?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, character-level tail extraction from Unicode text with moderate diagnostic output (Tier 5). It is ideal for agents performing text validation, suffix checking, or pipeline preprocessing where knowing the exact trailing character(s) is required. Prefer it over higher-tier variants when mid-level diagnostics are sufficient and cost efficiency matters.
Side effects
- Empty string input returns an error or empty result
- Non-UTF-8 encoded input may cause unexpected character extraction
- Payment failure (HTTP 402) if USDC balance is insufficient
- Malformed POST body returns a 400 error
- Extremely long strings may hit payload size limits
Tags
x402
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